Omron NT631C manual 110

Connecting to the Host’s RS-422A/485 Port Section 5-2

Reference: • There are no Serial Communications Boards for the C200HX/HG/HE(-Z)E in which port B is the RS-422A/485 port.

•There are no Serial Communications Boards for the CQM1H in which port 1 is the RS-422A/485 port.

Setting the DIP Switches on a C200HX/HG/HE(-Z)E Communications

Board

Set the switches on a C200HX/HG/HE(-Z)E Communications Board as fol- lows.

Switch 1:

4

(4-wire = RS-422A), or

2

(2-wire = RS-485)

Switch 2: ON (terminator ON = terminating resistance enabled).

Setting Switches on a CQM1H Serial Communications Board

Set the switches on a CQM1H Serial Communications Board as follows.

2-wire or 4-wire selector (WIRE):

4

2

(4-wire = RS-422A), or

(2-wire = RS-485)

Terminating resistance switch (TERM): ON (terminator ON = terminating resistance enabled).

Serial Communications Board (Inner Board slot 1)

Terminator Switch (TERM)

Set to ON (right side)

Wire Selection Switch (WIRE)

When using RS-422A: Set to 4 (right side) for 4-wire type.

When using RS-485: Set to 2 (left side) for 2-wire type.

Connecting to CS-series Serial Communications Board

Serial Communications Board with RS-422A/485 port equipped for CS-series CPU Unit:

CS1W-SCB41(-V1) (Port 2 is an RS-422A/485 port.)

Setting the Front Switches

2-wire or 4-wire selector (WIRE):

4

2

(4-wire = RS-422A), or

(2-wire = RS-485)

Terminating resistance switch (TERM): ON (terminator ON = terminating resistance enabled).

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