Micromod MOD: MODCELL Multiloop Processor 2002N Model C and User Manual Page 65

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MODCELL Multiloop Processor
COMMUNICATIONS CONNECTIONS
Figure 4-8. Typical Modbus Connections for a 4-Wire Master with 2-Wire Slaves
Isolated +5Vdc
2034N RS-485 MODULE
(Module Locations 31 & 32)
Modbus Master
560
Ohm
TERM
Switch
YES
RXTX-
RXTX+
S32
BASE INSTRUMENT
LOWER
TERMINAL
HOUSING
2032N RS-485, 2-Wire MODULE
(Module Location 32)
1
22
1
120 Ohm
Other 2-Wire Slaves
Modbus Slave
RX-
RX+
Last 2-Wire Slave
Note: All resistors are 0.25W
TX-
TX+
S32
S31
1
2
1
2
BASE INSTRUMENT
See Figure 2-23
Isolated
Common
120 Ohm
59
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