Instruction Manual

Trident Model PD765 Universal Input Meter Instruction Manual

Isolated 4-20 mA Transmitter Output

OUTPUT RANGE 1.00 to 23.00 mA typical

CALIBRATION Factory calibrated for 4-20 mA

SCALING RANGE 0.00 to 23.99 mA for any display range,

see output range above

ACCURACY ± 0.1% FS ± 0.004 mA

TEMPERATURE

DRIFT

0.4 uA/°C from 0 to 65°C ambient

Note: Analog output drift is separate from input drift.

ISOLATED

TRANSMITTER

POWER SUPPLY

One or two transmitter power supplies (Optional)

P1: 24 VDC ± 10% @ 200 mA max. (-1 option)

P1 & P2: 24 VDC ± 10% @ 200 mA & 40 mA max. (-2 option)

EXTERNAL LOOP

POWER SUPPLY

35 VDC maximum

OUTPUT LOOP

RESISTANCE

Power supply Minimum Maximum

24 VDC

10 Ω 700 Ω

35 VDC (external)

100 Ω 1200 Ω

Serial Communications

METER

ADDRESS

PDC protocol: 0 - 99

Modbus protocol: 1 - 247

BAUD RATE 300 – 19,200 bps

TRANSMIT

TIME DELAY

Programmable between 0 and 199 ms

DATA 8 bit (1 start bit, 1 stop bit)

PARITY None (1 or 2 stop bits), even, or odd

(Modbus only; PDC protocol does not use parity)

BYTE-TO-BYTE

TIMEOUT

0.01 – 2.54 sec (Modbus only)

TURN AROUND

DELAY

Less than 2 ms (fixed)

Refer to PDC and Modbus Serial Communication Protocol manuals for

details. These can be downloaded from: www.predig.com.