Helios PD2-6100 User manual

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
PRECISION DIGITAL CORPORATION
233 South Street • Hopkinton MA 01748 USA
Tel [phone] • Fax [phone]
www.predig.com
•Large Display NEMA 4X, IP65 Wall Mounted Meter
•15, 30, 150, 300 mV unipolar; ±15, ±25, ±150, ±250 mV bipolar Inputs
•Large Dual-Line 6-Digit Display, 1.8" (46 mm) Digits Readable up to 100 Feet (30 Meters) Away
•Selectable 5 or 10 VDC Sensor Excitation @ 350 mA Max
•4 Relays with Interlocking Capability + Isolated 4-20 mA Output Option
•Free PC-Based, On-Board, MeterView Pro USB Programming Software
•SunBright Display Standard Feature; Great for Outdoor Applications
•Operating Temperature Range: -40 to 65°C (-40 to 149°F)
•Conformal Coated PCBs for Dust and Humidity Protection
•UL & C-UL Listed. E160849; 508 Industrial Control Equipment
•Input Power Options: 85-265 VAC / 90-265 VDC or 12-24 VDC / 12-24 VAC
•Supports up to twelve (12) 350 Ω Load Cells
•Capture or Programmable Tare Feature
•Auto-Zero Feature Eliminates Zero Drift
•Ratiometric Operation
•Programmable Display, Function Keys & Digital Inputs
•On-Board RS-485 Serial Communications
•Modbus RTU Communication Protocol Standard
•5 Digital Inputs & 4 Digital Outputs Standard
•Password Protection
•Light / Horn & Button Accessory
•Control Station Accessory for Remote Operation
•3-Year Warranty
MeterView Pro
USB Install

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
2
Disclaimer
The information contained in this document is
subject to change without notice. Precision Digital
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.
See Warranty Information and Terms &
Conditions on www.predig.com for complete
details.
•Read complete instructions prior to installation
and operation of the meter.
•Risk of electric shock or personal injury.
•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. Precision Digital
Corporation shall not be held liable for damages
resulting from such improper use.
WARNING
Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Limited Warranty
Precision Digital Corporation warrants this
product against defects in material or
workmanship for the specified period under
“Specifications” from the date of shipment from
the factory. Precision Digital’s liability under this
limited warranty shall not exceed the purchase
value, repair, or replacement of the defective unit.
See Warranty Information and Terms &
Conditions on www.predig.com for complete
details.
Registered Trademarks
All trademarks mentioned in this document are
the property of their respective owners.
© 2021 Precision Digital Corporation.
All rights reserved.
FREE MeterView Pro
Programming Software
The meter can be powered from the USB connection. When
using the USB connection, DO NOT apply AC or DC power to
the meter.
The easiest and quickest way to program your Helios
meter is to use the FREE MeterView Pro
programming software. This software is loaded into
the meter and connects and installs directly to your
PC with a USB cable. We recommend that the first
thing you do after taking the meter out of the box is
connect the Helios to your PC with the provided USB
cable –do not use a different cable. DO NOT apply
AC or DC power to the meter while your PC is
connected to the meter as it will disrupt the USB
connection. You don’t even have to apply an input
signal.
MeterView Pro programming software is intuitive, and
most customers can get their meter programmed as
they like without even looking in the manual.
Watch MeterView Pro Software Video at
www.predig.com/meterviewpro
In addition to programming, the software may be used
for:
•Monitoring
•Datalogging using your PC
•Generating and saving programming files for
later use
Once your meter is programmed the way you want it,
you can wire it up for your application per the
instructions in this manual and install it. If you find that
you need to make adjustments to the programming
after the meter is installed, you can use the
programming panel buttons and the instructions in
this manual to do so.

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
3
Table of Contents
Introduction..........................................................................................................6
Ordering Information...........................................................................................6
Specifications.......................................................................................................8
General.............................................................................................................8
Strain Gauge Input ..........................................................................................9
Relays...............................................................................................................9
USB Connection..............................................................................................9
Isolated 4-20 mA Transmitter Output ..........................................................10
RS-485 Serial Communications ...................................................................10
Modbus®RTU Serial Communications........................................................10
Digital Input (F4)............................................................................................10
MeterView Pro Software................................................................................10
Compliance Information....................................................................................11
Safety..............................................................................................................11
Safety Information .............................................................................................11
Installation..........................................................................................................11
Unpacking......................................................................................................11
Wall Mounting Instructions ..........................................................................12
Mounting Dimensions..................................................................................12
Conduit Holes Location...............................................................................12
Pipe Mounting Instructions ..........................................................................13
Installation Overview.....................................................................................14
MeterView Pro Software................................................................................14
MeterView Pro Installation...........................................................................14
Sensor Excitation Voltage Selection (EX+, EX-).........................................15
Connections...................................................................................................16
Connectors Labeling ...................................................................................16
Power Connections.....................................................................................17
Signal Connections .....................................................................................17
Switch Configuration ...................................................................................17
Shunt Calibration.........................................................................................19
Relay Connections......................................................................................19
Switching Inductive Loads...........................................................................19
RS-485 Connections...................................................................................20
RS-485 Multi-Drop Connection ...................................................................20
RS-485 Serial Converters ...........................................................................20
Digital I/O Connections................................................................................21
F4 Digital Input Connections.......................................................................21
4-20 mA Output Connections......................................................................21
Analog Output Power Supply......................................................................21
Remote Operation of Meter.........................................................................22
Interlock Relay Feature...............................................................................22
Setup and Programming...................................................................................23
Overview.........................................................................................................23
LED Status Indicators...................................................................................23
Programming Buttons...................................................................................24
Display Functions & Messages....................................................................25
Main Menu......................................................................................................27
Setting Numeric Values ................................................................................27
Setting Up the Meter (setup)........................................................................27
Setting the Input Signal (Input)..................................................................28
Setting the Display Units (units)................................................................28
Setting the Display Units or Custom Tags (units).....................................29
Programming the Meter (prog)...................................................................29
Calibrating the Meter with Strain Gauge/Load Cell (Cal)............................30
Setting the Display Parameter & Intensity (dsplay) ...................................32
Display Intensity (d-Inty)...........................................................................32
Setting the Relay Operation (relay)............................................................33
Setting the Relay Action..............................................................................33
Programming Set and Reset Points............................................................34
Setting Fail-Safe Operation.........................................................................34
Programming Time Delay............................................................................34

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
4
Relay and Alarm Operation Diagrams.........................................................34
HighAlarmOperation (Set >Reset)..............................................................34
Low Alarm Operation (Set < Reset)............................................................35
High Alarm with Fail-Safe Operation (Set > Reset).....................................35
Low Alarm with Fail-Safe Operation (Set < Reset) .....................................35
Time Delay Operation .................................................................................35
Pump Alternation Control Operation ...........................................................36
Relay Sampling Operation ..........................................................................36
Relay Operation Details................................................................................37
Overview .....................................................................................................37
Relays Auto Initialization.............................................................................37
Fail-Safe Operation.....................................................................................37
Front Panel LEDs........................................................................................37
Latching and Non-Latching Relay Operation ..............................................37
Non-Latching Relay (Auto) .........................................................................38
Non-Latching Relay with Manual Reset (A-nman).......................................38
Latching Relay (LatcH)...............................................................................38
Latching Relay with Clear (Lt-Clr)............................................................38
Acknowledging Relays................................................................................39
Pump Alternation Control Applications (Altern) ........................................39
Setting Up the Interlock Relay (Force On) Feature.....................................40
Scaling the 4-20 mA Analog Output (Aout).................................................41
Reset Menu (reset).......................................................................................41
Tare Menu (Tare)...........................................................................................41
Tare Functionality (tare) ............................................................................41
Manual Control Menu (Contrl).....................................................................41
Setting Up the Password (pass)...................................................................42
Protecting or Locking the Meter ..................................................................42
Making Changes to a Password Protected Meter.......................................42
Disabling Password Protection....................................................................42
Advanced Features Menu.............................................................................43
Advanced Features Menu & Display Messages..........................................43
Noise Filter (filter)...................................................................................44
Noise Filter Bypass (bypass)......................................................................44
Rounding Feature (round)..........................................................................44
Modbus RTU Serial Communications (serial)..........................................44
Select Menu (SElect).................................................................................45
Input Signal Conditioning (Functn).............................................................45
Auto-Zero (Auto 0).....................................................................................45
Low-Value Cutoff (CutofF) .........................................................................45
Analog Output Programming (AoutPr) .......................................................46
Programmable Function Keys User Menu (user).......................................47
Internal Source Calibration (ICAL) ..............................................................48
Error Message (error) ...............................................................................48
Meter Operation .................................................................................................49
Button Operation...........................................................................................49
Function Keys Operation..............................................................................49
Digital Inputs Operation................................................................................49
Maximum/Minimum Readings......................................................................49
Troubleshooting.................................................................................................50
Diagnostics Menu (diag) ..............................................................................50
Testing the Display LEDs............................................................................50
Determining Software Version.....................................................................50
Reset Meter to Factory Defaults...................................................................50
Factory Defaults & User Settings................................................................51
Troubleshooting Tips....................................................................................52

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
5
Table of Figures
Figure 1. Meter Mounting Holes Location .......................................................12
Figure 2. Meter Mounting Holes Dimensions..................................................12
Figure 3. Meter Dimensions –Side View.........................................................12
Figure 4. Meter Dimensions - Front View ........................................................12
Figure 5. Conduit Holes Location –Bottom View...........................................12
Figure 6. Vertical Pipe Mount Assembly..........................................................13
Figure 7. Horizontal Pipe Mount Assembly.....................................................13
Figure 8. Sensor Excitation Voltage Selection................................................15
Figure 9. PD2-6100-6H0 / 7H0 Connectors Label............................................16
Figure 10. PD2-6100-6H7 / 7H7 Connectors Label..........................................16
Figure 11. Power Connections .........................................................................17
Figure 12. Strain Gauge Configuration Switch ...............................................17
Figure 13. Strain Gauge Powered by Internal Supply ....................................18
Figure 14. Strain Gauge Powered by External Supply...................................18
Figure 15. Multiple Strain Gauges Connected Through Junction Box.........18
Figure 16. mV Transducer Input Connections................................................18
Figure 17. Four-wire mV Transducer Connections.........................................18
Figure 18. Shunt Resistor .................................................................................19
Figure 19. Relay Connections...........................................................................19
Figure 20. AC and DC Loads Protection..........................................................19
Figure 21. Low Voltage DC Loads Protection.................................................19
Figure 22. RS-485 Connection..........................................................................20
Figure 23. Five-Wire RS-485 Connections.......................................................20
Figure 24. Three-Wire RS-485 Multi-Drop Connections.................................20
Figure 25. Connections for RS-485 Connector to Serial Converter..............21
Figure 26. Three-Wire RS-485 Connection......................................................21
Figure 27. Digital Input and Output Connections...........................................21
Figure 28. F4 Digital Input Connections..........................................................21
Figure 29. 4-20 mA Output Connections .........................................................21
Figure 30. Analog Output Supply Powering Other Devices...........................21
Figure 31. Meter to PDA2364-MRUE Control Station Connection.................22
Figure 32. Interlock Connections.....................................................................22

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
6
Introduction
The Helios PD2-6100 is a multi-purpose, easy to use,
large-display digital strain gauge & load cell meter
ideal for weighing and force measurement
applications. With a max current of 350 mA at 10 V, it
can support up to twelve (12) 350 Ω load cells
(minimum load resistance of 28 Ω), making it ideal for
multipoint weight measurement applications. It also
features large 1.8 inch superluminous LED digits,
which can be read from up to 100 feet away. It is
housed in a water-resistant, field mountable, NEMA
4X/IP65 rated enclosure for convenient indoor and
outdoor installation.
The programming buttons are located behind the
lower panel door and are not generally accessible
during operation. For that reason, we recommend the
use of the PDA2364-MRUE remote control station
which has four buttons to mimic the buttons behind
the panel. An additional control station, model
PDA2361-T, is available to remotely tare the meter.
The meter accepts mV input signals up to 300 mV.
Three of the programming buttons can be custom-
programmed for a specific operation. The mV input
can be scaled to display the process in two different
scales; for example, pounds on the upper display and
gallons on the lower display.
A fully loaded Helios PD2-6100 meter comes with four
SPDT relays, a 4 20 mA output, one 10 VDC sensor
excitation, one 24 VDC power supply, five digital
inputs and four digital outputs, and onboard RS-485
serial communications.
The four relays can be used for alarm indication or
process control applications. The 4-20 mA isolated
output, Modbus RTU serial communications, and
digital I/O features make the Helios an excellent
addition to any system.
Ordering Information
85-265 VAC Models
Model
Standard
Features
Options
Installed
PD2-6100-6H0
5 Digital Inputs,
4 Digital Outputs,
RS-485
Communications
No options
PD2-6100-6H7
4 relays
4-20 mA output
12-24 VDC Models
Model
Standard
Features
Options
Installed
PD2-6100-7H0
5 Digital Inputs,
4 Digital Outputs,
RS-485
Communications
No options
PD2-6100-7H7
4 relays
4-20 mA output
Accessories
Model
Description
PDA0004
Cable Gland
PDA7485-I
RS-232 to RS-485 isolated converter
PDA8485-I
USB to RS-485 isolated converter
PDAPLUG2
Plastic Conduit Plug
PDX6901
Snubber: 0.01 μF/470 Ω, 250 VAC
PDA2360 Control Stations
Model
Description
PDA2360-E
Emergency button
PDA2361-A
Ack button
PDA2361-B
Blank button
PDA2361-R
Reset button
PDA2361-T
Tare button
PDA2361-S
Stop button
PDA2361-Q
Silence button
PDA2362-AR
Ack and Reset buttons
PDA2362-BB
Two blank buttons
PDA2364-MRUE
Menu, right, up, enter buttons
Note: Control stations can be connected directly to the Helios meter’s
on-board digital inputs. See Remote Operation of Meter on page 22
for details.

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
7
Light / Horn & Button Accessories
Helios Meter Shown with MOD-PD2LHRB1 Red Light
/ Horn and Button. Meter Sold Separately.
Model
Description
MOD-PD2LHRB1
Red Light / Horn and Button
Mounted and Wired to Helios(1)
MOD-PD2LHGB1
Green Light / Horn and Button
Mounted and Wired to Helios(1)
MOD-PD2LHYB1
Yellow Light / Horn and Button
Mounted and Wired to Helios(1)
MOD-PD2LHBB1
Blue Light / Horn and Button
Mounted and Wired to Helios(1)
MOD-PD2LHWB1
White Light / Horn and Button
Mounted and Wired to Helios(1)
MOD-PD2LH5CB1
Light / Horn with User Choice of
Red, Green, Yellow, Blue or White
Light, Button, Mounted and Wired
to Helios(1)
MOD-
PD2LH3CB1-RYG
Light / Horn with Red, Yellow,
Green Light Layers, Button,
Mounted and Wired to Helios(1)
Note:
1. Specify MOD-PD2LH model as a separate item on the order for the
Helios to order the Light / Horn & Button accessory installed and
wired. Meter is sold separately.
2. An external 24 VDC power supply (PDA1024-01) is required to
power the Light / Horn.
9 labels are provided for the button.
Pipe Mounting Kit
Helios Meter Shown mounted to pipe using PDA6260
pipe mounting kit. See Pipe Mounting Instructions on
page 13 for details.
Model
Description
PDA6260
2" Pipe Mounting Kit for PD2
Signal Splitter & Conditioner Accessories
Model
Description
PD659-1MA-1MA
Signal Isolator with One 4-20 mA
Input and One 4-20 mA Output
PD659-1MA-2MA
Signal Splitter with One 4-20 mA
Input and Two 4-20 mA Outputs
PD659-1V-1MA
Signal Conditioner with One 0-10
VDC Input and One 4-20 mA Output
PD659-1MA-1V
Signal Conditioner with One
4-20 mA Input and One 0-10 VDC
Output

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
8
Specifications
Except where noted all specifications apply to
operation at +25°C.
General
Display
Dual-line: 1.8" (46 mm) high, red LEDs
6 digits per line (-99999 to 999999), with
lead zero blanking
Display
Intensity
Eight user selectable intensity levels.
Default value is six.
Display
Update Rate
5/second (200 ms)
LED Status
Indicators
See LED Status Indicators on page 23 for
details.
Overrange
Display flashes 999999
Underrange
Display flashes -99999
Display
Assignment
Display Line 1:
PV1, PV2, PCT, max & min, set points, PV
& units, net & gross weight, Modbus input,
millivolts.
Display line 2:
Same as Display Line 1; plus units, tag or
turned off.
Units
Predefined: lb, kg, ounce, gram, ton, metric
ton (tonne); and custom units.
Programming
Methods
Four programming 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 cycled.
Rounding
Select 1, 2, 5, 10, 20, 50, or 100
(e.g. rounding = 10, value = 123.45, display
= 123.50).
Tare
There are three modes of tare operation:
Capture Tare, Programmable Tare, and
Off. See Tare Functionality (tare) on page
41 for details.
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.
Non-Volatile
Memory
All programmed settings are stored in non-
volatile memory for a minimum of ten years
if power is lost.
Power
Options
85-265VAC50/60Hz;90-265VDC,20Wmax;
12-24 VDC, 12-24 VAC, 15 W max.
Powered over USB for configuration only.
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-to-power line
500 V input-to-output
(powered by external 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 (-40 to 149°F)
Storage temperature range:
-40 to 85°C (-40 to 185°F)
Relative humidity:
0 to 90% non-condensing
Note: Printed circuit boards are
conformally coated.
Connections
Power, signal, relays, mA out: Removable
screw terminal blocks accept 12 to 22
AWG wire.
RS-485: Removable screw terminal block
accepts 16 to 30 AWG wire.
Digital I/O: Non-removable screw terminal
blocks accept 16 to 30 AWG wire.
Enclosure
UL Type 4X, IP65 rated. Polycarbonate &
glass blended plastic case, color: gray.
Includes four PG11 through-hole conduit
openings, with two factory installed PG11,
IP68, black nylon threaded hole plugs with
backing nuts.
Mounting
Wall Mounting:
Four (4) mounting holes provided for
mounting meter to wall. See Wall
Mounting Instructions on page 12 for
additional details.
Pipe Mounting:
Optional pipe mounting kit (PDA6260)
allows for pipe mounting. Sold separately.
See Pipe Mounting Instructions on page 13
for additional details.
Tightening
Torque
Power, signal, relays, mA out terminals:
5 lb-in (0.56 Nm)
Digital I/O and RS-485:
2.2 lb-in (0.25 Nm)
Overall
Dimensions
10.63" x 12.59" x 4.77"
(270 mm x 319.7 mm x 121.2 mm)
(W x H x D)
Weight
6.10 lbs (2.76 kg)
Warranty
3 years parts & labor. See Warranty
Information and Terms & Conditions on
www.predig.com for complete details.

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
9
Strain Gauge Input
Inputs
Field selectable: 0-15 mV, 0-30 mV,
0-150 mV, 0-300 mV, ±15 mV, ±25 mV,
±150 mV, ±250 mV, or Modbus PV (Slave)
Isolated
Sensor Power
Supply
Terminals EX+ & EX-: 10 VDC or
5 VDC 10%, rated @ 350 mA max.
Note: Do not use 24 VDC to power strain
gauge bridge.
Accuracy
±0.03% of calibrated span ±1 count
Minimum
Load
Resistance
14 Ω @ 5 V
28 Ω @ 10 V
Maximum
Excitation
Current
350 mA @ 5 V or 10 V
Temperature
Drift
0.002% of calibrated span/C max from
0 to 65C ambient, 0.005% of calibrated
span/C max from -30 to 0C ambient
Functions
Linear with multi-point linearization
Multi-Point
Linearization
2 to 32 points for PV or PV1
2 to 8 points for PV2 (Dual-scale feature)
Low
Cutoff
0.1 to 999,999 (0 disables cutoff function).
Point below at which display always shows
zero.
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
15 mV
0.2 mV
25 mV, 30 mV
0.4 mV
150 mV
2.0 mV
250 mV, 300 mV
4.0 mV
An Error message will appear if the input 1
and input 2 signals are too close together.
Input
Impedance
Strain Gauge Bridge: Greater than 10 MΩ
mV Source: 200 kΩ
Relays
Rating
4 SPDT (Form C) internal and 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 Switching Inductive Loads on
page 19 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 or without clear
•Pump alternation control (2 to 4 relays)
•Sampling (based on time)
•Off (disable unused relays and enable
Interlock feature)
•Manual on/off control mode
Relay Reset
(Acknowledge)
User selectable via front panel button, F4
digital input, external contact closure on
digital inputs, or through serial
communications.
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.
USB Connection
Function
Programming only
Compatibility
USB 2.0 Standard, Compliant
Connector
Type
Type B receptacle
Cable
USB Type A-B cable
Driver
Microsoft®Windows®XP/Vista/7/8/10
Power
USB port provides power to the meter.
DO NOT apply AC or DC power to the
meter while the USB port is in use.

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
10
Isolated 4-20 mA Transmitter
Output
Output
Source
Process variable (PV), max, min, set points
1-4, Modbus input, or manual control mode
Scaling
Range
1.000 to 23.000 mA for any display range
Calibration
Factory calibrated:
0.00 to 100.00 = 4-20 mA output
Analog
Output
Programming
1.000 mA minimum and 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% isolated
from the input at >500 V. May be used to
power the 4-20 mA output or other devices
(except load cell/strain gauge). Refer to
Connectors Labeling on page 16 and
Figure 29. 4-20 mA Output Connections on
page 21.
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 
Additional
4-20 mA
Outputs
The PD659-1MA-2MA can split the optional
4-20 mA output into two isolated 4-20 mA
outputs
0-10 VDC
Output
The PD659-1MA-1V can convert the
optional 4-20 mA output to a 0-10 VDC
output
RS-485 Serial Communications
Compatibility
EIA-485
Connectors
Removable screw terminal connector
Max Distance
3,937' (1,200 m) max
Status
Indication
Separate LEDs for Power (P), Transmit
(TX), and Receive (RX)
Modbus®RTU Serial
Communications
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 Helios Modbus Register Tables located
at www.predig.com for details.
Digital Input (F4)
Function
Operate tare function, remote operation of
front-panel buttons, acknowledge/reset
relays, reset max/min values. See Function
Keys & Digital I/O Available Settings on
page 47 for a complete list of capabilities.
Contacts
3.3 VDC on contact. Connect normally
open contacts across F4 to COM
Logic Levels
Logic High: 3 to 5 VDC
Logic Low: 0 to 1.25 VDC
MeterView Pro Software
Availability
Download directly from meter or from
www.predig.com/download_software
System
Requirements
Microsoft®Windows®XP/Vista/7/8/10
Communications
USB 2.0 (for programming only)
(Standard USB A to USB Type B)
RS-485 to USB converter
(programming, monitoring, and data
logging)
Configuration
Configure meters one at a time
Power
USB port provides power to the meter.
DO NOT apply AC or DC power to the
meter while the USB port is in use.

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
11
Compliance Information
Safety
UL & C-UL
Listed
USA & Canada
UL 508 Industrial Control Equipment
(USA)
C22.2 No. 142 (Canadian National
Standard)
UL File Number
E160849
Enclosure
UL Type 4X, NEMA 4X, IP65
Low Voltage
Directive
EN 61010-1
Safety requirements for measurement,
control, and laboratory use
Safety Information
•Read complete instructions prior to installation
and operation of the meter.
•Risk of electric shock or personal injury.
•Hazardous voltages exist within enclosure.
Installation and service should be performed only
by trained service personnel.
Installation
There is no need to open the clear plastic front
cover in order to complete the installation, wiring,
and setup of the meter. All programming is done
using MeterView Pro software or through the
buttons and switches located under the lower
door panel and are accessible by removing the
single securing screw. Wires should be run
through the knockout holes located on the bottom
of the meter, see Figure 5. Conduit Holes
Location –Bottom View on page 12 for details.
There are a total of four pre-drilled conduit entry
holes located at the bottom of the meter. If the
need to drill additional holes arises, make sure
you will have the clearance necessary for conduit
mounting hardware.
Do not disconnect the RJ45 connector found on
the right side of the meter wiring board. Doing so
will disable the on-board digital I/O, RS-485 serial
communications, and M-Link functionality.
Instructions are provided for changing the
transmitter power supply to output 5 or 10 VDC
instead of 24 VDC, see Sensor Excitation
Voltage Selection (EX+, EX-) on page 15.
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.

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
12
Wall Mounting Instructions
The meter can be mounted to any wall using the four
provided mounting holes. Note that the bottom
mounting holes are located underneath the lower door
panel. To mount the meter to a wall, follow these
instructions
•Prepare a section of wall approximately 11" x 13"
(280 mm x 330 mm) for meter mounting by
marking with a pencil the mounting holes (shown
in Figure 1) on the wall.
•Select the appropriate mounting screws for the
mounting surface to be used. The mounting holes
diameter is shown on Figure 2.
Note: Mounting screws are not included.
•Using a drill bit slightly smaller than the girth of
the mounting screws, pre-drill holes at the
mounting locations previously marked.
•Insert mounting screws into the four mounting
holes and screw them into the pre-drilled holes.
DO NOT overtighten the mounting screws as it is
possible that the enclosure could crack and
become damaged.
Figure 1. Meter Mounting Holes Location
Figure 2. Meter Mounting Holes Dimensions
Mounting Dimensions
Figure 3. Meter Dimensions –Side View
Figure 4. Meter Dimensions - Front View
Conduit Holes Location
Figure 5. Conduit Holes Location –Bottom View
Mounting Hole
Mounting Hole
Mounting Hole
Mounting Hole
Lower
Door
Panel
10.43" (265 mm)
9.8" (249 mm)
11.14" (283 mm)
Dia. 0.2"
(5.5 mm)
Dia. 0.2"
(5.5 mm)
2.63" (67 mm)
4.77"
(121.2 mm)
10.63" (270 mm)
12.59" (319.7 mm)
Mounting HoleMounting Hole
Lower
Door
Panel
Plugged
Holes Unplugged Holes
1.1"
(27.9 mm)
1.99"
(50.5 mm)
0.9"
(23 mm) Ø0.74" (18.9 mm) Drill or Punch-Out Holes

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
13
Pipe Mounting Instructions
The meter can also be mounted to a pipe using the
optional pipe mounting kit (PDA6260). This kit
includes two mounting plates, two U-bolts, and the
necessary nuts and bolts. To mount the meter to a
pipe using the pipe mounting kit accessory, follow
these instructions.
•Secure the mounting plates to the top and bottom
(for vertical pipes) or left and right (for horizontal
pipes) of the reverse side of the meter enclosure
using the provided fasteners.
DO NOT overtighten the fasteners as it could
cause damage to the enclosure.
•Using the provided nuts and U-bolts, secure the
mounting plates to the pipe applying enough
torque such that the meter cannot be moved up
or down (or side to side).
Figure 6. Vertical Pipe Mount Assembly
Figure 7. Horizontal Pipe Mount Assembly
Mounting Plate U-Bolt
Pipe
U-Bolt
Back of
Meter
Mounting Plate
Mounting
Plate Mounting
Plate
Pipe
Back of
Meter U-BoltU-Bolt

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
14
Installation Overview
We recommend the following sequence for getting the
meter into service:
1. DO NOT apply AC or DC power to the meter.
2. Connect the meter to the PC with the USB cable
provided. DO NOT use a different USB cable.
3. If MeterView Pro (MVPro) is already installed in
your computer, then the program will launch
automatically in most systems. If the program
does not start automatically, double-click on the
MVPro icon.
4. If MVPro is not installed, follow the instructions
provided below.
5. Use MVPro to configure the meter for your
application.
6. Disconnect the USB cable from the meter.
7. Apply power and signal and check operation of
the meter.
8. Install the meter and put into service.
9. Make any programming adjustments using the
programming buttons.
MeterView Pro Software
The easiest and quickest way to program your Helios
meter is to use the FREE MeterView Pro
programming software. This software is loaded into
the meter and connects and installs directly to your
PC with the USB cable provided. DO NOT use a
different USB cable. We recommend that the first
thing you do after taking the meter out of the box is
connect the Helios to your PC with the provided USB
cable. DO NOT apply AC or DC power to the meter
while your PC is connected to the meter as it will
disrupt the USB connection. It is not necessary to
apply an input signal.
MeterView Pro programming software is intuitive, and
most customers can get their meter programmed as
they like without even looking in the manual.
Watch Meterview Pro Software Video at
www.predig.com/meterviewpro
MeterView Pro Installation
1. Connect one end of the provided USB cable
to the meter and the other end to the
computer. The computer will automatically
install the driver software it needs to talk to
the meter. Follow the on-screen instructions
and allow sufficient time for the process to
complete. This can take a few minutes. If the
process is interrupted, then it could leave the
system in an unstable condition.
•Only one meter may be connected at a time.
Attaching multiple meters will cause a conflict
with the meter software.
•DO NOT apply AC or DC power to the meter
when using the USB connection.
2. Once the driver is installed, an AutoPlay
dialog should appear for the drive
“MAINSTAL.” Click “Open folder to view
files.”
If the computer does not display an AutoPlay
dialog for the drive “MAINSTAL,” you should
open My Computer and double-click on the
drive labeled “MAINSTAL.”
3. Double-click on the file named “MAStart.”
The program will open a few windows and
install two programs on your computer.
Simply follow the on-screen instructions until
you see one of the dialogs below. If you
receive a “User Account Control” warning,
click “Yes.”
4. If there is an update available, click the
“Update” button to install the new version.
Otherwise, click “Configure” to begin
programming your meter.
Note: If you decide to update your MeterView Pro
software, once the installation has completed, you
will be asked if you want to update the setup files
located on the meter itself. This way, you will
always have the most current version on the meter
for future installs.
•DO NOT unplug the meter while the new
installation files are being written to it. The meter
will display uwrite during the process and you
will receive an on-screen notification once the
process is complete.

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
15
Sensor Excitation Voltage
Selection (EX+, EX-)
All meters, including models equipped with the
12-24 VDC power option, are shipped from the
factory configured to provide 10 VDC excitation
for the sensor.
If the sensor requires 5 VDC excitation, the
switch labeled P+/P- must be configured
accordingly.
To access the voltage selection switch:
1. Turn off the power to the meter.
2. Unscrew and open the lower door panel.
3. Locate the P+/P- switch located in the
center of the connections board (see
diagram below).
4. Flip this switch into the appropriate
position for the required transmitter
excitation.
Figure 8. Sensor Excitation Voltage Selection
P+/P-
10V 5V
MENU RIGHT UP ACK
MENU ZERO
F1
RESET
F2
TARE
F3

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
16
Connections
All connections are made to screw terminal connectors located under the lower door panel. Remove the single
securing screw in order to access the wiring terminals.
•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.
Connectors Labeling
The connectors’ label, affixed to the inside of the lower door panel, shows the location of all connectors available with
the ordered configuration.
•DO NOT connect any equipment to the RJ45 M-LINK connector. Otherwise damage will occur to the
equipment and the meter.
•DO NOT disconnect the RJ45 connector located to the left of the power terminal block. Doing so will disable
the on-board digital I/O, and the RS-485 serial communications.
Figure 9. PD2-6100-6H0 / 7H0 Connectors Label
Figure 10. PD2-6100-6H7 / 7H7 Connectors Label
RI-I+
+-
NONC
C
21
1
2
3
4
5
6
7
8
P+/P-
10V 5V
RS-485
DIGITAL I/O
M-LINK
USB
MENU RIGHT UP ACK
POWER
PWR TX RX
DI DI DO DO
O1 O2 O3 O4 G
I1I2I3I4
+5
__ __
NONCCNONCCNONCC
MA OUT
21 3 43 6521 RELAY4RELAY3 43 6521
RELAY2RELAY1
COM SG-F4 SG+EX-
3412 5
EX+
6
SIGNAL
F1 F2 F3
MENU ZERO RESET TARE

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
17
Power Connections
Power connections are made to a two-terminal
connector labeled POWER. The meter will operate
regardless of DC polarity connection. The + and -
symbols are only a suggested wiring convention. There
are separate models for low voltage and high voltage
power. See Ordering Information on page 6for
details.
Figure 11. Power Connections
Signal Connections
Signal connections are made to a six-terminal
connector labeled SIGNAL. The EX+ and EX-
terminals are used to sense the sensor excitation
voltage for ratiometric operation, when the sensor is
powered externally (switch 1 is off).
Switch Configuration
Setup and programming is performed both through
the programming buttons and switch settings shown
below. The switch configuration must correspond to
the Setup and Programming starting on page 23
(same range, type, etc.).
Figure 12. Strain Gauge Configuration Switch
Excitation (Switch 1)
The excitation switch designates whether the meter
will use its internal power supply or an external power
supply.
OFF
Excitation
External
Excitation
When switch is
turned OFF, an
external power
supply is used.
ON
Excitation
Internal
Excitation
When switch is
turned ON, the
Helios's power
supply is used.
Range (Switch 2)
The range switch adjusts the gain of the internal
circuitry. Narrower ranges require more amplification.
OFF
Range
Lower
internal
gain
Turn this switch OFF
for the following
input ranges: 150,
300, ±150, or ±250
mV.
ON
Range
Higher
internal
gain
Turn this switch ON
for the following
input ranges: 15, 30,
±15, or ±25 mV.
Polarity (Switch 3)
The polarity switch selects whether the range is
unipolar and starts at zero (i.e. 0 to 30 mV) or bipolar
and starts at a negative value, or below zero (i.e. -15
to +15 mV).
OFF
Polarity
Range
starts
below zero
(bipolar)
Turn this switch OFF
for the following
input ranges: ±15,
±25, ±150, or ±250
mV.
ON
Polarity
Range
starts at
zero
(unipolar)
Turn this switch ON
for the following
input ranges: 15, 30,
150, or 300.
Source (Switch 4)
The source switch tells the Helios whether the input is
a strain gauge bridge (i.e. Figure 15. Multiple Strain
Gauges Connected Through Junction Box, page 18),
or it is a signal from a 2 or 4 wire transducer, or mV
source (i.e. Figure 16. mV Transducer Input
Connections, page 18)
OFF
Source
Source is
strain
gauge
bridge
Turn this switch
OFF if the source
is a strain gauge
bridge
ON
Source
Source is
mV input
transducer
Turn this switch
ON if the
connected source
is a transducer*
*Ratio should be set to NO in Setup Input Menu
AC or DC
POWER
Required External Fuse:
5 A max, 250 V Slow Blow
POWER
+-
34
COM SG-F4 SG+EX-
3412 5
EX+
6
SIGNAL

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
18
Shunt Resistor (Switch 5)
The PD2-6100 provides a means of simulating strain
in a strain gauge bridge circuit via a 60.4KΩshunt
resistor included in the meter. This will simulate an
approximate 70% full-scale load in the case of a 350Ω
strain bridge.
OFF
Shunt
Shunt resistor is
disconnected
from the input
bridge.
Turn this switch
OFF to remove the
shunt resistor
ON
Shunt
Shunt resistor is
connected to the
input bridge.
Turn switch ON
when you want to
simulate a strain
load
Strain Gauge Connections
The following figures show examples of strain gauge
connections.
There is a 5-position DIP switch (CONFIG) to set up
the input ranges and sensor excitation.
Note: Refer to Switch Configuration on page 17 for
proper configuration switch positioning.
Figure 13. Strain Gauge Powered by Internal
Supply
Figure 14. Strain Gauge Powered by External
Supply
When connecting multiple strain gauges to the meter,
each must be wired in parallel. This is typically done
with the use of a junction box.
Figure 15. Multiple Strain Gauges Connected
Through Junction Box
Figure 16. mV Transducer Input Connections
Figure 17. Four-wire mV Transducer Connections
Notes
1. Two-wire mV signals: Connect positive to SG+
and negative to SG-
2. Three-wire transducer: Connect EX- to SG-.

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
19
Shunt Calibration
The PD2-6100 is equipped with a means of simulating
strain in a strain gauge bridge circuit, via a shunt
resistor included inside the meter. This technique is
performed by enabling the “shunt resistor” switch
(switch 5), which in turn shunts one leg of a
connected strain bridge with a predetermined resistive
load (60.4k). This technique can be used as a means
of verifying instrumentation by simulating a physical
input. With no load connected, the enabling of the
shunt resistor (switch 5) will simulate approximately a
70% F.S. load in the case of a 350Ω Strain Bridge.
Figure 18. Shunt Resistor
Relay Connections
Relay connections are made to two six-terminal
connectors labeled RELAY1 –RELAY4. 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 19. Relay Connections
Switching Inductive Loads
The use of snubbers to suppress electrical noise is
strongly recommended when switching inductive
loads to prevent disrupting the microprocessor’s
operation. The snubbers 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 20. AC and DC Loads Protection
Choose R and C as follows:
R: 0.5 to 1 Ωfor 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.
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.
Figure 21. Low Voltage DC Loads Protection
RC Networks (Snubbers) Available
from Precision Digital
RC networks are available from Precision Digital 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.
EX+
EX-
SG- SG+
CNONO NC NC C
RELAY4 RELAY3
4 36 5 2 1
CNONO NC NC C
RELAY2 RELAY1
4 36 5 2 1
C
R
C
R

Helios PD2-6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
20
RS-485 Connections
The RS-485 connections are made to a five terminal
connector used for Modbus®RTU serial
communications. The RS-485 terminals include
Transmit Data (DO) and (/DO), Receive Data (DI) and
(/DI), and Signal Ground. See Modbus RTU Serial
Communications (serial) on page 44 for more
information.
There are three diagnostic LEDs: Power (PWR)
Transmit Data (TX), and Receive Data (RX) to show
when the meter is transmitting and receiving data
from other devices.
Figure 22. RS-485 Connection
RS-485 Multi-Drop Connection
When using more than one meter in a multi-drop
mode, each meter must be provided with its own
unique address. The meter address (Slave ID) can be
programmed between 1 and 247. The transmit delay
can be set between 0 and 199 ms. The parity can be
set to even, odd, or none with 1 or 2 stop bits.
To change the meter address:
1. Press and hold the Menu button for three
seconds to access Advanced Features menu of
the meter.
2. Press Up arrow until Serial (SEriaL) menu is
displayed and press Enter, Addres is displayed.
3. Press Enter to change meter address using Right
and Up arrow buttons. Press Enter to accept.
4. Press Menu button to exit and return to Run
Mode.
RS-485 Serial Converters
To convert the RS-485 to RS-232, use the PDA7485-I
converter. To convert the RS-485 to USB, use the
PDA8485-I converter. See Ordering Information on
page 6for additional information.
RS-485 Connection Examples
Figure 23. Five-Wire RS-485 Connections
Figure 24. Three-Wire RS-485 Multi-Drop
Connections
Notes:
1. Termination resistors are optional, and values
depend on the cable length and characteristic
impedance. Consult the cable manufacturer for
recommendations.
2. Refer to RS-232 to RS-485 Converter
documentation for further details.
3. Use shielded cable, twisted-pair plus ground.
Connect ground shield only at one location
RS-485
PWR TX RX
DI DI DO DO
__ __
Shield
RS-232 Serial
Connection
to PC
R
R
Twisted-Pair
R
DI DI DO DO
__ __
RS-232 to RS-485
Converter
DI
DIDO DO
R
Shield
Twisted-Pair
R
Meter #1
DI DI DO DO
__ __ DI DI DO DO
__ __
Last Meter
RS-232 Serial
Connection
to PC
R
RS-232 to RS-485
Converter
DI
DIDO DO