Connecting An Nt-Al001 Link Adapter - Omron NT20S-ST121B-EV3 User Manual

Connecting Link Adapters and RS-422A Converters
RS-422A/485 Cable Shield
Connections
2-3-2

Connecting an NT-AL001 Link Adapter

Note
28
When using the CJ1W-CIF11 (with or without the NT-AL001), connect the sig-
nal lines, shields, and grounds as shown in the following diagram.
CPU Rack
CPU Unit Power
or Commu-
Supply
nications
Unit
Unit
LG
GR
RS-422A/485 shield
connected at both ends
Signal line
The NS-AL001 Link Adapter connects to serial port A or B of the NT20 with an
RS-232C cable and converts the RS-232C communications to RS-422A or
RS-485. (Serial ports A and B cannot be used simultaneously.)
The NT20 supplies +5 V power (150 mA max.) to the Link Adapter through pin
6 of the RS-232C connector, so an external power supply is not required.
1. The RS-232C connector is insulated from the RS-422A/RS-485 connector
within the NT-AL001 Link Adapter.
2. Always turn OFF the NT20's power supply before installing/removing a
Link Adapter or connecting/disconnecting cables.
PT
CJ1W-CIF11
PT
CJ1W-CIF11
PT
CJ1W-CIF11
Section 2-3