Omron NT631C manual Port selection selector switch Set this to RS-422A Supply

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

C1000H/C2000H Rack-mounting Unit: C500-LK203

Setting the Rear Switches

• I/O port selection (selector switch) Set this to RS-422A.

5 V supply
ON
OFF	8	SW1
I/O port	7
	6
RS-422A	5
RS-232C	4
	3
Synchronization	2
	1
Internal	ON
External
Terminator	8
	7
OFF
	6	SW2
ON
	5
CTS	4
	3
0 V	2
External	1
	ON

•Unit #, parity, and transfer code (DIP SW1-1 to SW1-7)

Set SW1-1 to SW1-7 to OFF (0).

•Synchronization (selector switch) Set this to Internal.

•Communications speed (DIP SW2-1 to SW2-4)

Set these switches to 0010 to select 19,200 bps.

Set these switches to 1010 to select 9,600 bps.

(0: OFF 1: ON)

•1-to-1/1-to-N selection (DIP SW2-6) Set SW2-6 to OFF (0) (1-to-N).

•Instruction level (DIP SW2-7, SW2-8) Set these switches to ON (1). (Levels 1, 2, and 3 are enabled.)

•CTS selection (selector switch) Set this always to 0 V (ON).

•Terminator setting (selector switch) Set this switch to ON.

C200H/C1000H/C2000H CPU-mounting Unit: 3G2A6-LK202-EV1

Setting the Rear Switches

SW1

SW2

SW3

•Unit #, parity, and transfer code (DIP SW1-1 to SW1-5)

Set SW1-1 to SW1-5 to OFF (0).

*Parity is fixed at Even Parity. Transfer code is fixed at ASCII 7 data bits and 2 stop bits.

•Communications speed (DIP SW2-1 to SW2-4) Set these switches to 0010 to select 19200 bps. Set these switches to 1010 to select 9600 bps.

(0: OFF 1: ON)

•1-to-1/1-to-N selection (DIP SW2-6) Set SW2-6 to OFF (0) (1-to-N).

•Instruction level (DIP SW2-7, SW2-8)

Set these switches to ON (1). (Levels 1, 2, and 3 are enabled.)

•Terminator setting (DIP SW3-1 to SW3-6) Set SW3-1, SW3-3, and SW3-5 to ON (1). Set SW3-2, SW3-4, and SW3-6 to OFF (0). (Set terminator ON.)

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