APG DDD Operating Manual

Din Mounted Digital Display

Instruction Manual

®

Digital Panel Meter

• 0-20 mA, 4-20 mA, 0-5 V, 1-5 V, and ±10 V Inputs

• Multi-Pump Alternation Control

• Display One Input in Two Different Scales (e.g. Height & Volume)

• Signal Input Conditioning for Flow & Round Horizontal Tank

• 32-Point, Square Root, or Exponential Linearization

• Dual-Line Display

• NEMA 4X and IP65 Rated Front Panel

• UL Listed & CE Marked

• Display Features 0.6" & 0.46" Digits

• Six Full Digits on Each Line

• Optional Superluminous Sunlight Readable Display

• Free USB Programming Software & Cable

• 2 or 4 Relays + Isolated 4-20 mA Output Options

• USB, RS-232, & RS-485 Serial Communication Options

• External 4-Relay & Digital I/O Expansion Modules

• Input Power Options Include 85-265 VAC or 12-24 VDC

• Isolated 24 VDC @ 200 mA Transmitter Power Supply

• Modbus® RTU Communication Protocol Standard

Automation Products Group

1025 W 1700 N • Logan UT 84321 USA
Tel [phone] • Fax [phone]

www.apgsensors.com

Din Mounted Digital Display Instruction Manual

CAUTION: Read complete

instructions prior to

installation and operation

of the meter.

WARNING: Risk of

electric shock or

personal injury.

Warning!

This product is not recommended for life support
applications or applications where malfunctioning could
result in personal injury or property loss. Anyone using this
product for such applications does so at his/her own risk.
Automation Products Group, Inc. shall not be held liable for
damages resulting from such improper use.

!

Disclaimer

The information contained in this document is subject to change without notice.
Automation Products Group makes no representations or warranties with respect to
the contents hereof and specifically disclaims any implied warranties of
merchantability or fitness for a particular purpose.

Limited Warranty

Automation Products Group, Inc. warrants this product against defects in material or
workmanship for the specified period under “Specifications” from the date of
shipment from the factory. Automation Products Group’s liability under this limited
warranty shall not exceed the purchase value, repair, or replacement of the defective
unit.

Registered Trademarks

Modbus® is a Registered Trademark of Schneider Automation Inc. All other
trademarks mentioned in this document are the property of their respective owners.

© 2018 Automation Products Group, Inc. All rights reserved.

www.apgsensors.com

2

Din Mounted Digital Display Instruction Manual

Table of Contents

Table of Contents ----------------------------------------- 3
Table of Figures ------------------------------------------- 4
Introduction ------------------------------------------------- 4
Ordering Information ------------------------------------ 5
Specifications ---------------------------------------------- 6

General --------------------------------------------------------------- 6
Process Input ------------------------------------------------------- 6
Relays ----------------------------------------------------------------- 7
Isolated 4-20 mA Transmitter Output ----------------------- 7
Modbus® RTU Serial Communications -------------------- 7
MeterView Pro ------------------------------------------------------ 7

Compliance Information -------------------------------- 8

Safety------------------------------------------------------------------ 8
Electromagnetic Compatibility ------------------------------- 8

Safety Information ---------------------------------------- 9
Installation -------------------------------------------------- 9

Unpacking ----------------------------------------------------------- 9
Panel Mounting Instructions ---------------------------------- 9

Mounting Dimensions ----------------------------------------- 10

Transmitter Supply Voltage Selection (P+, P-) -------- 10
Connections ------------------------------------------------------ 11

Connectors Labeling ------------------------------------------ 11
Power Connections-------------------------------------------- 11
Signal Connections -------------------------------------------- 12
Modbus RTU Serial Communications -------------------- 13
Relay Connections -------------------------------------------- 13
Switching Inductive Loads ----------------------------------- 13
F4 Digital Input Connections -------------------------------- 14
4-20 mA Output Connections ------------------------------- 14
Analog Output Transmitter Power Supply --------------- 14
External Relays & Digital I/O Connections -------------- 15
Interlock Relay Feature--------------------------------------- 15

Setup and Programming------------------------------ 16

Overview ----------------------------------------------------------- 16
Front Panel Buttons and Status LED Indicators ------ 16
MeterView® Pro Software ------------------------------------- 17

MeterView Pro Installation ----------------------------------- 17

Display Functions & Messages----------------------------- 18
Main Menu --------------------------------------------------------- 19
Setting Numeric Values --------------------------------------- 19
Setting Up the Meter (setup) -------------------------------- 20

Setting the Input Signal (Input) --------------------------- 20
Setting the Input Units or Custom Tags (units) ------- 21
Setting the Decimal Point (dEc pt) ----------------------- 21
Programming the Meter (prog) ----------------------------- 22
Setting the Display Parameter & Intensity (dsplay) -- 25

Setting the Relay Operation (relay) ---------------------- 26

Setting the Relay Action ------------------------------------- 26
Programming Set and Reset Points----------------------- 26
Setting Fail-Safe Operation --------------------------------- 27
Programming Time Delay------------------------------------ 27
Relay Action for Loss of 4-20 mA Input (Loop Break) 27

Relay and Alarm Operation Diagrams ------------------- 27

High Alarm Operation (Set > Reset) ---------------------- 27
Low Alarm Operation (Set < Reset)----------------------- 27
High Alarm with Fail-Safe Operation (Set > Reset) --- 28
Low Alarm with Fail-Safe Operation (Set < Reset) ---- 28
Pump Alternation Control Operation ---------------------- 29
Relay Sampling Operation ---------------------------------- 29
Signal Loss or Loop Break Relay Operation ------------ 30
Time Delay Operation ---------------------------------------- 30

Relay Operation Details --------------------------------------- 31

Overview --------------------------------------------------------- 31
Relays Auto Initialization ------------------------------------- 31
Fail-Safe Operation ------------------------------------------- 31
Front Panel LEDs ---------------------------------------------- 31
Latching and Non-Latching Relay Operation ----------- 32
Non-Latching Relay (Auto)---------------------------------- 32
Non-Latching Relay (A-man) ----------------------------- 32
Latching Relay (LatcH) -------------------------------------- 32
Latching Relay (Lt-Clr) ------------------------------------- 32
Acknowledging Relays --------------------------------------- 33
Pump Alternation Control Applications (Altern) ------ 33
Setting Up the Interlock Relay (Force On) Feature --- 35

Scaling the 4-20 mA Analog Output (Aout) ------------- 35
Reset Menu (reset) -------------------------------------------- 36
Control Menu (Contrl) ---------------------------------------- 36
Setting Up the Password (pass)---------------------------- 36

Protecting or Locking the Meter ---------------------------- 36
Making Changes to a Password Protected Meter ----- 37
Disabling Password Protection ----------------------------- 37

Advanced Features Menu ------------------------------------ 38

Advanced Features Menu & Display Messages ------- 38
Noise Filter (filter) ----------------------------------------- 39
Noise Filter Bypass (bypass) ------------------------------- 39
Rounding Feature (round) ---------------------------------- 39
Modbus RTU Serial Communications (serial) ------- 40
Select Menu (SElect) ---------------------------------------- 40
Signal Input Conditioning (Functn) ----------------------- 41
Low-Flow Cutoff (CutofF) ----------------------------------- 42
Analog Output Programming (AoutPr) ------------------- 42
Programmable Function Keys User Menu (user) ----- 42
Tare (tare) ------------------------------------------------------ 43
Internal Source Calibration (ICAL) ------------------------ 44

Meter Operation ------------------------------------------ 45

Front Panel Buttons Operation ----------------------------- 45
Function Keys Operation ------------------------------------- 45
F4 Operation ------------------------------------------------------ 45
Maximum/Minimum Readings ------------------------------ 45

Troubleshooting ----------------------------------------- 46

Diagnostics Menu (diag) ------------------------------------- 46

Determining Software Version ----------------------------- 46

Reset Meter to Factory Defaults --------------------------- 46

Factory Defaults & User Settings -------------------------- 47

Troubleshooting Tips ------------------------------------------ 48

EU Declaration of Conformity ----------------------- 49

3

Din Mounted Digital Display Instruction Manual

Table of Figures

Figure 1. 1/8 DIN Panel Cutout Dimensions ................... 9

Figure 2. Panel Mounting Details .................................... 9

Figure 3. Meter Dimensions - Side View ....................... 10

Figure 4. Meter Dimensions - Top View ........................ 10

Figure 5. Transmitter Supply Voltage Selection ............ 10

Figure 6. Connector Labeling for Fully Loaded Meter ... 11

Figure 7. Power Connections ........................................ 11

Figure 8. Transmitters Powered by Internal Supply ...... 12

Figure 9. Transmitter Powered by Ext. Supply or Self-

Powered ................................................................ 12

Figure 10. Voltage Input Connections ........................... 12

Figure 11. Relay Connections ........................................ 13

Figure 12. AC and DC Loads Protection ........................ 13

Figure 13. Low Voltage DC Loads Protection ................ 13

Figure 14. F4 Digital Input Connections ......................... 14

Figure 15. 4-20 mA Output Connections........................ 14

Figure 16. Expansion Modules & DIN Rail Mounting Kit 15

Figure 17. External Relays Module Connections ........... 15

Figure 18. Digital I/O Module Connections .................... 15

Figure 19. Interlock Connections ................................... 15

Figure 20. Acknowledge Relays w/Function Key or Digital

Input ....................................................................... 33

Introduction

This analog input process meter is a multi-purpose, easy-to-use digital process meter ideal for
level, flow rate, temperature, or pressure transmitter applications. Its superluminous LED digits
make it easily readable in smoke, dust, fog, and, with the optional sunlight readable display,
even direct sunlight. It accepts current and voltage signals (e.g. 4-20 mA, 0-10 V). Three of the
front panel buttons can be custom-programmed for a specific operation. The analog input can
be scaled to display the process in two different scales; for example, the main display could
indicate level in feet and the second display could indicate the volume in gallons.

The basic model includes an isolated 24 VDC transmitter power supply that can be used to
power the input transmitter or other devices. An additional isolated 24 VDC power supply is
included with the 4-20 mA output option. A digital input is standard.

A fully loaded meter has the following: four SPDT relays, 4-20 mA output, and two 24 VDC power
supplies. The meter’s capabilities may be enhanced by adding the following external expansion
modules: four SPST relays (creating an eight-relay process meter), two digital I/O modules with
four inputs and four outputs each, and USB, RS-232 or RS-485 communication adapters.

The eight relays can be used for alarm indication or process control applications such as pump
alternation control. The 4-20 mA isolated output, Modbus RTU serial communications, and digital
I/O options make this meter an excellent addition to any system.

4

Din Mounted Digital Display Instruction Manual

Model Number

Reorder Number

Power

Options

PD6000-6R0-AP

DDD-A00

85-265 VAC

No options

PD6000-6R2-AP

DDD-A02

85-265 VAC

2 relays

PD6000-6R3-AP

DDD-A10

85-265 VAC

4-20 mA output

PD6000-6R4-AP

DDD-A04

85-265 VAC

4 relays

PD6000-6R5-AP

DDD-A12

85-265 VAC

2 relays & 4-20 mA output

PD6000-6R7-AP

DDD-A14

85-265 VAC

4 relays & 4-20 mA output

PD6000-7R0-AP

DDD-D00

12-24 VDC

No options

PD6000-7R2-AP

DDD-D02

12-24 VDC

2 relays

PD6000-7R3-AP

DDD-D10

12-24 VDC

4-20 mA output

PD6000-7R4-AP

DDD-D04

12-24 VDC

4 relays

PD6000-7R5-AP

DDD-D12

12-24 VDC

2 relays & 4-20 mA output

PD6000-7R7-AP

DDD-D14

12-24 VDC

4 relays & 4-20 mA output

Model Number

Reorder Number

Power

Options

PD6000-6H0-AP

DBD-A00

85-265 VAC

No options

PD6000-6H2-AP

DBD-A02

85-265 VAC

2 relays

PD6000-6H3-AP

DBD-A10

85-265 VAC

4-20 mA output

PD6000-6H4-AP

DBD-A04

85-265 VAC

4 relays

PD6000-6H5-AP

DBD-A12

85-265 VAC

2 relays & 4-20 mA output

PD6000-6H7-AP

DBD-A14

85-265 VAC

4 relays & 4-20 mA output

PD6000-7H0-AP

DBD-D00

12-24 VDC

No options

PD6000-7H2-AP

DBD-D02

12-24 VDC

2 relays

PD6000-7H3-AP

DBD-D10

12-24 VDC

4-20 mA output

PD6000-7H4-AP

DBD-D04

12-24 VDC

4 relays

PD6000-7H5-AP

DBD-D12

12-24 VDC

2 relays & 4-20 mA output

PD6000-7H7-AP

DBD-D14

12-24 VDC

4 relays & 4-20 mA output

Model Number

Description

PDA1002

DIN rail mounting kit for two expansion modules

PDA1004

4 SPST (Form A) relays

PDA1044

4 digital inputs & 4 digital outputs (2 may be connected)

PDA1232

RS-232 serial adapter

PDA1485

RS-485 serial adapter

PDA7485-I

RS-232 to RS-422/485 isolated converter

PDA7485-N

RS-232 to RS-422/485 non-isolated converter

PDA8232-N

USB to RS-232 non-isolated converter

PDA8485-I

USB to RS-422/485 isolated converter

PDA8485-N

USB to RS-422/485 non-isolated converter

PDX6901

Suppressor (snubber): 0.01 µF/470 , 250 VAC

Ordering Information

Standard Models

Sunlight Readable Display Models

Accessories

Manufactured by Precision Digital Corporation, 233 South St, Hopkinton MA 01748 USA

5

Din Mounted Digital Display Instruction Manual

Display

Line 1: 0.60" (15 mm) high, red LEDs
Line 2: 0.46" (12 mm) high, red LEDs
6 digits each (-99999 to 999999), with lead zero
blanking

Display
Intensity

Eight user selectable intensity levels

Display
Update Rate

5/second (200 ms)

Overrange

Display flashes 999999

Underrange

Display flashes -99999

Display
Assignment

Display lines 1 and 2 may be assigned to PV1,
PV2, PCT, d r-u, d gross, d nt-g, max/min, max
& min, set points, units (display line 2 only), or
Modbus input.

Programming
Methods

Four front panel buttons, digital inputs, PC and
MeterView Pro software, or Modbus registers.

Noise Filter

Programmable from 2 to 199 (0 will disable filter)

Filter Bypass

Programmable from 0.1 to 99.9% of calibrated
span

Recalibration

All ranges are calibrated at the factory.
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

Three programmable passwords restrict
modification of programmed settings.
Pass 1: Allows use of function keys and digital
inputs
Pass 2: Allows use of function keys, digital
inputs and editing set/reset points
Pass 3: Restricts all programming, function keys,
and digital inputs.

Power
Options

85-265 VAC 50/60 Hz, 90-265 VDC, 20 W max
or 12-24 VDC  10%, 15 W max
Powered over USB for configuration only.

Isolated
Transmitter
Power Supply

Terminals P+ & P-: 24 VDC  10%. 12-24 VDC
powered models selectable for 24, 10, or 5 VDC
supply (internal jumper J4).

85-265 VAC models rated @ 200 mA max, 12-24
VDC powered models rated @ 100 mA max, @ 50
mA max for 5 or 10 VDC supply.

Non-Volatile
Memory

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

Fuse

Required external fuse: UL Recognized, 5 A
max, slow blow; up to 6 meters may share one 5
A fuse

Normal Mode
Rejection

Greater than 60 dB at 50/60 Hz

Isolation

4 kV input/output-to-power line
500 V input-to-output or output-to-P+ supply

Overvoltage
Category

Installation Overvoltage Category II:
Local level with smaller transient overvoltages
than Installation Overvoltage Category III.

Environmental

Operating temperature range: -40 to 65°C
Storage temperature range: -40 to 85°C
Relative humidity: 0 to 90% non-condensing

Connections

Removable screw terminal blocks accept 12 to
22 AWG wire, RJ45 for external relays, digital
I/O, and serial communication adapters.

Enclosure

1/8 DIN, high impact plastic, UL 94V-0, color:
black

Mounting

1/8 DIN panel cutout required:

3.622" x 1.772" (92 mm x 45 mm)
Two panel mounting bracket assemblies are
provided.

Tightening
Torque

Screw terminal connectors: 5 lb-in (0.56 Nm)

Overall
Dimensions

4.68" x 2.45" x 5.64" (119 mm x 62 mm x 143
mm)
(W x H x D)

Weight

9.5 oz (269 g)

Warranty

Please see https://www.apgsensors.com/about­us/terms-conditions for full warranty statement.

Inputs

Field selectable:
0-20, 4-20 mA, 10 V (0-5, 1-5, 0-10 V), Modbus
PV (Slave)

Accuracy

±0.03% of calibrated span ±1 count,
square root & programmable exponent accuracy
range: 10-100% of calibrated span

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

Signal Input
Conditioning

Linear, square root, programmable exponent, or
round horizontal tank volume calculation

Multi-Point
Linearization

2 to 32 points for PV or PV1
2 to 8 points for PV2 (Dual-scale Level feature)

Programmable
Exponent

1.0001 to 2.9999

Round H Tank

Diameter & Length: 999.999 inch or cm
calculates volume in gallons or liters
respectively.

Low-Flow
Cutoff

0-999999 (0 disables cutoff function)

Decimal Point

Up to five decimal places or none:

d.ddddd, d.dddd, d.ddd, d.dd, d.d, or
dddddd

Calibration
Range

Input Range

Minimum Span
Input 1 & Input 2

4-20 mA

0.15 mA

10 V

0.01 V

An error message will appear if the input 1 and
input 2 signals are too close together.

Input
Impedance

Voltage ranges: greater than 500 k
Current ranges: 50 - 100  (depending on resettable

fuse impedance)

Input
Overload

Current input protected by resettable fuse, 30
VDC max.
Fuse resets automatically after fault is removed.

F4 Digital Input
Contacts

3.3 VDC on contact. Connect normally open
contacts across F4 to COM.

Specifications

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

General

Process Input

6

Din Mounted Digital Display Instruction Manual

F4 Digital Input
Logic Levels

Logic High: 3 to 5 VDC
Logic Low: 0 to 1.25 VDC

Rating

2 or 4 SPDT (Form C) internal and/or 4 SPST
(Form A) external; 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 13 for details.

Deadband

0-100% of span, user programmable

High or Low
Alarm

User may program any alarm for high or low trip
point.
Unused alarm LEDs and relays may be disabled
(turn off).

Relay
Operation

Automatic (non-latching) and/or manual reset
Latching (requires manual acknowledge)
with/without clear
Pump alternation control (2 to 8 relays)
Sampling (based on time)
Off (disable unused relays and enable Interlock
feature)
Manual on/off control mode

Relay Reset

User selectable via front panel buttons or digital
inputs

1. Automatic reset only (non-latching), when
the input passes the reset point.

2. Automatic + manual reset at any time (non­latching)

3. Manual reset only, at any time (latching)

4. Manual reset only after alarm condition has
cleared (latching)

Note: Front panel button or digital input may be

assigned to acknowledge relays
programmed for manual reset.

Time Delay

0 to 999.9 seconds, on & off relay time delays
Programmable and independent for each relay

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.

Auto
Initialization

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

Output Source

Process variable (PV), max, min, set points 1-8,
Modbus input, or manual control mode

Scaling Range

1.000 to 23.000 mA for any display range

Calibration

Factory calibrated: 4.000 to 20.000 = 4-20 mA
output

Analog Out
Programming

23.000 mA maximum for all parameters:

Overrange, underrange, max, min, and break

Accuracy

± 0.1% of span ± 0.004 mA

Temperature
Drift

0.4 µA/C max from 0 to 65C ambient,

0.8 µA/C max from -40 to 0C ambient

Note: Analog output drift is separate from input drift.

Isolated
Transmitter
Power Supply

Terminals I+ & R: 24 VDC  10%. May be used to
power the 4-20 mA output or other devices.
Refer to Transmitter Supply Voltage Selection
(P+, P-) on page 10. All models rated @ 40 mA
max.

External Loop
Power Supply

35 VDC maximum

Output Loop
Resistance

Power supply

Minimum

Maximum

24 VDC

10 

700 

35 VDC
(external)

100 

1200 

Slave Id

1 – 247 (Meter address)

Baud Rate

300 – 19,200 bps

Transmit
Time Delay

Programmable between 0 and 199 ms

Data

8 bit (1 start bit, 1 or 2 stop bits)

Parity

Even, Odd, or None with 1 or 2 stop bits

Byte-To-Byte
Timeout

0.01 – 2.54 second

Turn Around
Delay

Less than 2 ms (fixed)

Note: Refer to the Modbus Register Tables located at
www.apgsensors.com for details.

System
Requirements

Microsoft® Windows® XP/Vista/7/8/10

Communications

USB 2.0 (Standard USB A to Micro USB B)

Configuration

Configure meters one at a time

Relays

Isolated 4-20 mA Transmitter Output

Modbus® RTU Serial Communications

MeterView Pro

7

Din Mounted Digital Display Instruction Manual

UL & C-UL Listed

USA & Canada
UL 508 Industrial Control Equipment

UL File Number

E160849

Front Panel

UL Type 4X, NEMA 4X, IP65; panel gasket provided

Low Voltage Directive

EN 61010-1:2010
Safety requirements for measurement, control, and laboratory use

Emissions

EN 55022:2010
Class A ITE emissions requirements

Radiated Emissions

Class A

AC Mains Conducted
Emissions

Class A

Immunity

EN 61326-1:2013
Measurement, control, and laboratory equipment
EN 61000-6-2:2005
EMC heavy industrial generic immunity standard

RFI - Amplitude
Modulated

80 -1000 MHz 10 V/m 80% AM (1 kHz)

1.4 - 2.0 GHz 3 V/m 80% AM (1 kHz)

2.0 - 2.7 GHz 1 V/m 80% AM (1 kHz)

Electrical Fast
Transients

±2kV AC mains, ±1kV other

Electrostatic
Discharge

±4kV contact, ±8kV air

RFI - Conducted

10V, 0.15-80 MHz, 1kHz 80% AM

AC Surge

±2kV Common, ±1kV Differential

Surge

1KV (CM)

Power-Frequency
Magnetic Field

30 A/m 70%V for 0.5 period

Voltage Dips

40%V for 5 & 50 periods
70%V for 25 periods

Voltage Interruptions

<5%V for 250 periods

Compliance Information

Safety

Electromagnetic Compatibility

Note:

Testing was conducted on meters installed through the covers of grounded metal enclosures with
cable shields grounded at the point of entry representing installations designed to optimize EMC
performance.

Declaration of Conformity available at www.apgsensors.com

8

Din Mounted Digital Display Instruction Manual

CAUTION: Read complete

instructions prior to installation

and operation of the meter.

WARNING: Risk of electric

shock or personal injury.

Warning!

Hazardous voltages exist within enclosure.
Installation and service should be performed
only by trained service personnel.

Figure 1. 1/8 DIN Panel Cutout Dimensions

Figure 2. Panel Mounting Details

!

3.622" (92 mm)

1.772"

(45mm)

Panel Cutout

to DIN 43700

Square Corners to 0.060"

(1.5mm) Max Radius

A

B

Tolerances:

A: +0.032 (+0.8mm)

-0.000 (-0.0mm)

B: +0.024 (+0.6mm)

-0.000 (-0.0mm)

Safety Information

Installation

There is no need to remove the meter from its case to complete the installation, wiring, and setup of
the meter for most applications.
Instructions are provided for changing the transmitter power supply to output 5 or 10 VDC instead of
24 VDC, see page 10.

Unpacking

Remove the meter from box. Inspect the packaging and contents for damage. Report damages, if
any, to the carrier.
If any part is missing or the meter malfunctions, please contact your supplier or the factory for
assistance.

Panel Mounting Instructions

• Prepare a standard 1/8 DIN panel cutout – 3.622" x 1.772" (92 mm x 45 mm). Refer to Figure 1
below, for more details.

• Clearance: allow at least 6.0" (152 mm) behind the panel for wiring.

• Panel thickness: 0.04" - 0.25" (1.0 mm - 6.4 mm).

Recommended minimum panel thickness to maintain Type 4X
rating: 0.06" (1.5 mm) steel panel, 0.16" (4.1 mm) plastic panel.

• Remove the two mounting brackets provided with the meter (back-off the two screws so that there is ¼"
(6.4 mm) or less through the bracket. Slide the bracket toward the front of the case and remove).

• Insert meter into the panel cutout.

• Install mounting brackets and tighten the screws against the panel. To achieve a proper seal, tighten

the mounting bracket screws evenly until meter is snug to the panel along its short side. DO NOT
OVER TIGHTEN, as the rear of the panel may be damaged.

9

Din Mounted Digital Display Instruction Manual

Figure 3. Meter Dimensions - Side View

Figure 4. Meter Dimensions - Top View

NO

NC

NC

C

NO

C

NO

NC

NC

C

NO

C

+

-

R

Mounting Dimensions

Transmitter Supply Voltage Selection (P+, P-)

All meters, including models equipped with the 12-24 VDC power option, are shipped from the factory
configured to provide 24 VDC power for the transmitter or sensor.

If the transmitter requires 5 or 10 VDC excitation, the internal jumper J4 must be configured
accordingly.

To access the voltage selection jumper:

1. Remove all the wiring connectors.

2. Unscrew the back cover.

3. Slide out the back cover by about 1 inch.

4. Configure the J4 jumper, located behind the input signal connector, for the desired excitation
voltage as shown.

Figure 5. Transmitter Supply Voltage Selection

10

Din Mounted Digital Display Instruction Manual

Use copper wire with 60°C or 60/75°C insulation for all line
voltage connections. Observe all safety regulations. Electrical
wiring should be performed in accordance with all applicable
national, state, and local codes to prevent damage to the
meter and ensure personnel safety.

Warning!

Do not connect any equipment other than Automation
Products Group’s expansion modules, cables, or meters
to the RJ45 M-LINK connector. Otherwise damage will
occur to the equipment and the meter.

Figure 7. Power Connections

AC or DC

POWER

Required External Fuse:

5 A max, 250 V Slow Blow

POWER

+

-

Connections

All connections are made to removable screw terminal connectors located at the rear of the meter.

Connectors Labeling

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

Figure 6. Connector Labeling for Fully Loaded Meter

Power Connections

Power connections are made to a two-terminal connector labeled POWER on Figure 6 on page 11. The
meter will operate regardless of DC polarity connection. The + and - symbols are only a suggested wiring
convention.

11

Din Mounted Digital Display Instruction Manual

Signal Connections

Signal connections are made to a six-terminal connector labeled SIGNAL on Figure 6. The COM
(common) terminal is the return for the 4-20 mA and the 10 V input signals.

Current (mA) Connections

The following figures show examples of current connections.
There are no switches or jumpers to set up for current inputs. Setup and programming is performed
through the front panel buttons.

Figure 8. Transmitters Powered by Internal Supply

Figure 9. Transmitter Powered by Ext. Supply or Self-Powered

The current input is protected against current overload by a resettable fuse. The display may or may not
show a fault condition depending on the nature of the overload.
The fuse limits the current to a safe level when it detects a fault condition, and automatically resets itself
when the fault condition is removed.

Voltage (V) Connections

The following figures show examples of voltage connections.
There are no switches or jumpers to set up for voltage inputs. Setup and programming is performed
through the front panel buttons.

Figure 10. Voltage Input Connections

The meter is capable of accepting any voltage from -10 VDC to +10 VDC.

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Din Mounted Digital Display Instruction Manual

C NONO NC NC C

RELAY4 RELAY3

4 36 5 2 1

C NONO NC NC C

RELAY2 RELAY1

4 36 5 2 1

C

R

C

R

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

Serial communications connection is made to an RJ45 connector labeled M-LINK on Figure 6. For
interfacing to the meter, use the PDA1232 for RS-232 or the PDA1485 for RS-485. The same port is used
for interfacing with all expansion modules (e.g. external relays, digital I/O).

Relay Connections

Relay connections are made to two six-terminal connectors labeled RELAY1 – RELAY4 on Figure 6.
Each relay’s C terminal is common only to the normally open (NO) and normally closed (NC) contacts of
the corresponding relay. The relays’ C terminals should not be confused with the COM (common) terminal
of the INPUT SIGNAL connector.

Figure 11. Relay 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:

Figure 12. 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:

1. Use capacitors rated for 250 VAC.

2. RC networks may affect load release time of solenoid loads. Check to confirm proper operation.

3. Install the RC network at the meter's relay screw terminals. An RC network may also be installed across the load.
Experiment for best results.

Figure 13. Low Voltage DC Loads Protection

RC Networks Available from Automation Products Group

RC networks are available from Automation Products Group and should be applied to each relay contact switching an
inductive load. Part number: PDX6901.

Note: Relays are de-rated to 1/14th HP (50 watts) with an inductive load.

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Din Mounted Digital Display Instruction Manual

12-35 VDC

Power
Supply

+

4-20 mA

Input Meter

-

+

RI- I+

13 2

RELAY1

3 2 1

24 V

-

4-20 mA Input

Remote Display,

Chart Recorder, Etc.

-

+

RI- I+

MA OUT

13 2

RELAY1

3 2 1

24 V

MA OUT

F4 Digital Input Connections

A digital input, F4, is standard on the meter. This digital input is connected with a normally open contact
across F4 and COM, or with an active low signal applied to F4.

Figure 14. F4 Digital Input Connections

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 may be powered internally or from an external power supply.

Figure 15. 4-20 mA Output Connections

Analog Output Transmitter Power Supply

The internal 24 VDC power supply powering the analog output may be used to power other devices, if the
analog output is not used. The I+ terminal is the +24 V and the R terminal is the return.

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Din Mounted Digital Display Instruction Manual

Warning!

Do not connect or disconnect the expansion
modules with the power on!

More detailed instructions are provided with each
optional expansion module.

Figure 16. Expansion Modules & DIN Rail

Mounting Kit

Figure 17. External Relays Module

Connections

1 2

RLY5 RLY6 RLY7 RLY8

3 4 5 6 7 8

NO C NO C NO C NO C

1 2 3 4 5 6

+5 I1 I2 I3 I4 O1

7 8

O2 O3

9 10

O4 G

DI 1-4 DO 1-4

5 VDC GND

External Relays & Digital I/O Connections

The relay and the digital I/O expansion modules PDA1004 & PDA1044 are connected to the meter using
a CAT5 cable provided with each module. The two RJ45 connectors on the expansion modules are
identical and interchangeable; they are used to connect additional modules to the system.

Note: The jumper located between the RJ45 connectors of the PDA1044 must be removed on the second

digital I/O module in order for the system to recognize it as module #2.

Figure 18. Digital I/O Module Connections

Interlock Relay Feature

As the name implies, the interlock relay feature reassigns one, or more, alarm/control relays for use as
interlock relay(s). Interlock contact(s) are wired to digital input(s) and trigger the interlock relay. This
feature is enabled by configuring the relay, and relative digital input(s) (see page 35).
In one example, dry interlock contacts are connected in series to one digital input which will be used to
force on (energize) the assigned interlock power relay when all interlock contacts are closed (safe). The
interlock relay front panel LED flashes when locked out. The interlock relay would be wired in-series with
the load (N/O contact). See below.

Figure 19. Interlock Connections

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