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Page 40
OCF 6.1 Open Channel Flow Monitor
MODBUS® COMMUNICATION
MODBUS® serial interface connections are made at the RS485 card’s terminal block if your OCF 6.1
was ordered with this card, or if one was added after installation. Card location:
AC
L N
NO
C
NC
NO
C
NC
–
+
4-20mA
FLOW
RLY2
RLY1
N
C
C N
O
N
C
C N
O
N
C
C N
O
N
C
C
N
O
RLY3
RLY4
RLY5
RLY6
EXTRA RELAYS OPTION
POWER
INPUT
HEATER OPTION
AC
GND
SERIAL COMMUNICATION
RS-485
Output
+ G
SENSOR
CORE
WHT
SHLD
GRN