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External Modem Kit – INSTRUCTION MANUAL
7ML19981DP02
Wiring Diagram for Connection to EnviroRanger ERS 500 (Wall Mount):
Accumass BW500/SF500:
Port 1 set-up parameters:
*(1) refers to the primary index (secondary index 0)
Parameter
Description
P770 (1)* = 3
Modbus RTU slave
P771 (1) = 1
Modbus slave address of 1
P772 (1) = 2
9600 baud
P773 (1) = 0
no parity
P774 (1) = 8
8 data bits
P775 (1) = 1
1 stop bit
P778 (1) = 1
modem attached
P779 (1) = 300
Modem inactivity timeout = 300
Note:
After setting Port 1 parameters for the BW500 and SF500, you must cycle
power to the unit for them to take effect.
19 RXD
RXD
DB-9
CONNECTOR
ERS 500
TERMINAL
BLOCK
GND
GND
20 TXD
TXD
21
22
6
2 1
5 3
4
8 7
