PDW90 Point to Multi-Point Wireless System

Field Units Available in Aluminum and Stainless Steel

Base Station Connected to PDW Manager Software

Easy-to-Install Base Station I/O Modules

Features

Signal Wire Replacement System Consisting of Wireless Base Station and Field Units
Wireless Point to Multi-Point Signal Wire Replacement for up to 32 4-20 mA Signals
Range: 1 Mile Line-of-Sight Outdoor, 500 Feet Indoor; Repeaters Available to Extend Range
Wireless Transmission Between Base Station and any Field Unit of
◦ 4-20 mA (Separate Signals to and from Base Station))
◦ Discrete (4 digital I/O Signals to and from Base Station))
◦ RS-485 Modbus
Inputs: (Wired to Field Units) 4-20 mA or 0-10 V (1), Discrete/Digital (up to 4), Modbus
Outputs: (Wired to Field Units) 4-20 mA (1), Discrete/Digital (up to 4), Relays (2, opt), Modbus
Base Station I/O Modules for 4-20 mA Inputs, 4-20 mA Outputs, Relay Outputs, Digital I/O
Base Stations with slots for 2, 6, or 16 Field Installable I/O Modules and Modbus
Loss of Signal (LoS) Digital Output
PDA10 Signal Strength Survey Tool to "Try Before You Buy"
Simple to Configure Using PDW Manager Programming Software and On-Board USB
Device Communication Secured by Enabling 128-bit AES Encryption
Password Protection
Remote Yagi Directional Antennas Available
Base Stations Housed in Plastic NEMA 4X Field Enclosures
Field Units Available in IP68, NEMA 4X Aluminum & Stainless Steel Enclosures
Field Unit Operating Temperature Range: -55 to 75°C (-67 to 167°F)
PCBs are Conformal Coated for Dust & Humidity Protection
Power: 9-30 VDC, Base Station & Field Units
3-Year Warranty

Overview

Base Station

Field Unit

Signal Wire Replacement for Point to Multi-Point Industrial Wireless Applications

In its most basic form, the PDW90 consists of field units (up to 32) that accept 4-20 mA signals and transmits them wirelessly to a base station. The primary advantage of this system is how simple and economical it is to get multiple signals (not just 4-20 mA, also discrete (digital) and Modbus) from where you have them to where you need them – all without having to run wires!

The wireless communication between the field units and the base station is bi-directional. That means you can send 4-20 mA, discrete and Modbus signals from the field units to the base station and also send completely different 4-20 mA, discrete and Modbus signals from the base station to the field units. For instance, the field unit could send a 4-20 mA signal to the base station corresponding to the level in a tank and the base station could send a 4-20 mA sig-nal to the field unit to control a valve.

Field units are also equipped with four digital I/O that can each be independently programmed as an input or an output. A Loss of Signal warning is also available by connecting devices to the G and LS screw terminals.

To indicate alarm situations in the field, the field unit can be equipped with an optional, field installable, two relays module. These relays are rated Form A (SPST) 5A and are controlled by the digital outputs on the base station.

The base stations are available in configurations for 2, 6, or 16 I/O slots for a variety of field installable I/O modules. The available I/O modules are:

Dual Analog Input
Dual Analog Output
Dual Relay Output
Four Digital I/O

The specified range between the base station and field units is 1 mile line-of-sight outdoor and 500 feet indoor and repeaters are available to extend the range. A low-cost wireless survey tool, Model PDA10, is available to test the signal strength of your application before you buy. And if the PDW90 system does not work in your application, you can return it for full credit!

Key Features

PDW Manager PC Programming Software

PDW Manager PC Software is required to program the PDW90 wireless base station; there are no programming buttons on the unit. PDW field units have programming buttons that can be used for basic setup, but PDW Manager software is required for advanced feature programming. Field units and base stations connect to a PC via a USB connection with the provided cable. PDW Manager is available for download at

Plastic NEMA 4X Base Stations Available in Three Sizes

The PDW90 base stations are available in three different sized plastic NEMA 4X enclosures based on how many inputs and outputs are needed. The cover on the two larger enclosures is hinged and secured with stainless steel clasps. The cover on the smaller enclosure is secured with screws. The largest base station can house up to 16 I/O modules. The middle size base station can hold up to 6 modules and the smallest base station can hold 2 modules.

Easy-To-Install I/O Modules

These modules designed specifically for the PDW90 base stations are easy to install and add functionality to the wireless system. The electronics in the modules are completely enclosed for protection. There are four types of modules available: dual analog inputs, dual analog outputs, four digital I/O, and dual relay outputs. Each module also comes with a removable connector plug for easy wiring.

Field Unit Relays Option Module

The PDW90 field units are available with a relays option module that includes two Form A (SPST) relays. The module is easily installed by the user into the base of the enclosure with the four screws provided. The removable connector plugs make wiring easy.

PDW30 Units Available in
Aluminum or Stainless Steel

Field Units Available in Aluminum or Stainless Steel

The PDW90 field units are available in an IP68, NEMA 4X aluminum or stainless steel enclosure. The enclosures feature a built-in flange for wall or pipe mounting, built-in loop for a stainless steel tag, locking screw, and hole for a tamper-proof wire & seal. The enclosure also includes two 3/4" threaded conduit openings for wiring. The field units can operate in temperatures of -55 to 75°C (-67 to 167°F).

CapTouch Through-Glass Buttons

The PDW90 field units are equipped with four capacitive sensors that operate as through-glass buttons so that they can be operated without removing the cover (and exposing the electronics) in an unclean area.

CapTouch buttons are designed to work under any lighting condition and are not affected by random changes in light or shadows. To protect against false triggering a long button press of about 2 seconds is required to wake up the buttons when they have not been in use for more than 20 seconds.

Applications

Wireless Tank Level Monitoring of Two Tanks with Field Alarms

Note: Power requirements / connections not shown in diagram. Consult manuals for details. Cover of PDW90 removed to show I/O modules.

In the two tanks, the level transmitter’s 4-20 mA signal is connected to the PDW90 field unit’s analog input.
The PDW90 field unit then wirelessly transmits the level signal to the base station located in the control room, where the base station’s 4-20 mA output duplicates the signal.
The base station’s analog outputs are connected to two PD6602 loop-powered meters, which display the 4-20 mA signals as volume in gallons and check the level for high and low conditions.
The PD6602 is programmed to indicate an alarm condition when the level exceeds 7000 gallons as displayed on the meter.
Relay 1 on the meter connects to digital input 1 of the primary unit.
The low and high alarm light / horns in the field are driven as follows:
◦ Relay 1 (RY-1) in the PD6602 tank 1 display is connected to digital input 1 (DI-1) on the base station. This signal is wirelessly transmitted to the field unit on tank 1. (On the field unit) digital output 1 (DO-1) controls relay 1 (RY-1), which turns on the high alarm light / horn, warning the operator.
◦ Relay 2 (RY-2) in the PD6602 tank 2 display is connected to digital input 2 (DI-4) on the base station. This signal is wirelessly transmitted to the field unit on tank 2. (On the field unit) digital output 2 (DO-2) controls relay 2 (RY-2), which turns on the low alarm light / horn, warning the operator.

Parts Needed for This System:

Base Station

Model Number	Qty	Description
PDW90-GP-PL-BASE-02	1	PDW90 Wireless Process Signal Base Station, (2) I/O Slots
PDWM90-BASE-2AO	1	PDW90 Dual Analog Output Base Station Module
PDWM90-BASE-4DI	1	PDW90 Four Digital I/O Base Station Module

Field Units

Model Number	Qty	Description
PDW90-GP-AL-FIELD	2	PDW90 Wireless Process Signal Field Unit
PDWM-2RY	2	Relays Option Module, Two Form A (SPST)

Other Parts

Model Number	Qty	Description
PDA-LHR	4	Red Light / Horn
PD6602-L2N	2	1/8 DIN Loop-Powered Digital Panel Meter with Two Relays

Wireless Tank Level Monitoring of Level Switches

Note: Power requirements / connections not shown in diagram. Consult manuals for details. Cover of PDW90 removed to show I/O modules.

The switch contacts from the two level switches in each tank are connected to the digital inputs on the field units.
The states of the switch contacts are wirelessly transmitted to the base station.
The digital outputs from the base station are connected to a PD158 Vigilante II 8-point annunciator for local indication of tank level status.

Parts Needed for This System:

Base Station

Model Number	Qty	Description
PDW90-GP-PL-BASE-02	1	PDW90 Wireless Process Signal Base Station, (2) I/O Slots
PDWM90-BASE-4DI	2	PDW90 Four Digital I/O Base Station Module

Field Units

Model Number	Qty	Description
PDW90-GP-AL-FIELD	2	PDW90 Wireless Process Signal Field Unit

Other Parts

Model Number	Qty	Description
PD158-6R2-1	1	1/8 DIN 8-Input Alarm Annunciator

Wireless Tank Level Monitoring of 32 Modbus RTU Server Transmitters

Note: Power requirements / connections not shown in diagram. Consult manuals for details. Cover of PDW90 removed to show I/O modules.

The 32 field units are not wired together.
Each field unit sends the Modbus signal wirelessly to the base station.
The base station is connected to a ConsoliDator+ that displays the level in the tanks.
The ConsoliDator+ acts as the client.

• The Modbus Client must be connected to the base station RS-485.

Parts Needed for This System:

Base Station

Model Number	Qty	Description
PDW90-GP-PL-BASE-02	1	PDW90 Wireless Process Signal Base Station, (2) I/O Slots (None being used in this application)

Field Units

Model Number	Qty	Description
PDW90-GP-AL-FIELD	32	PDW90 Wireless Process Signal Field Unit

Other Parts

Model Number	Qty	Description
PD9000-GP	1	ConsoliDator+ Multivariable Controller
PDK9000-M1	1	Add-On Feature: ConsoliDator+ Modbus Client/Snooper/Spoofer

Note: A potentially lower cost solution to this application would be to use a PDW30 point-to-point system. All the level transmitters would be wired on one RS-485 bus that would be connected to a PDW30 Primary Unit. The Primary Unit would wirelessly transmit the Modbus signal to a PDW30 Secondary Unit.

Wireless Tank Level Monitoring of 32 4-20 mA Transmitters

Note: Power requirements / connections not shown in diagram. Consult manuals for details. Cover of PDW90 removed to show I/O modules.

The 32 field units send the 4-20 mA signals wirelessly to the base station.
The base station outputs (32) 4-20 mA signals that correspond to signals that are wirelessly transmitted to the base station to a PLC.

Parts Needed for This System:

Base Station

Model Number	Qty	Description
PDW90-GP-PL-BASE-16	1	PDW90 Wireless Process Signal Base Station, (16) I/O Slots
PDWM90-BASE-2AO	16	PDW90 Dual Analog Output Base Station Module

Field Units

Model Number	Qty	Description
PDW90-GP-AL-FIELD	32	PDW90 Wireless Process Signal Field Unit

Wireless Remote Valve Control on Two Tanks

Note: Power requirements / connections not shown in diagram. Consult manuals for details. Cover of PDW90 removed to show I/O modules.

In the two tanks, the level transmitter’s 4-20 mA signal is connected to the PDW90 field unit’s analog input.
The PDW90 field unit then wirelessly transmits the level signal to the base station located in the control room, where the base station’s 4-20 mA output duplicates the signal.
The base station’s analog outputs are connected to two PD6602 loop-powered meters, which display the 4-20 mA signals as volume in gallons and check the level for high and low conditions.
The operator uses a PD460 valve positioner to send a 4-20 mA signal to the base station's analog input.
That valve position signal is wirelessly transmitted to the field unit located in the field at the tank, where the field unit's 4-20 mA output duplicates the signal.
The field unit’s 4-20 mA output is connected to a digital valve positioner. The valve is opened, and the tank starts to fill again.
The operator monitors the level rising or falling on the PD6602 displays and uses the PD460 valve positioner to close or open the valve when the tank reaches the desired level.
A digital output on digital I/O module is used to generate a Loss of Signal signal (LoS).

Parts Needed for This System:

Base Station

Model Number	Qty	Description
PDW90-GP-PL-BASE-06	1	PDW90 Wireless Process Signal Base Station, (6) I/O Slots
PDWM90-BASE-2AI	1	PDW90 Dual Analog Input Base Station Module
PDWM90-BASE-2AO	1	PDW90 Dual Analog Output Base Station Module
PDWM90-BASE-4DI	1	PDW90 Four Digital I/O Base Station Module (used for Loss of Signal; LoS)

Field Units

Model Number	Qty	Description
PDW90-GP-AL-FIELD	2	PDW90 Wireless Process Signal Field Unit

Other Parts

Model Number	Qty	Description
PDA-LHR	4	Red Light / Horn
PD6602-L2N	2	1/8 DIN Loop-Powered Digital Panel Meter with Two Relays
PD460	2	Panel Mount 4-20 mA Valve Positioner

Wireless Tank Level Monitoring on Four Tanks

Note: Power requirements / connections not shown in diagram. Consult manuals for details. Cover of PDW90 removed to show I/O modules.

The level in each tank is measured by a 4-20 mA level transmitter that is connected to a PDW90 field unit.
Each PDW90 field unit wirelessly transmits the 4-20 mA signal back to the base station.
The base station is equipped with two dual analog output modules that that send the 4-20 mA signals to the ConsoliDator+.

Parts Needed for This System:

Base Station

Model Number	Qty	Description
PDW90-GP-PL-BASE-02	1	PDW90 Wireless Process Signal Base Station, (2) I/O Slots
PDWM90-BASE-2AO	2	PDW90 Dual Analog Output Base Station Module

Field Units

Model Number	Qty	Description
PDW90-GP-AL-FIELD	4	PDW90 Wireless Process Signal Field Unit

Other Parts

Model Number	Qty	Description
PD9000-GP-4AI	1	ConsoliDator+ Multivariable Controller with Four 4-20 mA inputs

Wireless Transmission of Modbus Inputs and Outputs

Note: Power requirements / connections not shown in diagram. Consult manuals for details. Cover of PDW90 removed to show I/O modules.

The ConsoliDator+ Modbus client is connected to the base station and sends wireless requests to the level transmitters via the PDW90 field units.
The ConsoliDator+ Modbus client processes the data received from the field units (via the base station) and displays it in engineering units.
The PD6730X Modbus scanner can provide tank side indication of level, temperature, interface and other Modbus variables.

• The Modbus Client must be connected to the base station RS-485.

Parts Needed for This System:

Base Station

Model Number	Qty	Description
PDW90-GP-PL-BASE-02	1	PDW90 Wireless Process Signal Base Station, (2) I/O Slots

Field Units

Model Number	Qty	Description
PDW90-GP-AL-FIELD	3	PDW90 Wireless Process Signal Field Unit

Other Parts

Model Number	Qty	Description
PD9000-GP	1	ConsoliDator+ Multivariable Controller
PD9000-M1	1	Add-On Feature: ConsoliDator+ Modbus Client/Snooper/Spoofer
PD6730-AX0-I-2	3	General Purpose Modbus Scanner for Tank Side Level Indication

Extending Signal Range with PDWR Repeaters

Note: Power requirements / connections not shown in diagram. Consult manuals for details. Cover of PDW90 removed to show I/O modules.

The PDW30 field units are too far away from the base station, so a PDW30 repeater unit is installed in the application to extend the wireless signal range.
The mA signals are transmitted wirelessly to the PDW90 base station through the PDW30 repeater unit.
The base station’s analog outputs are connected to PD6602 loop-powered meters, which display the 4-20 mA signals as volume in gallons.
The low and high alarm light / horns in the field are driven as follows:
◦ Relay 1 (RY-1) in the PD6602 tank 1 display is connected to digital input 1 (DI-1) on the base station. This signal is wirelessly transmitted to the field unit via the PDW30 repeater unit. (On the field unit) digital output 1 (DO-1) controls relay 1 (RY-1), which turns on the high alarm light / horn, warning the operator.
◦ Relay 2 (RY-2) in the PD6602 tank 2 display is connected to digital input 2 (DI-4) on the base station. This signal is wirelessly transmitted to the field unit via the PDW30 repeater unit. (On the field unit) digital output 2 (DO-2) controls relay 2 (RY-2), which turns on the low alarm light / horn warning the operator.

Parts Needed for This System:

Base Station

Model Number	Qty	Description
PDW90-GP-PL-BASE-02	1	PDW90 Wireless Process Signal Base Station, (2) I/O Slots
PDWM90-BASE-2AO	1	PDW90 Dual Analog Output Base Station Module
PDWM90-BASE-4DI	1	PDW90 Four Digital I/O Base Station Module

Field Units

Model Number	Qty	Description
PDW90-GP-AL-FIELD	2	PDW90 Wireless Process Signal Field Unit
PDWM-2RY	2	Relays Option Module, Two Form A (SPST)
PDW30-GP-AL-REP	1	PDW90 Wireless Process Signal Repeater Unit

Other Parts

Model Number	Qty	Description
PDA-LHR	4	Red Light / Horn
PD6602-L2N	2	1/8 DIN Loop-Powered Digital Panel Meter with Two Relays

Except where noted all specifications apply to operation at +25°C.

PDW90 Base Station

General

Maximum Connected Field Units	32 field units per base station
Display	32-character dual-line alphanumeric dot matrix LCD display with backlight Visual Area: 2.54" x 0.63" (64.6 x 16.0 mm) Character Height: 0.2" (5.5 mm) Display used for displaying communications link status and signal strength.
Network ID	Field selectable: 0 - 99
Peak Antenna Gain	1.8 dBi +/- 1.0
Programming Methods	Via PC with PDW Manager software. Configuration files can be saved for later use.
Input Power	9-30 VDC, 40 W maximum. Minimum power: 2.0 W (Modbus only). Power consumption is dependent on type and number of modules installed, refer to each individual module’s power specification to calculate the total power needed.
Non-Volatile Memory	All programmed settings are stored in non-volatile memory for a minimum of ten years if power is lost.
Isolation	500 V
Environmental	Operating temp. range: -40 to 65°C (display inoperable < -20 °C) Storage temp. range: -40 to 85°C Relative humidity: 0 to 90% non-condensing Printed circuit boards are conformally coated
Connections	Removable screw terminal blocks accept 12 to 26 AWG wire.
Connectors Tightening Torque	4.5 lb-in (0.5 Nm)
Peak Antenna	2.15 dBi ± 1.0
Enclosure	NEMA 4X; Thermoplastic Polyester; Color: Gray
Dimensions	2-Module Base Station: 7.9" x 5.9" x 6.4" (200 mm x 150 mm x 163 mm) (W x H X D) 6-Module Base Station: 7.9" x 11.8" x 7.0" (201 mm x 300 mm x 178 mm) (W x H X D) 16-Module Base Station: 11.81" x 15.75" x 7.08" (300 mm x 400 mm x 180 mm) (W x H X D) Antenna Height: 6.73” (171 mm) Note: Antenna is installed by the user.
Weight	2-Module Base Station: 2.1 lbs (0.6 kg) 6-Module Base Station: 3.3 lbs (1.5 kg) 16-Module Base Station: 5.5 lbs (2.5 kg)
Warranty	3 years parts and labor. See Warranty Information and Terms & Conditions on www.predig.com for complete details.

Dual Analog Input Module

Inputs	Two (2) Field selectable: 4-20 mA, 0 10 V, 0-5 V, 1-5 V
Accuracy	±0.03% of calibrated span ±1 count
Isolation	1500 VRMS
Recalibration	All ranges are calibrated at the factory. Recalibration is recommended at least every 12 months.
Temperature Drift	0.005% of calibrated span/°C max from 0 to 65°C ambient, 0.01% of calibrated span/°C max from -40 to 0°C ambient
Power Consumption	0.84 W max @ 24 V Add to base station minimum power.
Input Impedance	Voltage ranges: greater than 110 kΩ; Current ranges: less than 220 Ω
HART Transparency	Analog input will not interfere with existing HART communications on the wired 4-20 mA signal.

Dual 4-20 mA Output Module

Outputs	(2) Two
Output Source	Analog input from connected wireless unit
Calibration	Factory calibrated: 4.000 to 20.000 = 4-20 mA output
Accuracy	± 0.1% of span ± 0.004 mA
Isolation	500 V
Temperature Drift	0.4 μA/°C max from 0 to 65°C ambient, 0.8 μA/°C max from -40 to 0°C ambient
Power Consumption	02.42 W max @ 24 V Add to base station minimum power.
Loop Power Supply	Internally powered; no external supply needed
Output Loop External Resistance	Power Supply	Minimum	Maximum
	24 VDC	10 Ω	900 Ω
Loss of Signal (RF)	After approximately 15 seconds of trying to reconnect, the mA output will go to the Link Lost Output value selected via the PDW Manager software (i.e. 3.2, 3.5, 3.8, 20.5, 20.8, 23.0 mA, or Stay as Is).

Digital Inputs / Outputs Module

Channels	(4) Four (discrete) digital I/O connections, independently field selectable as either inputs or outputs. A digital output can be used to indicate loss of wireless signal as described below.
Active Low or Active High	DI/DO logic can be selected via the PDW Manager software.
DI Logic High	3 to 5 VDC
DI Logic Low	0 to 1.1 VDC
DI Contact	Dry contact to ground can be used to activate the input (Active Low)
DO Logic High	3.0 to 5.0 VDC
DO Logic Low	0 to 0.5 VDC
Power Consumption	0.50 W max @ 24 V Add to base station minimum power.
Source Current	20 mA maximum output current
Sink Current	0.5 mA minimum input current
Loss of Signal	Digital output goes to the Link Lost Output state selected via the PDW Manager software. Active: Logic high (5 V) Inactive: Logic low (0 V) Stay as Is: State does not change

Dual Relays Module

Number of Relays	(2) Two
Rating	SPDT (Form C); rated 3 A @ 30 VDC and 125/250 VAC resistive load; 1/14 HP (≈ 50 W) @ 125/250 VAC for inductive loads
Noise Suppression	Noise suppression is recommended for each relay contact switching inductive loads; see page 34 for details.
Initialization	After power failure, relays will initialize to default state before reconnecting to wireless units.
Power Consumption	2.56 W max @ 24 V Add to base station minimum power.
Fail-Safe Operation	Programmable and independent for each relay. Note: Relay coil is energized in non-alarm condition. In case of power failure, relay will go to alarm state.
Loss of Signal (RF)	If mapped to digital input channel, the relay goes to the state selected via the PDW Manager software. Active: Relay energizes Inactive: Relay de-energizes Stay as Is: State does not change

System Power Consumption Examples

Base Station	Analog Input*	Analog Output*	Digital I/O**	Relays*	Power (W)
2 Slots	0	2	0	0	4.9
2 Slots	1	1	0	0	6.8
6 Slots	2	2	1	1	10.9
6 Slots	0	4	0	2	16.8
16 Slots	5	5	2	4	27.8
16 Slots	0	8	4	4	33.6

*Modules with (2) I/O or (2) relays
*Modules with (4) digital I/O

PDW90 Field Unit

General

Display	32-character dual-line alphanumeric dot matrix LCD display with backlight Visual Area: 2.54" x 0.63" (64.6 x 16.0 mm) Character Height: 0.2" (5.5 mm) Display used for programming assistance and displaying communications link status, signal strength, values for the analog inputs and outputs, and status of digital inputs and outputs.
Network ID	Field selectable: 0 - 99
Peak Antenna Gain	1.8 dBi +/- 1.0
Programming Methods	Programming (complete): PC with PDW Manager software Programming (all but advanced): Four CapTouch through-glass buttons
Recalibration	All inputs and outputs are calibrated at the factory. Recalibration is recommended at least every 12 months.
Process/Digital I/O Display	Press the Next button once to display the present analog input and output. Press the Next button again to display digital I/O states.
Password	A programmable password restricts modification of program settings.
Power	9-30 VDC, 2.5 W max Note: If analog and digital outputs are off: 1.0 W min
Non-Volatile Memory	All programmed settings are stored in non-volatile memory for a minimum of ten years if power is lost.
Isolation	500 V
Environmental	Operating temp. range: -55 to 75°C (display inoperable < -20 °C) Storage temp. range: -55 to 85°C Relative humidity: 0 to 90% non-condensing Printed circuit boards are conformally coated
Connections	Removable screw terminal blocks accept 12 to 26 AWG wire.
Connectors Tightening Torque	4.5 lb-in (0.5 Nm)
Mounting	May be mounted directly to conduit. Built-in flange for 1.5" to 2" pipe or wall mounting. See manual for mounting space requirements.
Overall Dimensions	5.25" x 11.63" x 4.80" (133 mm x 295 mm x 122 mm) (W x H x D)
Weight	Aluminum: 5.6 lbs (2.5 kg) Stainless Steel: 9.8 lbs (4.4 kg)
Warranty	3 years parts and labor. See Warranty Information and Terms & Conditions on www.predig.com for complete details.

Enclosure

Material	-AL Models: ASTM A413 LM6 die-cast aluminum, copper-free, enamel coated -SS Models: ASTM A743 CF8M investment-cast 316 stainless steel
Gasket	Fluoroelastomer
Rating	NEMA 4X, IP68
Color	-AL: Blue; -SS: Silver
Window	Borosilicate glass
Conduits	Three ¾" NPT threaded conduit openings; One used for mounting the antenna (factory installed), the other two available for field wiring. M20 conduits are available.
Flange	Built-in flange for wall and pipe mounting.
Tamper-Proof Seal	Enclosure lid may be secured with tamper-proof seal.
Instrument Tag Loop	Built-in loop for securing stainless steel tag.

Analog Input

Field Selectable Input	4-20 mA, 0-10 V, 0-5 V, 1-5 V
Accuracy	±0.03% of calibrated span ±1 count
Temperature Drift	0.005% of calibrated span/°C max from 0 to 65°C ambient, 0.01% of calibrated span/°C max from -40 to 0°C ambient
Input Impedance	Voltage ranges: greater than 110 kΩ; Current ranges: less than 220 Ω
HART Transparency	HART signals will not transmit wirelessly. The 4-20 mA signal value will transmit normally (without any HART information) even if a HART signal is present. The analog input will not interfere with HART communications within the wired 4-20 mA loop.

Isolated 4-20 mA Transmitter Output

Output Source	Analog input from connected wireless unit
Calibration	Factory calibrated: 4.000 to 20.000 = 4-20 mA output
Accuracy	± 0.1% of span ± 0.004 mA
Loop Power Supply	Internally powered; no external supply needed
Temperature Drift	0.4 μA/°C max from 0 to 65°C ambient, 0.8 μA/°C max from -40 to 0°C ambient
Loss of Signal (RF)	After approximately 15 seconds of trying to reconnect, the Loss of Signal function will occur and result in the mA output going to the Link Lost Output value selected via the PDW Manager software (i.e. 3.2, 3.5, 3.8, 20.5, 20.8, 23.0 mA, or Stay as Is).
External Output Loop Resistance	Power supply	Minimum
	24 VDC	10 Ω

Digital Inputs / Outputs

Channels	(4) Four (discrete) digital I/O connections, independently field selectable as either inputs or outputs. A digital output can be used to indicate loss of wireless signal as described below.
DI Logic High	3 to 24 VDC (30 V tolerant)
DI Logic Low	0 to 1.1 VDC
DI Contact	Dry contact to ground can be used to activate the input (Active Low)
DO Logic High	3.0 to 5.0 VDC
DO Logic Low	0 to 0.5 VDC
Output Source Current	20 mA maximum output current
Input Sink Current	0.5 mA minimum input current
I/O Operation Configured with PDW Manager Active Low Digital Input: A closed dry contact from a digital input terminal to GND will result in a digital output high on the corresponding output pin of the other unit. Active High Digital Input: To reverse the output logic, deselect the corresponding digital input box in the PDW Manager software. An open circuit or a logic high at the input will result in a digital output high on the corresponding output pin of the other unit.

Loss of Signal (RF)

Connections	Terminals G and LS on the Digital I/O connector
Function	After approximately 15 seconds of trying to reconnect, the Loss of Signal function will occur and result in the Digital output going to the Link Lost Output state selected via the PDW Manager software. Active: Logic high (5 V) Inactive: Logic low (0 V) Stay as Is: State does not change

Optional Relays

Number of Relays	(2) Two Form A (SPST)
Rating	250 VAC @ 5 A resistive load 30 VDC @ 5 A resistive load
Rating	250 VAC @ 2 A inductive load 30 VDC @ 2 A inductive load
Relay Isolation (Dielectric Strength)	3,000 VAC, 50/60 Hz for 1 min
Noise Suppression	Metal oxide varistors across contacts
Relay Control	Relay coils are controlled by the digital outputs (e.g. DO-1 & DO-2)
The relays option module is sold separately, and it is installed on the base of the enclosure by the user.

Base Station and Field Unit

Wireless Radio

Frequency	900 MHz
Range	500 ft (152.4 m) indoor, 1 mi (1.61 km) outdoor (line-of-sight)
Encryption	AES 128-bit encryption available using PDW Manager software.
Interference Reduction	Frequency Hopping Spread Spectrum (FHSS)
Power Output	24 dBm (250 mW)
Sensitivity	-101 dBm

RS-485 Modbus^® RTU Serial Communications

The Modbus Client must be connected to the primary wireless unit.
Compatibility	EIA-485
Connectors	Removable screw terminal connector
Max Distance	3,937’ (1,200 m) max
Baud Rate	1200 – 57,600 bps
Data	8 bit (1 start bit, 2 stop bits)
Parity	Even, Odd, or None with 1 or 2 stop bits
Modbus Timeout	0.5, 1, 2, 3, 4, 5 seconds; user selectable
Isolation	1500 VRMS

PDW Manager Software

System Requirements	Microsoft® Windows® 10/11
Communications	USB 2.0 Base Station: Standard USB A to USB Type B Field Unit: Standard USB A to micro-USB Type B
Configuration	Configure the base station and the field units via the base station’s USB. Inputs on the base station are mapped to outputs on the selected field unit.
Compatibility	The PDW Manager v2.00 is compatible with firmware version 1.10; there is a possibility of issues in the GUI (Graphical User Interface), but it should not be a problem configuring the supported features.
Utility	Use to program all settings on base station and field units. Save configuration files for later use with similar systems, base station only.
Availability	Download from predig.com/pdwmanager

PDW Manager PC Programming Software

PDW Manager PC Software allows for programming the PDW90 wireless base station and field units from a PC with a USB connection. Field units connect to a PC via the USB connection on the electronic board behind the enclosure door. Use of PDW Manager is required for programming advanced settings such as wireless encryption and analog signal calibration. PDW Manager is available for download at www.predig.com/pdwmanager.

For more information visit www.predig.com/pdwmanager

Dimensions

Base Station Dimensions

2-Module Base Station Dimensions

6-Module Base Station Dimensions

16-Module Base Station Dimensions

Field Unit Dimensions

Enclosure & Antenna Dimensions -
Front View

Enclosure Dimensions - Top View

PDW30 Dimensions Side

Enclosure Dimensions - Side View

Base Station Connections

Base Station Sub Panel (Connector Boards)

The following diagrams show the locations of the field installable I/O module slots and screw terminal headers on the PDW90 base stations for 16, 6, and 2-module configurations. Also shown is the wireless antenna connection, USB cable port for PDW Manager programming software, Modbus and power terminals, and LCD display.

16-Module Base Station Sub Panel (Connector Board)

6-Module Base Station Sub Panel (Connector Board)

2-Module Base Station Sub Panel (Connector Board)

Base Station Wiring Diagrams

Power Connections

Power connections are made to a two-terminal connector labeled POWER.

Make sure that the power supply can provide between 9 and 30 VDC to the wireless device.

Dual Analog Input Connections

The analog input module can accept either 4-20 mA, 0-10 V, 0-5 V, or 1-5 V. The appropriate input type must be independently programmed for each input channel.

The analog input will not interfere with any existing HART signal on a 4-20 mA current loop. However, the HART signal will not be transmitted wirelessly.

Dual Analog Output Connections

The mA output module can be programmed to output a 4-20mA analog signal associated with a remote field unit’s analog input or Modbus register.

The signal can be transmitted to any device scaled to read a 4-20 mA signal as shown below. The analog output is internally powered; no external power supply is required.

PDW90 Base Station Dual Analog Output Connections

Four Digital I/O Connections

The digital I/O module includes four independently programmable I/O channels. All digital connections are referenced to ground; digital input connections have an internal pull-up resistor.

Note: Each connection may be set as either an input or an output. A digital output can be used to indicate loss of wireless signal.

In the diagram below, D3 is a digital input and D4 is a digital output.

PDW90 Base Station Digital I/O Connections

Dual Relays Output Connections

The relays module includes two mechanical relays. Relay connections are made to the six-terminal connector.

Each relay’s C terminal is common only to the normally open (NO) and normally closed (NC) contacts of the corresponding relay.

If a field unit’s digital input channel is mapped to a relay module channel on the base station, the effect may be opposite of what is expected. An open connection at the digital input will result in the relay going into an active state. This is because the digital input channels are active low. This can be changed by swapping the NO and NC connections to the relay channel.

PDW90 Base Station Dual Relays Output Connections

Switching Inductive Loads

The use of suppressors (snubbers) is strongly recommended when switching inductive loads to prevent disrupting the microprocessor’s operation. The suppressors also prolong the life of the relay contacts. Suppression can be obtained with resistor-capacitor (RC) networks assembled by the user or purchased as complete assemblies. Refer to the following circuits for RC network assembly and installation:

AC and DC Loads Protection

Choose R and C as follows:
R: 0.5 to 1 Ω for each volt across the contacts
C: 0.5 to 1 μF for each amp through closed contacts

Notes:

Use capacitors rated for 250 VAC.
RC networks may affect load release time of solenoid loads. Check to confirm proper operation.
Install the RC network at the device's relay screw terminals. An RC network may also be installed across the load. Experiment for best results.

Low Voltage DC Loads Protection

Use a diode with a reverse breakdown voltage two to three times the circuit voltage and forward current at least as large as the load current.

Modbus RTU Serial Communications

The PDW90 base station acts as a simple pass-through for Modbus communications. As such, multiple Modbus enabled devices may transmit and receive wirelessly using the base station.

Note: Modbus Client must be connected to Base Station.

Base Station Five-Wire RS-485 Modbus Connections

Base Station Three-Wire RS-485 Modbus Connections

Base Station Multiple Device RS-485 Modbus Connections

Notes:

Termination resistors are optional, and values depend on the cable length and characteristic impedance. Consult the cable manufacturer for recommendations.
Use shielded cable, twisted-pairs plus ground. Connect ground shield only at one location.

Field Unit Connections

Field Unit Connectors Labeling

The following diagrams show the locations of the connectors on the back of the display module and on the relays option module on the base of the enclosure.

PDW30 Dispay Module Connections

PDWM-2RY Relays Option Module Connections

• Use a flat screwdriver to loosen up the removable terminal blocks

Field Unit Wiring Diagrams

Power Connections

Power connections are made to a two-terminal connector labeled POWER. The field unit is reverse polarity protected; it will not be damaged if wired backward.

Make sure that the power supply can provide between 9 and 30 VDC to the wireless device.

Power Field Unit and 2-Wire Transmitter from Same Power Supply

The Field Unit may be powered from the same power supply that powers the 2-wire (loop-powered) transmitter, assuming that the supply provides enough voltage and current for both units. To power both devices from the same supply, wire the devices to the supply as shown below.

Power PDW30 and 2-Wire Transmitter from Same Power Supply

Input Signal Connections

The analog input may be either 4-20 mA, 0-10 V, 0 5 V, or 1-5 V. The appropriate input type must be programmed for each unit.

Once the appropriate input type has been programmed, wire the analog signal source to the device as shown in the diagram below.

The analog input will not interfere with any existing HART signal on a 4-20 mA current loop. However, the HART signal will not be transmitted wirelessly.

4-20 mA Output Connections

The 4-20 mA output corresponds with the analog input signal on the paired wireless device. The analog output signal is always 4-20 mA, regardless of the input type on the other wireless module.

For instance, if the analog input type on the first device was 0-10 V and the input value was 5 V, the second device would output 12 mA.

Connect the mA OUT terminals to a device scaled to read a 4-20 mA signal.

The analog output is internally powered; no external power supply is required.

Digital I/O Connections

All digital connections are referenced to ground. The base station I/O settings determine the I/O settings of the field units (e.g. if D1 of the base station is an input then it can only be mapped to a digital output of a field unit).

Note: Each connection may be set independently in the device settings as either an input or an output. In the diagram above, D4 & D3 are digital inputs and D2 is a digital output.

Loss of RF Signal Connections

The Loss of Signal terminal (LS) can be used to alert another device, such as a PLC, that the wireless signal has been lost. After approximately 15 seconds of trying to reconnect, the Loss of Signal function will occur and result in the Loss of Signal digital output going to the Link Lost Output state selected via the PDW Manager software.

Active: Logic high (5 V)
Inactive: Logic low (0 V)
Stay as Is: State does not change.

Relays Option Connections

The relays are controlled by the digital outputs on the display module so it is necessary to connect R1 and R2 terminals on the relays option module to digital outputs on the display module.

Note: Connections between relay control connection and relays are with traces on PCB.

Modbus RTU Serial Communications

The PDW30 acts as a simple pass-through for Modbus communications. As such, multiple Modbus enabled devices may be transmitted wirelessly using the PDW30 Wireless Bridge.

Note: Modbus Client must be connected to Base Station.

Five-Wire RS-485 Modbus Connections

Three-Wire RS-485 Modbus Connections

Multiple Device RS-485 Modbus Connections

Notes:

Termination resistors are optional, and values depend on the cable length and characteristic impedance. Consult the cable manufacturer for recommendations.
Use shielded cable, twisted-pairs plus ground. Connect ground shield only at one location.

Type A	Type B	Type C	Type D	Type E	Type F	Type G	Type H

PD690	PD542 PD543	PD603 PD644 PD743 PD765 PD6602 PD6603 PD6604 PD6606 PD6607 PD6608 PD6622 PD6624 PD6626 PD6628	PD138 PD154 PD158 PD520	PD6000 PD6001 PD6060 PD6080 PD6081 PD6088 PD6089 PD6100 PD6200 PD6210 PD6262 PD6300 PD6310 PD6363 PD6400 PD7000	PD530	PD510	PD420

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