1 Mile Line-of-Site / 500 Feet Indoor
Available in Stainless Steel
Display Module and Relays Option Module
Easy Snap-In Display Module
CapTouch Through-Glass Button Programming
Connected to PDW Manager PC Programming Software

Features

  • Signal Wire Replacement Bridge Consisting of a Matched Pair of Wireless Field Units
  • Virtually Plug and Play Right out of Box
  • Range: 1 Mile Line-of-Sight Outdoor, 500 Feet Indoor; Repeaters Available to Extend Range
  • Wireless Transmission Between Primary and Secondary Unit of
    ◦ 4-20 mA (Separate Signals Going Both Ways)
    ◦ Discrete (4 digital I/O Signals Going Both Ways)
    ◦ RS-485 Modbus
  • Inputs: (Wired to Units) 4-20 mA or 0-10 V (1), Discrete/Digital (up to 4), Modbus
  • Outputs: (Wired to Units) 4-20 mA (1), Discrete/Digital (up to 4), Relays (2, optional), Modbus
  • Loss of Signal (LoS) Digital Output
  • PDA10 Signal Strength Survey Tool to "Try Before You Buy"
  • Field Installable Relay Module with Two Form A (SPST) 5A Relays (Available for Both Units)
  • Simple to Configure Using PDW Manager Programming Software and On-Board USB
  • Backlit Display Provides Helpful Input & Output Information
  • CapTouch Through-Glass Button Programming for Non-Advanced Settings
  • Device Communication Secured by Enabling 128-bit AES Encryption
  • Password Protection
  • Remote Yagi Directional Antennas Available
  • IP68, NEMA 4X Aluminum & Stainless Steel Enclosures With Plenty of Room for Field Wiring
  • Operating Temperature Range: -55 to 75°C (-67 to 167°F)
  • Conformal Coated PCBs for Dust & Humidity Protection
  • Flange for Wall or Pipe Mounting; Loop for Stainless Steel Tag; Holes for Tamper-Proof Seal
  • Conformal Coated PCBs for Dust & Humidity Protection
  • 9-30 VDC Power
  • 3-Year Warranty

Overview

PDW30 Key Features Callouts

Connections

PDW30 Display Module Connections
PDW30 Dispay Module Connections
PDW30 Relays Option Module Connections
PDWM-2RY Relays Option Module Connections

Signal Wire Replacement Bridge for Industrial Wireless Applications

The Precision Digital PDW30 provides a simple, straightforward way to get an analog, discrete (digital) or Modbus signal from where you have it to where you need it – without having to run wires! It’s a point-to-point wireless bridge that is virtually plug and play right out of the box.

The PDW30 consists of a primary and a secondary unit and communication between the two is by-directional. That means you can send 4-20 mA, discrete and Modbus signals from the primary unit to the secondary unit and also send completely different 4-20 mA, discrete and Modbus signals from the secondary unit to the primary unit. For instance, the primary unit could send a 4-20 mA signal to the secondary unit corresponding to the level in a tank and the secondary unit could send a 4-20 mA signal to the primary unit to control a valve.

Primary and secondary 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, both units can be equipped with an optional, field installable, two relay module. These relays are rated Form A (SPST) 5A.

The specified range between the primary and secondary unit 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 PDW30 system does not work in your application, you can return it for full credit!

The PDW30 is available in either aluminum or stainless steel NEMA 4X, IP68 enclosures and these enclosures contain plenty of room for field wiring connections.

Most applications require minimal programming and can be operational in minutes. However, free programming software is available and if touch ups are needed after installation, the instrument can be programmed without removing the cover using CapTouch buttons.

A wide range of accessories, including mounting kits, antenna-related accessories, and repeaters are available. The antenna comes attached to the unit and can also be remotely located. High gain directional antennas are also offered.

Key Features

PDW Manager Software

PDW Manager PC Programming Software

PDW Manager PC Software allows for programming the PDW30 wireless primary units and secondary units from a PC with a USB connection. The units connect to a PC via the USB connection on the side of the display module behind the cover of the enclosure.

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.

CapTouch Through-Glass Buttons

CapTouch Through-Glass Buttons

The PDW30 primary and secondary 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.

Easy-To-Install Display Module

Easy-To-Install Display Module

The display module designed specifically for the PDW30 wireless units is easy to remove making it convenient for wiring the unit. The display module is completely enclosed for added protection when wiring and handling.

Relays Option Module

Relays Option Module

The PDW30 primary and secondary 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 makes wiring easy.

PDW30 Units Available in
Aluminum or Stainless Steel

PDW30 Units Available in Aluminum or Stainless Steel

The PDW30 primary and secondary 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 PDW30 units can operate in temperatures of -55 to 75°C (-67 to 167°F).

Wireless Solutions in Complex Areas

Wireless Solutions in Complex Areas

The PDW30 has a range of 500 ft. indoors and an outside line-of-sight range of 1 mile. Any wireless network can be negatively affected by certain factors, such as physical obstacles and improper equipment placement. Precision Digital sells several solutions for tricky wireless installations, such as remote antennas and repeater field units. Our PDA10 wireless survey kit allows for testing of the wireless signal strength prior to installation so that you know your wireless units will connect the first time.

Applications

Wireless Tank Level Monitoring

Wireless Tank Level Monitoring

Note: Power requirements / connections not shown in diagram. Consult manuals for details.

  • The 4-20 mA level transmitter is connected to the analog input of the secondary unit.
  • The mA signal is transmitted to the primary unit.
  • The primary unit's analog output is connected to a PD6602 loop-powered meter, which displays the 4-20 mA signal as volume in gallons.
  • 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 / horn in the field are driven as follows:
    ◦ Relay 1 (RY-1) in the PD6602 display is connected to digital input 1 (DI-1) on the primary unit. This signal is wirelessly transmitted to the secondary unit. (On the secondary 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 display is connected to digital input 2 (DI-2) on the primary unit. This signal is wirelessly transmitted to the secondary unit. (On the secondary 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:

PDW30

Model NumberQtyDescription
PDW30-GP-AL-PAIR1PDW30 Point-to-Point Wireless Bridge (Primary and Secondary Units), Aluminum Enclosure
PDWM-2RY1Relays Option Module, Two Form A (SPST)

Other Parts

Model NumberQtyDescription
PDA-LHR2Red Light / Horn
PD6602-L2N11/8 DIN Loop-Powered Digital Panel Meter with Two Relays

Wireless Tank Level Monitoring of Level Switches

Wireless Tank Level Monitoring of Level Switches

Note: Power requirements / connections not shown in diagram. Consult manuals for details.

  • The switch contacts from the two level switches in each tank are connected to the digital inputs on the secondary unit.
  • The states of the switch contacts are wirelessly transmitted to the primary unit.
  • The digital outputs from the primary unit are connected to a PD154 Vigilante II 4-point annunciator.



Parts Needed for This System:

PDW30

Model NumberQtyDescription
PDW30-GP-AL-PAIR1PDW30 Point-to-Point Wireless Bridge (Primary and Secondary Units), Aluminum Enclosure

Other Parts

Model NumberQtyDescription
PD154-6R2-111/8 DIN 4-Input Alarm Annunciator

Wireless Remote Valve Control

Wireless Remote Valve Control

Note: Power requirements / connections not shown in diagram. Consult manuals for details.

  • The level transmitter’s 4-20 mA signal is connected to the primary unit's analog input.
  • The PDW30 primary unit then wirelessly transmits the level signal to the secondary unit located in the control room, where the secondary unit’s 4-20 mA output duplicates the signal.
  • The secondary unit’s 4-20 mA output is connected to a PD6602 that displays the level and operates a high and low alarm. In this example, the meter is indicating a low alarm.
  • The operator uses a PD460 valve positioner to send a mA signal to the secondary unit's analog input.
  • That valve position signal is wirelessly transmitted to the primary unit located in the field at the tank, where the primary unit's 4-20 mA output duplicates the signal.
  • The primary 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 on the PD6602 and uses the PD460 valve positioner to close the valve when the tank reaches the desired level.



Parts Needed for This System:

PDW30

Model NumberQtyDescription
PDW30-GP-AL-PAIR1PDW30 Point-to-Point Wireless Bridge (Primary and Secondary Units), Aluminum Enclosure

Other Parts

Model NumberQtyDescription
PDA-LHR2Red Light / Horn
PD6602-L2N11/8 DIN Loop-Powered Digital Panel Meter with Two Relays
PD4601Panel Mount 4-20 mA Valve Positioner

Wireless Transmission of Modbus Inputs and Outputs

Wireless Transmission of Modbus Inputs and Outputs

Note: Power requirements / connections not shown in diagram. Consult manuals for details.

  • Tank level is measured by Modbus enabled level transmitters.
  • The ConsoliDator+ Modbus client is connected to the primary unit and sends requests to the level transmitters.
  • The ConsoliDator+ processes the data and displays it in engineering units.
  • The PD6730X Modbus scanners provide tank side indication of level, temperature, interface and other Modbus variables.
Warning
• The Modbus Client must be connected to the primary RS-485.



Parts Needed for This System:

PDW30

Model NumberQtyDescription
PDW30-GP-AL-PAIR1PDW30 Point-to-Point Wireless Bridge (Primary and Secondary Units), Aluminum Enclosure

Other Parts

Model NumberQtyDescription
PDA-LHR4Red Light / Horn
PD6730-AX0-I-23General Purpose Modbus Scanner for Tank Side Level Indication

Extending Signal Range with PDWR Repeaters

Extending Signal Range with PDWR Repeaters

Note: Power requirements / connections not shown in diagram. Consult manuals for details.

  • The 4-20 mA level transmitter is connected to the analog input of the secondary unit.
  • The mA signal is transmitted to the repeater unit and then retransmitted to the primary unit.
  • The primary unit's analog output is connected to a PD6602 loop-powered meter, which displays the 4-20 mA signal as volume in gallons.
  • 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 and transmits the signal to the secondary unit via the repeater unit.
  • The low and high alarm light / horns in the field are driven as follows:
    ◦ Relay 1 (RY-1) in the PD6602 display is connected to digital input 1 (DI-1) on the primary unit. This signal is wirelessly transmitted to the secondary unit via the PDWR repeater. (On the secondary 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 display is connected to digital input 2 (DI-2) on the primary unit. This signal is wirelessly transmitted to the secondary unit via the PDWR repeater. (On the secondary unit) digital output 2 (DO-2) controls relay 2 (RY-2), which turns on the low alarm light / horn, warning the operator.
Warning
• The Modbus Client must be connected to the primary RS-485.



Parts Needed for This System:

PDW30

Model NumberQtyDescription
PDW30-GP-AL-PAIR1PDW30 Point-to-Point Wireless Bridge (Primary and Secondary Units), Aluminum Enclosure
PDWR-GP-AL-REP1PDWR Repeater to Extend Wireless Distance, Aluminum Enclosure
PDWM-2RY1Relays Option Module, Two Form A (SPST)

Other Parts

Model NumberQtyDescription
PDA-LHR2Red Light / Horn
PD6602-L2N11/8 DIN Loop-Powered Digital Panel Meter with Two Relays

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

General

SystemPDW30 consists of a Primary and Secondary unit with built-in antennas.
Display32-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 IDField selectable: 0 - 99
Peak Antenna Gain1.8 dBi +/- 1.0
Programming MethodsProgramming (complete): PC with PDW Manager software
Programming (all but advanced): Four CapTouch through-glass buttons
RecalibrationAll inputs and outputs are calibrated at the factory.
Recalibration is recommended at least every 12 months.
Process/Digital I/O DisplayPress the Next button once to display the present analog input and output. Press the Next button again to display digital I/O states.
PasswordA programmable password restricts modification of program settings.
Input Power9-30 VDC, 2.5 W max
Note: If analog and digital outputs are off: 1.0 W min
Non-Volatile MemoryAll programmed settings are stored in non-volatile memory for a minimum of ten years if power is lost.
Isolation500 V
EnvironmentalOperating 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
ConnectionsRemovable screw terminal blocks accept 12 to 26 AWG wire.
Connectors Tightening Torque4.5 lb-in (0.5 Nm)
MountingMay be mounted directly to conduit. Built-in flange for 1.5" to 2" pipe or wall mounting. See manual for mounting space requirements.
Overall Dimensions5.25" x 11.63" x 4.80"
(133 mm x 295 mm x 122 mm)
(W x H x D)
WeightAluminum: 5.6 lbs (2.5 kg)
Stainless Steel: 9.8 lbs (4.4 kg)
Warranty3 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
GasketFluoroelastomer
RatingNEMA 4X, IP68
Color-AL: Blue; -SS: Silver
WindowBorosilicate glass
ConduitsThree ¾" NPT threaded conduit openings; One used for mounting the antenna (factory installed), the other two available for field wiring. M20 conduits are available.
FlangeBuilt-in flange for wall and pipe mounting.
Tamper-Proof SealEnclosure lid may be secured with tamper-proof seal.
Instrument Tag LoopBuilt-in loop for securing stainless steel tag.

Analog Input

Field Selectable Input4-20 mA, 0-10 V, 0-5 V, 1-5 V
Accuracy±0.03% of calibrated span ±1 count
Temperature Drift0.005% 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 ImpedanceVoltage ranges: greater than 110 kΩ;
Current ranges: less than 220 Ω
HART TransparencyHART 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 SourceAnalog input from connected wireless unit
CalibrationFactory calibrated: 4.000 to 20.000 = 4-20 mA output
Accuracy± 0.1% of span ± 0.004 mA
Loop Power SupplyInternally powered; no external supply needed
Temperature Drift0.4 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 ResistancePower supplyMinimum
24 VDC10 Ω

Digital Inputs / Outputs

Channels(4) Four (discrete) digital I/O connections, independently field selectable as either inputs or outputs.
DI Logic High3 to 24 VDC (30 V tolerant)
DI Logic Low0 to 1.1 VDC
DI ContactDry contact to ground can be used to activate the input (Active Low)
DO Logic High3.0 to 5.0 VDC
DO Logic Low0 to 0.5 VDC
Output Source Current20 mA maximum output current
Input Sink Current0.5 mA minimum input current
Important 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)

ConnectionsTerminals G and LS on the Digital I/O connector
FunctionAfter 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)
Rating250 VAC @ 5 A resistive load
30 VDC @ 5 A resistive load
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 SuppressionMetal oxide varistors across contacts
Relay ControlRelay coils are controlled by the digital outputs (e.g. DO-1 & DO-2)
Important
  • The relays option module is sold separately, and it is installed on the base of the enclosure by the user.

Wireless Radio

Frequency900 MHz
Range500 ft (152.4 m) indoor,
1 mi (1.61 km) outdoor (line-of-sight)
EncryptionAES 128-bit encryption available using PDW Manager software.
Interference ReductionFrequency Hopping Spread Spectrum (FHSS)
Power Output24 dBm (250 mW)
Sensitivity-101 dBm

RS-485 Modbus® RTU Serial Communications

Important
  • The Modbus Client must be connected to the primary wireless unit.
CompatibilityEIA-485
ConnectorsRemovable screw terminal connector
Max Distance3,937’ (1,200 m) max
Baud Rate1200 – 57,600 bps
Data8 bit (1 start bit, 2 stop bits)
ParityEven, Odd, or None with 1 or 2 stop bits
Modbus Timeout0.5, 1, 2, 3, 4, 5 seconds; user selectable
Isolation1500 VRMS

PDW Manager Software

System RequirementsMicrosoft® Windows® 10/11
CommunicationsUSB 2.0; Micro-USB Type B
ConfigurationConfigure devices one at a time. Analog inputs on the primary unit are automatically configured as outputs on the corresponding secondary unit.
CompatibilityThe 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.
AvailabilityDownload from predig.com/pdwmanager

PDW Manager PC Programming Software

PDW Manager allows you to program the PDW30 wireless units from a PC with a USB connection. Units connect to a PC via the micro USB connection on the side of the electronics module, underneath the enclosure cover. Use of PDW Manager is required for programming advanced settings such as digital I/O logic (high or low), loss of signal (LoS) digital output state or analog output value, wireless encryption, and analog signal calibration. PDW Manager is available for download at www.predig.com/pdwmanager.

MeterView XL Software
For more information visit www.predig.com/pdwmanager

Dimensions

PDW30 Dimensions Front
Enclosure & Antenna Dimensions -
Front View


PDW30 Dimensions TopEnclosure Dimensions - Top View

PDW30 Dimensions SideEnclosure Dimensions - Side View

Connections

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 Display Module Connections
PDW30 Dispay Module Connections
PDW30 Relays Option Module Connections
PDWM-2RY Relays Option Module Connections
Warning
• Use a flat screwdriver to loosen up the removable terminal blocks

Wiring Diagrams

Power Connections

Power connections are made to a two-terminal connector labeled POWER. The PDW30 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.

PDW30 Power Connections

Power PDW30 and 2-Wire Transmitter from Same Power Supply

The PDW30 wireless units 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.

Input Signal Connections

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 device.

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.

4-20 mA Output Connections

Digital I/O Connections

All digital connections are referenced to ground. The primary unit digital I/O settings determine the settings of the secondary unit (e.g. if D1 of the primary unit is an input then D1 of the secondary unit is an output).

Digital I/O Connections

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.

Loss of RF Signal Connections

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.

Relays Option Connections

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 Primary Wireless Unit.
Five-Wire RS-485 Modbus Connections

Five-Wire RS-485 Modbus Connections

Three-Wire RS-485 Modbus Connections

Three-Wire RS-485 Modbus Connections

Multiple Device RS-485 Modbus Connections


Multiple Device RS-485 Modbus Connections

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

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