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ROC800-Series Instruction Manual

5-12

Communications

Revised Jul-14

Terminations are required on the two EIA-422/485 (RS-422/485)

communication modules located at the extremities of the circuit. That is

to say, the two outside modules require terminations in order to

complete the communication circuit.

Figure 5-5. EIA-422/485 (RS-422/485) Jumpers

Table 5-10. EIA-422 (RS-422) Module

Jumper

Terminated

Not Terminated

TER

Out

Half

Full TER Out

Half

Full

J3

x

x

J4

x

x

J5

x

x

J6

x

x

Table 5-11. EIA-485 (RS-485) Module

Jumper

Terminated

Not Terminated

TER OUT Half

Full TER OUT Half

Full

J3

x

x

J4

x

x

J5

x

x

J6

x

x