Model: PD765-7R3-00

PD765 Trident Process & Temperature Digital Panel Meter

UL ListingEuropean Conformity
SKU: PD765-7R3-00
Product Type: 1/8 DIN Process & Temperature Digital Panel Meter
Inputs: Current (4-20 mA), Voltage (0-10 V), Thermocouple, RTD
Output Options: 4-20 mA Output
Power: 12-36 VDC, 12-24 VAC
Transmitter Power: None
Display Category: LED, Single Line
Display: 0.56" High, 4 Digits, Red LED
Approvals: CE, UL/C-UL
Warranty: 3 years
Product Family: PD765
Product Category: Digital Panel Meters
Product Application: Level, Pressure, Temperature, Process, Pump Control

Wiring Diagram:


  • 1/8 DIN Digital Panel Meter with NEMA 4X, IP65 Front
  • 4-20 mA, ± 10 V, TC & RTD Field Selectable Inputs
  • Easy Field Scaling in Engineering Units without Applying an Input
  • Full 4-Digit Display, 0.56" (14.2 mm) or 1.20" (30.5 mm)
  • Shallow Depth Case Extends Only 3.6" (91 mm) Behind Panel
  • Isolated 24 VDC @ 200 mA Transmitter Power Supply Option (AC Powered Models Only)
  • 2 Relays + Isolated 4-20 mA Output Options
  • Free PC-Based MeterView Programming & Monitoring Software
  • No Assembly Required
  • Sunlight Readable Display
  • Operating Temperature Range: -40 to 65°C (-40 to 149°F)
  • UL & C-UL Listed. E160849; UL 508 Industrial Control Equipment
  • Input Power Options: 85-265 VAC / 90-265 VDC or 12-36 VDC / 12-24 VAC
  • Duplex Pump Controller with Alternation Capability
  • External Contacts for Remote Button Operation (Trident X2 Only)
  • USB, RS-232, & RS-485 Serial Communication Adapters Options
  • Modbus RTU Communication Protocol Standard
  • Copy Meter Settings to Other Trident Meters
  • Password Protection
  • Max/Min Display
  • High & Low Alarms with Multiple Reset Actions
  • Wide Assortment of NEMA 4X Enclosures for up to Ten Meters
  • Light/Horn & Button Accessory for Trident X2
  • Control Station Accessory for Remote Operation of Trident X2
  • Stainless Steel Sun Hood Accessory Available
  • 3-Year Warranty


The Only 1/8 DIN Process & Temperature Meter You Will Ever Need

The PD765 Trident digital panel meter is one of the most versatile digital panel meters on the market and will satisfy a wide variety of process and temperature applications. The Trident can be field programmed to accept process voltage (0-5V, 1-5V, etc) and current (4-20 mA) inputs, 100 Ohm RTDs, and the four most common thermocouples.

One of the Trident’s most useful features is its ability to provide 24 VDC to power the transmitter’s 4-20 mA signal. It is housed in a shallow-depth, 1/8 DIN enclosure that features a NEMA 4X front panel and convenient mounting hardware. There are two power options for the Trident: 85 to 265 VAC or 12-36 VDC and the AC powered version can provide 24 VDC to power the transmitter if needed. Programming and setup can be performed with the four front panel pushbuttons, free MeterView software or using the Copy function.

Two relays and isolated 4-20 mA output options increase the utility of the Trident meter. The relays can be used for alarm or control applications. The 4-20 mA output provides an isolated retransmission of the input signal; especially useful for temperature inputs like thermocouples and RTDs.

The display height on the standard Trident meter is 0.56" (14.2 mm) and on the Trident X2 the display height is an astounding 1.2" (30.5 mm). The Trident X2 can be read easily from distances of up to 30 feet!

The intensity of the display on both versions of the Trident can be adjusted to compensate for various lighting conditions, including direct sunlight.

Both meters are available with all Trident features, although only the Trident X2 includes four external button contacts.


Front of PD765

Trident and Trident X2 Connections (rear view)

PD765-6R5-10 (Trident)

PD765 Trident Connections

Two SPDT relays; 24 V transmitter power; TC, RTD, 4-20 mA or 0-10 VDC inputs; 4-20 mA output

PD765-6X5-10 (Trident X2)

PD765 Trident X2 Connections

Two SPDT relays; 24 V transmitter power; TC, RTD, 4-20 mA or 0-10 VDC inputs; 4-20 mA output; four external button contacts

Advanced Display Features

Four Full Digits

The display on the Trident is four full digits which means it can display numbers up to 9999. Many digital panel meters have displays of only 3½ digits which means they can display only to 1999. In practical terms, this means the Trident can display type K thermocouples to 2300ºF and 4-20 mA signals up to 9,999.

Front Panel LEDs

The meter is supplied with two alarm points that include front panel LEDs to indicate alarm conditions. This standard feature is particularly useful for alarm applications that require visual-only indication.

Two Display Sizes

The display height on the standard Trident meter is 0.56" (14.2 mm) and on the Trident X2 the display height is an astounding 1.2" (30.5 mm). The Trident X2 can be read easily from distances of up to 30 feet!

Trident Display Sizes

Display & Toggle Maximum / Minimum Reading

The main function of the front panel buttons during operation is to display the maximum and minimum readings reached by the process or temperature inputs. The Trident allows you to toggle between the maximum and minimum readings of the process values. To display the maximum and minimum readings since the last reset/power-up, use the Up arrow/Max button.

PD765 X2 Display & Toggle Maximum Value Display & Toggle Maximum Value
PD765 X2 Display & Toggle Maximum Value Display & Toggle Minimum Value

No More Sun Glare On Your Panel Meter Display!

PDA18DINSH Sun Hood Accessory for 1/8 DIN Panel Meters

New PDA18DINSH Sun Hood

The PDA18DINSH Sun Hood improves the readability of 1/8 DIN digital panel meters when they are mounted in direct sunlight by shading the instrument from the sun.

The Sun Hood is made from 18 gauge 316 stainless steel and mounts between the 1/8 DIN digital panel meter and the panel. In addition, a gasket is provided that installs between the Sun Hood and the panel to provide a NEMA 4X seal to the panel. The whole assembly is held in place by the panel meter’s mounting brackets.

  • Provides Shade for 1/8 DIN Digital Panel Meters
  • Made from 18 Gauge 316 Stainless Steel
  • Easy Mounting Requires No Drilled Holes in the Panel
  • Includes Gasket to Maintain NEMA 4X Seal
PDA18DINSH Sunhood

Process & Temperature Inputs

The Trident is factory calibrated to accept 4-20 mA, ±10 VDC, type J, K, T, or E thermocouples and 100 Ω platinum RTDs. Process inputs can be scaled with or without applying an input for virtually any engineering units. Temperature inputs can be programmed to display in degrees Fahrenheit or Celsius and the type K thermocouple can display up to 2300°F.

Current & Voltage Inputs

Setting up the meter to accept a current or voltage input could not be easier. All setup is performed with the front panel buttons and there are no switches or jumpers to deal with.

Transmitter Powered by Internal Supply (optional)

Transmitter Powered by Internal Supply (optional)

Transmitter Powered by External Supply

Transmitter Powered by External Supply

Current Overload Protection

To protect the instrument from unexpected current overload, the current input circuit contains a resettable fuse. 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.

Thermocouple & RTD Inputs

Setting up the Trident to accept a thermocouple or RTD input is simply a matter of setting a switch at the rear of the case and selecting the input type from the menu. The meter accepts J, K, T, or E type thermocouples as well as two, three, or four-wire 100 Ω platinum RTDs.

Thermocouple and RTD Inputs

Temperature Inputs

The Trident meter accepts J,K,T or E thermocouples and 100 Ω platinum RTDs. For the T thermocouple and RTD, the user can display temperature to 1° or 0.1° resolution and the Type K thermocouple to 2300ºF. In addition, these meters will operate down to -40°C with only mininal loss of accuracy.

TypeRangeAcc (0-65°C)Acc (-40-0o°C)Resolution
J-58° to 1382°F
-50° to 750°C
K-58° to 2300°F
-50° to 1260°C
T-292° to 700°F
-180° to 371°C
1° or 0.1°
E-58° to 1700°F
-50° to 927°C
RTD-328o° to 1382°F
-200° to 750°C
1° or 0.1°

Isolated Transmitter Power Supplies

24 V @ 200 mA Transmitter Power Supply

24 V @ 200 mA Transmitter Power Supply

One of the most useful features of the Trident PD765 when it is AC powered is its built-in, isolated, 24 V @ 200 mA power supply to power the transmitter. This feature saves money by eliminating an external power supply and also simplifies wiring.

24 V @ 40 mA 4-20 mA Output Power Supply

24 V @ 40 mA 4-20 mA Output Power Supply

Not only can the AC powered PD765's power the 4-20 mA input signal, but an additional power supply of 24 V @ 40 mA is available on select models to power the 4-20 mA output.

Resettable Fuse Prevents Current Overload

Another very useful aspect of the Trident is that the current input is protected against current overload by a resettable fuse. 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.

Isolated 4-20 mA Transmitter Output

Isolated 4-20 mA Transmitter Output

The Trident's isolated 4-20 mA output option converts the Trident into a transmitter / loop isolator with a digital display; perfect for temperature applications!

Other Uses for Transmitter Power Supplies

Trident X2 Powers Both the Heater and 4-20 mA Input Signal

The most common use for these two power supplies is for the 200 mA transmitter power supply to power the field transmitter and 40 mA power supply to power the 4-20 mA output from the meter. However, these two power supplies can be used in other ways. For instance, some level transmitters require the use of a heated lens. The Trident’s 200 mA power supply could be used to power both the heated lens and the 4-20 mA signal from the transmitter.

External Power Supply for the Loop

External Power Supply for the Loop

For applications that require an external transmitter power supply, the same Trident is used and merely wired in a different fashion as the above diagrams illustrate.

4-20 mA Output & Relays

Isolated 4-20 mA Analog Output

There are several uses for the Trident’s isolated 4-20 mA output. For temperature applications, the isolated 4-20 mA output option turns the Trident X2 meter into a temperature transmitter with a huge display! For 4-20 mA input applications the isolated 4-20 mA output turns the Trident meter into a signal isolator with the convenience of local display of the process variable. The 4-20 mA output can also be reversed scaled.

Linear 4-20 mA Analog Output

For applications where the input was linearized by the Trident, the 4-20 mA output will represent that linearized value.

Convert Temperature Inputs to 4-20 mA Output with the PD765

The Trident X2, with the appropriate options, can be used as an isolated temperature transmitter with a big display by converting the thermocouple or RTD input into an isolated 4-20 mA output.

Convert Temperature Inputs to 4-20 mA Output with the PD765

The 4-20 mA output can be reversed scaled such that 4 mA represents the high value and 20 mA represents the low value. For instance, a 4-20 mA output signal could be generated as the meter went from 100.0 to 0.0.

PD765 Provides 500 V of Isolation on the Output

The inputs and outputs of the PD765 Trident are electrically isolated to prevent ground loops and make wiring easier. All inputs, outputs and power supplies are fully isolated from one another.

PD765 Provides 500 V of Isolation on the Output


AC powered versions of the Trident can provide 40 mA at 24 VDC to power the 4-20 mA output signal or an external power supply can be used:

4-20 mA Output & Input Signal Powered by Meter

4-20 mA Output & Input Signal Powered by Meter

4-20 mA Output Powered Externally

4-20 mA Output Powered Externally

MeterView Software Programming
Analog Output Options

When a meter is programmed as shown to the left, the output will be 4.00 mA when the display reads 0.0 and the output will be 20.00 mA when the display reads 150.0.

Analog Output Options

The meter can be set up for reverse scaling as shown to the left: the output will be 4.00 mA when the display reads 150.0 and the output will be 20.00 mA when the display reads 0.0

Sensor Break: Analog output value when TC or RTD sensor break is detected.

Relays for Alarm & Control Applications

Adding relays to the Trident meter turns it into a sophisticated alarm device as well as a powerful, yet simple, alternative to a more complicated PLC system for control applications. One such application would be pump control using the Trident’s relays in pump alternation mode. The Trident can be equipped with two 3 A Form C (SPDT) internal relays. The relays are highly user-configurable as the following screen shot from MeterView indicates:

Relay/Alarm Configuration Screen
  • Program Set and Reset Points (HI / LO Alarms)
  • Reset the Relays (Mode in MV)
  • Time Delay (On and Off)
  • Relays Auto Initialization
  • Signal Loss Relay Operation (Sensor Break)
  • User Selectable Fail-Safe Operation

Relay connections are made to a six-terminal connector labeled RELAY1 and RELAY2.

Relay Connections

Pump Controller with Dual-Pump Alternation

The PD765 can be used as a low-cost pump controller when combined with a continuous level transmitter. One of the most common pump control application is shown below: controlling and alternating two pumps. The goal is to control the level between 1000 and 6000 gallons. The main pump turns on when the level reaches 6000 gallons and pumps down to 1000 gallons and then shuts the pump off. The next cycle, the backup pump turns on at 6000 gallons and shuts off at 1000 gallons. If at any time the active pump can’t keep the level below 7000 gallons, the other pump would come on also.

Pump Alternation Step 1

Relay #1 turns the main pump on at 6000 gallons and turns it off at 1000 gallons.

Pump Alternation Step 2

With the Pump Alternation feature activated, the next time the level reaches 6000 gallons relay #2 starts the backup pump.

Pump Alternation Step 3

If the active pump is not able to keep up, and the level reaches 7000 gallons, the other relay will start the inactive pump as well.

Pump Alternation Step 4

When the level falls below 1000 gallons both pumps will turn off.

Physical Features

The PD765 Trident is designed for ease-of-use in industrial applications. It is housed in a shallow depth case and includes a NEMA 4X front panel, wide operating temperature range, removable screw terminal connectors, snap in place mounting brackets, forgiving panel cutout requirement, and UL Listing for electrical safety. All of these features are backed by a 3-year warranty.

Wide Operating Temperature Range

Wide Operating Temperature Range

The Trident can operate from -40 to 65°C (-40 to 150°F) meaning it can be installed in a wide variety of indoor and outdoor industrial applications. And over this range, the Trident will drift no more than 0.005% of calibrated span/°C max from 0 to 65°C ambient and 0.01% of calibrated span/°C max from -40 to 0°C ambient.

Removable Screw Terminals

Removable Screw Terminal Connectors

Industrial applications require screw terminal connections for easy field wiring and the Trident goes one step further in convenience by making them removable also.

Forgiving Panel Cutout

Forgiving Panel Cutout Requirement

The Trident's bezel has been oversized to allow for not perfectly executed panel cutouts where NEMA 4X seal is not required.

Mounting Brackets

Secured-in-Place Rugged Mounting Brackets

If you’re installing the Trident outdoors in the hot or cold weather, the last thing you want to do is fumble around with mounting brackets that don’t stay in place. The Trident's mounting brackets can be easily secured into place and then screwed down to the panel. These brackets are rugged so they can be tightened to the panel to provide a solid NEMA 4X seal.

Type 4X / NEMA 4X Front Panel

Type 4X / NEMA 4X Front Panel

Not only does the Trident’s front panel UL Type 4X approval indicate it is waterproof, but it also indicates it is rugged. Part of the UL Type 4X test is to drop a 2-inch solid stainless steel ball from 8 feet on top of the meter’s faceplate.

Operational Features

Three Front Panel Button Operations

The main function of the front panel buttons during operation is to display the maximum and minimum readings reached by the process or temperature inputs as well as acknowledge relays.

The following buttons can perform these functions:

Front Panel Button Operations

External Button Contacts Available on Trident X2

The Trident X2 is equipped with four external button contacts that can be used to remotely operate the Trident X2’s frontpanel buttons.

For instance, these button contacts can be used to program the meter and to remotely acknowledge/reset the relays:

External Button Contacts Available on Trident X2

The external button contacts are particularly useful for wiring up a remote button to reset the relays as shown here:

Reset Button

Plastic Control Stations for Trident X2

The PDA2360 series of plastic control stations provide a convenient way to remotely program the Trident X2 meter via its four external button contacts. In addition, they also provide a means to acknowledge the relays with a remotely mounted button.

  • Complete Pre-Assembled Stations
  • Normally Open (NO) Spring Return Plastic Bezel Pushbuttons
  • Trigger Action Turn to Release Pushbutton (PDA2360-E only)
  • Control Station for Remote Operation of Light/Horn Button
  • IP65 / NEMA 4, 4X and 13 Rated
  • Wall Mountable
Plastic Control Stations for Trident X2
PDA2360 Series Control Stations
PDA2360-EEmergency Stop Button
PDA2361-A1 Black Ack Button
PDA2361-Q1 Black Silence Button
PDA2364-MRUE4 Black Buttons: Menu, Right, Up, Enter

Four-Position Control Station for Remote Operation of Trident PD765 X2 Buttons

The Trident PD765 X2's four programming and operations buttons can be remotely controlled by using the PDA2364-MRUE 4-button control station accessory as shown in the diagram below.

Four-Position Control Station for Remote Operation of Trident PD765 X2 Buttons

Light/Horn & Button Mounted to Enclosure

Light / Horn & Reset Button Mounted to Enclosure

Precision Digital offers a wide variety of NEMA 4 and NEMA 4X enclosures that can be equipped with MOD-LH Light/Horn and Button. When MOD-LH is ordered, the accompanying enclosure on the order comes with the holes pre-drilled for the Light/Horn and the Button and the user performs the mounting and wiring. Meter and enclosure are sold separately. The Light/Horn and the Button can also be ordered as separate items and the user performs all holedrilling, mounting and wiring as desired.

The light and horn can be controlled independently of each other via separate relays on the Trident X2 meter; and since the meter's relays can be reset in a variety of ways, there are several ways the Light/Horn option can operate. For instance, the horn can be programmed to silence at any time via the Button or front panel button on the Trident X2, and light to reset automatically when the alarm clears as the following table illustrates:

Relay #Connected toDefault Reset Mode
1Flashing Light(1)Auto reset
2HornSilence with Button at any time
  1. Light can be wired to flash or stay steady on
  2. See manual or data sheet for additional ways the relays can be programmed

Note: The Light / Horn accessory is powered from the 200 mA transmitter power supply; so when it is installed, there is less power available for the transmitter. See MOD-LH Light / Horn, Transmitter Power Supply specification in the manual or data sheet for details.

Light/Horn Dimensions

Units: Inches (mm)

Light / Horn Dimensions

What's Included

Check mark Light/Horn


Check mark Button

Button and 9 Labels

Check mark Enclosure Drilling

Hole Drilling on Enclosure

X mark Meter


X mark Enclosure


X mark Installation

Installation and Wiring

Meter and enclosure sold separately. User installation and wiring required.

Note: These specifications apply to the entire product series and may contain information that is not relevant to this particular model number.

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


DisplayTrident: 0.56" (14.2 mm);
Trident X2: 1.20" (30.5 mm) red LED,
4 digits (-1999 to 9999)
Display IntensityEight user selectable levels
Front PanelNEMA 4X, IP65; panel gasket provided
Programming MethodsFour front panel buttons, cloning with Copy feature, PC with MeterView software, and Modbus registers.
Noise FilterProgrammable 2 to 199 (0 will disable filter)
Display Update RateProcess/RTD: 3.7-5/sec; TC: 1.8-2.5/sec
OverrangeDisplay flashes 9999
UnderrangeDisplay flashes -1999
RecalibrationAll ranges are calibrated at the factory. Recalibration is recommended at least every 12 months.
Max/Min DisplayStored until reset by user or meter is turned off.
PasswordRestricts modification of programmed settings.
Non-Volatile MemorySettings stored for a minimum of 10 years.
Power Options85-265 VAC, 50/60 Hz; 90-265 VDC, 20 W max
or 12-36 VDC; 12-24 VAC, 6 W max.
Required FuseUL Recognized, 5 A max, slow-blow; up to 6 meters may share one fuse.
Normal Mode Rejection64 dB at 50/60 Hz
Isolation4 kV input/output-to-power line; 500 V input-to-output or output-to-24 VDC supplies. For -6R5 & -6X5 models only: 100 V output-to-24 VDC supply
EnvironmentalOperating Temperature: -40 to 65°C (-40 to 149°F)
Storage Temperature: -40 to 85°C (-40 to 185°F)
Relative Humidity: 0 to 90% non-condensing
ConnectionsPower & Signal: removable screw terminal blocks accept 12 to 22 AWG.
Serial: RJ11 header, standard on all meters.
Enclosure1/8 DIN, high impact plastic, UL 94V-0, color: gray
Tightening TorqueScrew terminal connectors: 5 lb-in (0.56 Nm)
Overall Dimensions4.68" x 2.45" x 4.19"
(119 mm x 62 mm x 106 mm)
(W x H x D)
Weight9.5 oz (269 g) (including options)
UL File NumberE160849; UL 508 Industrial Control Equipment
Warranty3 years parts and labor. See Warranty Information and Terms & Conditions for complete details.

Process Inputs

Inputs0-20 mA, 4-20 mA, 1-5 V, ±10 V
Transmitter Supply(AC powered Models only) Isolated, one or two transmitter supplies P1: 24 VDC ±10% @ 200 mA max (-10 option) P1 & P2: 24 VDC ±10% @ 200 mA & 40 mA max (-20 option)
Accuracy±0.05% FS ±1 count; ±0.1% FS ±2 counts for square root
FunctionLinear or square root
Low-Flow Cutoff0 to 9999 (0 disables cutoff function)
Point below at which display always shows zero.
Decimal PointUp to 3 decimals.
CalibrationScale without signal or calibrate with signal source
Calibration RangeUser programmable over entire range of meter
Input ImpedanceVoltage range: greater than 1 MΩ,
Current range: 50-100 Ω, varies with resettable fuse impedance
Input OverloadProtected by automatically resettable fuse
Temperature Drift

Input0 to 65º C ambient-40 to 0º C ambient
Current±0.20% FS (50 PPM/ºC)±0.80% FS
Voltage±0.02% FS (1.7 PPM/ºC)±0.06% FS

Temperature Inputs

InputsFactory calibrated, field selectable: type J, K, T, or E thermocouples and 100 Ω platinum RTD (0.00385 or 0.00392 curve)
Resolution1°; type T TC & RTD: 1° or 0.1°
Cold Junction ReferenceAutomatic
Temperature Drift±2°C maximum
Offset AdjustmentProgrammable to ±19.9°. This parameter allows the user to apply an offset value to the temperature being displayed.
Input ImpedanceGreater than 100 kΩ

TypeRangeAcc. (0-65ºC)Acc. (-40-0ºC)Resolution
J-58º to 1382ºF
-50º to 750ºC
K-58º to 2300ºF
-50º to 1260ºC
T-292º to 700ºF
-180º to 371ºC
1° or 0.1°
-58º to 1700ºF
-50º to 927ºC
RTD-328º to 1382ºF
-200º to 750ºC
1° or 0.1°

Relays Option

Rating2 Form C (SPDT); rated 3 A @ 30 VDC or 3 A @ 250 VAC resistive load; 1/14 HP (≈ 50 watts) @ 125/250 VAC for inductive loads such as contactors, solenoids, etc.
Deadband0-100% FS, user selectable
Electrical Noise SuppressionA snubber should be connected to each relay contact switching inductive loads to prevent disruption to the microprocessor’s operation. Recommended snubber value: 0.01 µF/470 Ω, 250 VAC (PDX6901).
High or Low AlarmUser may program any alarm for high or low
Relay Operation
  • Automatic (non-latching) and/or manual reset
  • Latching (requires manual acknowledge) with/without clear
  • Pump alternation control
  • Off (disable unused relays)
Relay ResetFront panel button, terminal at back of meter (X2 models only), or through serial communications
Time Delay0 to 199 seconds, on and off delays; programmable
Sensor Break Relay OperationThe sensor break relay condition may be programmed for each relay as On (alarm) or Off (nonalarm). The relays will enter these states when a sensor break is detected for RTD or thermocouple inputs. These settings have no effect when current or voltage inputs are selected.
Fail-Safe OperationProgrammable, independent for each relay. Relay coils are energized in non-alarm condition. In case of power failure, relays will go to alarm state.
Auto InitializationWhen power is applied to the meter, relays will reflect the state of the input to the meter.

Serial Communications

CompatibilityEIA-232, and EIA-485 with PDA7232 and PDA7422 Trident adapters.
ProtocolModbus RTU
Meter AddressPDC protocol: 0 to 99, Modbus protocol: 1 to 247
Baud Rate300 to 19,200 bps
Transmit Time DelayProgrammable 0 to 199 ms
Data8 bit (1 start bit, 1 stop bit)
ParityNone (1 or 2 stop bits), even, or odd
(Modbus only; PDC protocol does not use parity)
Turn Around DelayLess than 2 ms (fixed)
Refer to PDC and Modbus Serial Communications Protocol manuals for details.

Isolated 4-20 mA Transmitter Output

Scaling Range1.00 to 23.00 mA; reverse scaling allowed.
CalibrationFactory calibrated 4.00 to 20.00 mA
Accuracy±0.1% FS ±0.004 mA
Temperature Drift50 PPM/°C
Note: Analog output drift is separate from input drift
Isolation4 kV output-to-power line; 500 V inputto-output or output-to-24 VDC supplies.
For -6R5 and -6X5 models only: 100 V output-to-24 VDC supply
External Power35 VDC maximum
Output Loop Resistance
Power supplyMinimumMaximum
24 VDC10 Ω700 Ω
35 VDC (external)100 Ω1200 Ω
Additional 4-20 mA OutputsThe PD659-1MA-2MA can split the optional 4-20 mA output into two isolated 4-20 mA outputs
0-10 VDC OutputThe PD659-1MA-1V can convert the optional 4-20 mA output to a 0-10 VDC signal

PDA8006 Trident USB Adapter

PurposeTo be used only for programming the Trident meter
CompatibilityUSB 1.1, USB 2.0
ConnectorsRJ11, and USB Type B
CableOne 7' (2.1 m) standard modular cable and one 3.28' (1.0 m) USB A-B Male cable provided with adapter
Dimension1.7" x 0.8" x 3.3"
43 mm x 21 mm x 83 mm)
(W x H x D)
DistanceAdapter to:
PD765/PD8-765 meter: 7' (2.1 m) max;
USB connection to PC: 10' (3 m) max
Driver CompatibilityMicrosoft® Windows® 7/10/11
PowerUSB Port
Status IndicationSeparate LEDs for Power (P), Transmit (TX), and Receive (RX)

External Button Contacts (X2 Models Only)

FunctionRemote operation of front-panel buttons: programming, reset relays or view/reset max/min readings.
Open State+5 VDC open contact on button input terminals
Closed StateClosed contact button input terminal to common/ground, active low 0 to 0.4 VDC

MOD-LH Light/Horn

Available for these ModelsTrident X2 only
Light ColorsMOD-LH Models: Red, green, yellow, blue or white.
MOD-LH5CB1: User selectable: red, green, yellow, blue, or white
Light ActionCan be wired to flash (not available on MOD-LH5CB1) or stay steady on
Light/Horn & Button InstallationWhen MOD-LH is ordered with an enclosure, the user performs installation and wiring of Light/Horn and Button in predrilled holes.
Horn85 dB
Light/Horn IndependenceLight and horn can be controlled via separate relays
Power RequirementNo additional power required when wired to a Trident X2 meter.
When mounted remote: 24 VDC
Transmitter Power SupplyThe Trident X2's internal transmitter power supply is capable of supplying 24 VDC @ 200 mA to power the transmitter and other devices such as the Light/Horn. The following table illustrates how much of this current is required to drive various Light/Horns. If more current is needed, then consider the PDA1024-01.
MOD-LH and MOD-LH5CB1 Models:
ColorCurrent RequiredColorCurrent Required
Red17 mABlue15 mA
Green15 mAWhite42 mA
Yellow23 mAHorn20 mA
Example: 17 mA (Red Light) + 20 mA (Horn) = 37 mA total current needed from the 200 mA supply. Available current = 163 mA
Reset / Silence ButtonNEMA 4X; may be wired to the external button contacts on Trident X2. The Ack front panel button can be used to reset / acknowledge the relays.
Button LabelsThe Light/Horn accessory comes with 9 pre-printed message labels the user can affix under the red button: RESET, BATCH, ACK, TARE, SILENCE, STOP, START, PAUSE, START/STOP.
Light/Horn Mounting ConnectionM22
Hole SizesLight/Horn: 0.875" (22 mm); Button: 0.630" (16 mm)
Cable Length3.28 feet (1 meter)
Operating Temperature Range-5 to 40°C (23 to 104°F)

Compliance Information


UL Listed USA and Canada UL 508 Industrial Control Equipment
UL File NumberE160849
Front PanelUL Type 4X, NEMA 4X, IP65; panel gasket provided
Low Voltage DirectiveEN 61010-1
Safety requirements for measurement, control, and laboratory use

Electromagnetic Compatibility

EmissionsEN 55011
Group 1 Class A ISM emissions requirements
Radiated EmissionsClass A
AC Mains Conducted EmissionsClass A
EN 61326-1
Measurement, control, and laboratory equipment
EN 61000-6-2
EMC heavy industrial generic immunity standard
RFI - Amplitude Modulated80 -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 - Conducted10V, 0.15-80 MHz, 1kHz 80% AM
AC Surge±2kV Common, ±1kV Differential
Surge1KV (CM)
Power Frequency Magnetic Field30 A/m 70%V for 0.5 period
Voltage Dips40%V for 5 & 50 periods
70%V for 25 periods
Voltage Interruptions<5%V for 250 periods
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.

Note: This tab applies to the entire product series and may contain information that is not relevant to this particular model number.

MeterView Programming Software

MeterView software allows remote programming and data acquisition of the Trident series. The remote programming allows for all available meter settings to be programmed from a personal computer through an easy user-friendly interface. The data acquisition allows the user to gather readings from up to 100 meters at user-selected intervals and generate charts using common tools like Microsoft™ Excel.

Free MeterView Programming Software

Note: PD765 is not powered from USB connection and requires external power to be programmed.

For more information visit


Units: Inches (mm)

PD765 Dimesions - Side
PD765 Dimesions - Top
  1. Panel cutout required: 1.772 x 3.622 (45 x 92)
  2. Panel thickness: 0.040 – 0.250 (1.0 – 6.4)
  3. Mounting brackets lock in place for easy mounting
Download 3-D CAD Files


Connector Labeling

The connectors label, affixed to the meter, shows the location of all connectors available with requested configuration. It also identifies the location of the RTD/TC selector switch. The images below show all connector configurations for the PD765.


  1. The connector in the upper left of the diagram has different configurations based on the model.
  2. The Trident PD765 does not have external button contacts like the PD765 X2, so it cannot be used with the Light/Horn accessory.
PD765-6R0-00, PD765-7R0-00 Connections

PD765-6R0-00, PD765-7R0-00

PD765-6R0-10 Connections


PD765-6R2-00, PD765-7R2-00 Connections

PD765-6R2-00, PD765-7R2-00

PD765-6R2-10 Connections


PD765-6R3-00, PD765-7R3-00 Connections

PD765-6R3-00, PD765-7R3-00

PD765-6R3-10 Connections


PD765-6R3-20 Connections


PD765-7R5-00 Connections


PD765-6R5-10 Connections


PD765-6X0-00, PD765-7X0-00 Connections

PD765-6X0-00, PD765-7X0-00

PD765-6X0-10 Connections


PD765-6X2-00, PD765-7X2-00 Connections

PD765-6X2-00, PD765-7X2-00

PD765-6X2-10 Connections


PD765-6X3-00, PD765-7X3-00 Connections

PD765-6X3-00, PD765-7X3-00

PD765-6X3-10 Connections


PD765-6X3-20 Connections


PD765-7X5-00 Connections


PD765-6X5-10 Connections


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SKU: PD765-7R3-00
Stock: 10
Lead Time: 5 business days