Precision Digital PD6300 - Manual (Page 14)

Model PD6300 Pulse Input Rate/Totalizer Instruction Manual
14
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
or transmitter always on for RS-422 communication
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 PD6000/PD7000 Modbus Register Tables located at
www.predig.com for details.
PDA1044 Digital Input & Output Expansion Module
CHANNELS 4 digital inputs & 4 digital outputs per module
SYSTEM Up to 2 modules for a total of 8 inputs & 8 outputs
DIGITAL INPUT
LOGIC HIGH 3 to 5 VDC
DIGITAL INPUT
LOGIC LOW 0 to 1.25 VDC
DIGITAL OUTPUT
LOGIC HIGH 3.1 to 3.3 VDC
DIGITAL OUTPUT
LOGIC LOW 0 to 0.4 VDC
SOURCE
CURRENT 10 mA maximum output current
SINK
CURRENT 1.5 mA minimum input current
+5 V
TERMINAL To be used as pull-up for digital inputs only.
Connect normally open contacts across +5 V & DI 1-4.