PD6602/03/04 Loop Leader Process Meters

The Loop Leader PD6600 is a general-purpose, loop-powered, 1/8 DIN process meter. The four front panel buttons make setup and programming of the meter simple and intuitive. A dual-line display featuring five digits on the top line and eight digits on the bottom line, preprogrammed engineering units, and optional bargraph display (PD6604) or feet and inches display (PD6603) provide a clear and attractive presentation of the process. The units of measure can be changed as needed within a unit class (e.g. volume, temperature, pressure) without the need to re-scale the meter.

The dual-line display can be customized by the user to operate in such a way as to satisfy a specific application. Typically, the top line is used for the process variable while the bottom line is used for engineering units, custom tag, or process variable percentage of full scale. Three programmable function keys and a digital input come standard and allow the meter to be customized for use in specialized applications.

All models come equipped with two open collector outputs and are available with two solid state relays and a 4-20 mA analog output. These outputs can be programmed for alarm indication, signal retransmission via pulse or analog signal, pump control, and a number of other useful features.

The fact that this meter is loop-powered means that there is no need to run additional, costly power lines; the meter gets all of the power it needs from the 4-20 mA loop. The Loop Leader loop-powered process meter is built in a shallow-depth case with a IP65 front and features loop-powered backlighting and a wide -40 to 167°F (-40 to 75°C) operating temperature range. It doesn't matter if it's indoors or outdoors, in bright sunlight or a dimly lit plant, or in an area that is wet, dirty, hot, or cold, the Loop Leader can go just about anywhere.


Features

  • Loop-Powered Backlight with Red Backlight for Alarm Conditions
  • Loop-Powered Process Meter
  • 1.5 Volt Drop (4.7 Volt Drop w/ Backlight)
  • IP65 Front
  • -40 to 167°F (-40 to 75°C) Operating Temperature Range
  • Five Digit Top Line
  • Alphanumeric tag names
  • Dual Line Display
  • 1/8 DIN Shallow Depth Case
  • Optional Loop-Powered Solid State Relays
  • Optional 4-20 mA Analog Output
  • Open Collector Output Standard
  • Optional Bargraph Display (PD6604)
  • Timer functions for open collectors and relays
  • Relay pump alternation based on level and time
  • Relay runtime and cycle count
  • Multi-Point Linearization, Square Root, Programmable Exponent, and Round Horizontal Tank Input Conditioning Functions
  • Automatic units conversion for volume, height, temperature, pressure, weight, and rate

PD6603 Feet and Inches Level Meter with Bargraph

PD6603 Feet and Inches Level Meter with Bargraph

PD6604 Display with Bargraph Option

The Loop Leader offers not only the typical decimal display, but it offers another model with an added bargraph to provide a clear and attractive presentation of the process. This makes reading your process quick, convenient, and easy-to-understand.
PD6604 with Bargraph

Dual-Scale Display Feature

The Loop Leader has a very flexible dual-scale capability; a second scaled display can represent the measured input in a different form (i.e. gallons & height). This is of particular value in level applications. In the examples on the right, both displays are independently scaled based on the 4-20 mA input signal. Beyond level, this function has been used for pressure & force, current & power, feet & meters, GPM & CFM, and more.
Loop Leader Meters Showing Dual Scale Feature

Specifications

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

General

Display

Top: 0.7” (17.8 mm), Bottom: 0.4” (10.2 mm); 14-segment alphanumeric

PD6602 & PD6604: Top: 5 digits -9999 to 99999

PD6603: Top: 5 digits -99 ft. 11 in. 15/16 to 999 ft. 11 in. 15/16

Bottom: 8 digits -9,999,999 to 99,999,999

Bottom line separated by commas

Display Update Rate

Ambient > -10°C: 1 Update/Second

Ambient > -20°C: 1 Update/2 Seconds

Ambient  -40°C: 1 Update/10 Seconds

Overrange

PD6602 & PD6604: Top: 99999; Bottom: 99,999,999 (flashing)

PD6603: Top: 999 ft. 11 15/16 in.; Bottom: 99,999,999 (flashing)

Underrange

PD6602 & PD6604: Top: -9999; Bottom: -9,999,999 (flashing)

PD6603: Top: -99 ft. 11 15/16 in.; Bottom: -9,999,999 (flashing)

Programming Method

Front panel

Noise Filter

1, 2, 4, 8, 16 sec.

Noise Filter Bypass

0.1 to 99.9% FS

Recalibration

Recalibration is recommended at least every 12 months.

Max/Min
Display

Max/min readings reached by the process are stored until reset by the user or until power to the meter is turned off.

Password

Programmable password restricts modification of programmed settings.

Non-Volatile Memory

All programmed settings are stored in non-volatile memory for a minimum of ten years if power is lost.

Normal Mode Rejection

64 dB at 50/60 Hz

Environmental

Operating temperature range: -40 to 75°C
Storage temperature range: -40 to 85°C
Relative humidity: 0 to 90% non-condensing

Connections

Removable screw terminals accept 12 to 22 AWG wire

DI Digital Input Contacts

2.1 VDC on contact. Connect normally open contacts across DI+ to DI-

DI Digital Input Logic Levels

Logic High: 2.4 to 30 VDC (max)

Logic Low: 0 to 0.9 VDC

Enclosure &
Materials

1/8 DIN, high impact plastic, NORYL® Polyphenylene Ether & Polystyrene blend (PPE PS) Resin, UL 94V-0, color: gray

Gasket: Silicone Rubber

Faceplate: LEXAN® Polycarbonate (PC) Film

Buttons: Silicone rubber; Color: black

Mounting

1/8 DIN panel cutout required. Two panel mounting bracket assemblies provided

Tightening Torque

Screw terminal connectors: 4.5 lb-in (0.5 Nm)
Mounting screws: 8.0 lb-in max. (0.9 Nm)

Overall Dimensions

4.68" x 2.45" x 3.79" (119 mm x 62 mm x 96 mm) (W x H x D)

Weight

 8.7 oz (247g) w/ option board

Warranty

3 years parts and labor

Process Input

Accuracy

±0.02% of span ±1 count, Square root and programmable exponent: 10-100% FS

Function

PV1: Linear, square root*, or programmable exponent*

PV2: Linear or Round Horizontal Tank

*PD6602 & PD6604 Only

Low-Flow Cutoff

PD6602 & PD6604: 0.0 to 999,999.9

PD6603: 0 ft. 0 in. to 999 ft. 11 in. 15/16

Temperature Drift

25 PPM/°C from -40 to 75°C ambient

Decimal Point

Up to four decimal places: On top

Up to seven decimal places: On bottom

Scaling and Display Range

Input: 4-20 mA

Scaling Range: -999,999.9 to 999,999.9

Display Range: Top Line: -9999 to 99999; Bottom Line: -9,999,999 to 99,999,999

Voltage Drop

With backlight off: 1.5 V max

With backlight on: 4.7 V max

Equivalent Resistance

With backlight off: 75 Ω @ 20 mA

With backlight on: 225 Ω @ 20 mA

Input Overload

Over current protection to 1 A maximum

Open Collector Output

Rating

Two NPN, Isolated open collector, 30 VDC @ 90 mA maximum

Output Assignment

Pulse, Alarm, Timer, or Disable

Pulse Output Source

 PV (PV1, PV2) or Test Frequency

Pulse Output Factor

 0.000001 to 999,999.9

Pulse Width

2 ms; 50% duty cycle

Pulse Output Frequency

250 Hz maximum
0.1 Hz minimum

Quadrature Pulse Output

Available for Output 2 (90° behind Output 1)

Alarm Output Source

Assign to PV (PV1, PV2) or Digital Input

High or Low Alarm

User programmable for high or low alarm

Alarm Deadband

0-100% FS, user programmable

On & Off Time Delay

0 to 9,999 seconds

Fail-Safe Operation

Independent for each output

Alarm Operation

 Auto, Auto-man, Latch, Latch w/clear

Alarm Indication

 Red backlight, Flashing display, Alarm symbol (!)

Alarm Message

On or Off; User programmable, 8 characters maximum

Displayed every 10 sec for 1 sec on bottom

Alarm Acknowledge

Front panel ACK button or external digital input resets output and screen indication

Auto Initialization

When power is applied to the meter, relays will reflect the state of the input to the meter

Timer Output

One-shot or Continuous

Off Time Delay: 1 sec to 99:59:59 (hrs:min:sec)

On Time: 1 sec to 99:59:59 (hrs:min:sec)

Timer Start/Stop

Front panel or digital input, user selectable

Solid State Relays

Rating

Resistive Load: 250 VAC/DC @ 1 Amp

Inductive Load: 1/10 HP @ 125/250 VAC/DC

Noise Suppression

Metal oxide varistors across outputs

Relay Assignment

Alarm, Pump Control, Timer, or Disable

Pump Alternation Time: 0 to 999:59 (hrs:min)

Alarm Output Source

Assign to PV (PV1, PV2) or Digital Input

High or Low Alarm

User programmable for high or low alarm

Alarm Deadband

0-100% FS, user programmable

On & Off Time Delay

0 to 9,999 seconds

Fail-Safe Operation

Independent for each relay

Alarm Operation

Auto, Auto-man, Latch, Latch w/clear

Alarm Indication

Red backlight, Flashing display, Alarm Message, Alarm symbol (!)

Alarm Message

On or Off; User programmable, 8 characters maximum. Displayed every 10 sec for 1 sec on bottom

Alarm Acknowledge

Front panel ACK button or external digital input resets output and screen indication

Auto Initialization

When power is applied to the meter, relays will reflect the state of the input to the meter

Timer Output

One-shot or Continuous

Off Time Delay: 1 sec to 99:59:59 (hrs:min:sec)

On Time: 1 sec to 99:59:59 (hrs:min:sec)

Timer Start/Stop

Front panel or digital input, user selectable

4-20 mA Transmitter Output

Output Source

PV1, PV2, re-transmit; reverse scaling allowed

Scaling Range

1.00 to 23.0 mA

Disable

High impedance state, less than 1 mA

Calibration

Factory calibrated 4.00 to 20.00 mA

Underrange

1.0 mA, 3.5 mA, or 3.8 mA (If input < 3.5 mA), or Off; user selectable

Overrange

20.5 mA, 20.8 mA, or 23.0 mA (If input > 20.5 mA), or Off; user selectable

Isolation

500 V

Accuracy

±0.05% FS ±0.001mA

Temperature Drift

0.5 µA/°C max from -40 to 75°C ambient

External Loop Power Supply

7.0 VDC to 30.0 VDC maximum

Output Loop Resistance

10-750 Ω @ 24 VDC; 10-1100 Ω @ 30 VDC

Mounting Dimensions


Notes:
  1. Panel cutout required: 1.772" x 3.622" (45mm x 92mm)
  2. Panel thickness: 0.040 - 0.250" (1.0mm - 6.4mm)
  3. Mounting brackets lock in place for easy mounting
  4. Clearance: Allow 6" (152 mm) behind the panel

Applications

Pump Alternation

The following is an example application where relays 1 & 2 are programmed for pump alternation. Below, the graphics provide a visual representation of a typical pump alternation application:

Signal Input Conditioning

The PD6600 Loop Leader process meter allows you to select the signal input conditioner applied to the input: linear, square root, programmable exponent, or round horizontal tank volume calculation.

The programmable exponent function is used to linearize the level signal in open channel flow applications using weirs and flumes and display flow rate in engineering units.
The square root function can be used to linearize the signal from a differential pressure transmitter and display flow rate in engineering units.
The round horizontal tank linearization function automatically calculates the volume in a round horizontal tank with flat ends.

Digital Input

A digital input comes standard on the Loop Leader PD6600 Series. This allows the user to program an external button to activate certain functions immediately like alarm acknowledgement, display minimum/maximum values, tare the display, reset a value, and many more. This allows the Loop Leader to be greatly customized for use in specialized applications. See the PD6600 series manuals for all digital input functions.

Connections

Connectors Labeling

The connectors' label, affixed to the meter, shows the location of all connectors available with requested configuration.

Current Loop (4-20 mA) Connections

The following figures show a 4-20 mA current loop connected to the meter. The first figure shows the connection with the backlight disabled and the second shows the connection with the backlight enabled. The meter is powered by the 4-20 mA current loop.

Digital Input Connection

A digital input is standard on the meter. This digital input is connected with a normally open contact across DI+ and DI-, or with an active low signal applied to DI+.

4-20 mA Output Connections

Connections for the 4-20 mA transmitter output are made to the connector terminals labeled MA OUT. The 4-20 mA output must be powered from an external power supply.

Relay Connections

Relay connections are made to two four-terminal connectors. Each relay's C terminal is common only to the normally open (NO) contact of the corresponding relay.

Open Collector Outputs

Open collector output 1 and 2 connections are made to terminals labeled O1+ and O1-, and O2+ and O2-. Connect the alarm or pulse input device as shown below.

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Why you should buy:

  • Loop-Powered Process Meter
  • Bargraph or Feet & Inches Display (Optional)
  • 1/8 DIN Panel Mount
  • Open Collector Outputs Standard
  • Solid State Relays (Optional)
  • 4-20 mA Output (Optional)