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Micromod MOD: MODCELL Multiloop Processor 2002N Model C and Associated Hardware User Manual

Page 64

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MODCELL Multiloop Processor

COMMUNICATIONS CONNECTIONS

Figure 4-7. Typical Modbus Connections for 2034N RS-485, 4-Wire Module used as a Master

Isolated +5Vdc

2034N RS-485 MODULE
(Module Locations 31 & 32)

560

Ohm

TERM

Switch

YES

Isolated +5Vdc

TX

-

TX+

S32

BASE INSTRUMENT

LOWER

TERMINAL

HOUSING

2034N RS-485 MODULE
(Module Locations 31 & 32)

1

2

2

1

120

Ohm

Other Slaves

Modbus Slave

TX

-

TX+

120

Ohm

Last Slave

Note: All resistors are 0.25W

RX

-

RX+

S31

13

14

2

1

560

Ohm

TERM

Switch

NO

120

Ohm

RX

-

RX+

120

Ohm

S31

S32

1

2

1

2

BASE INSTRUMENT

Modbus Master

Isolated
Common

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