Manual

Analog Panel Meter Instruction Manual
13
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 Modbus Register Tables located at www.dwyer-inst.com for
details.
PMA-12 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 pushbuttons across +5 V & DI 1-4.