Omron NT21 - SETUP MANUAL 10-2001 Setup Manual page 23

Method for Connection to the Host
Communication Communication
type at Host
Direct 1:1 connection
PT
RS-232C
1:N connection with RS-422A through Link Adapters
PT
RS-232C
1:N connection with RS-485 through Link Adapters
PT
RS-232C
Combinations of Communication Method and Connection Method
The connection methods that can be used depending on the communication
method used and the communications type for communication between the
NT21 and the host are indicated in the table below.
Usable Connection Method
RS-232C (max. 15 m)
NT-AL001* or
NS-AL002
Link Adapter
NT-AL001
Link Adapter
RS-422A RS-232C
(total length 500 m) (max. 2 m)
NT-AL001* or
NS-AL002
NT-AL001
Link Adapter
Link Adapter
RS-485
RS232C
(total length 500 m)
(max. 2 m)
Note *An RS-232C Cable (not shown in the diagram) is required when connecting an
NT-AL001 Link Adapter to a PT.
Usable Communication
Host
Link
Host
f
Host
Host
f: Connection possible
Section
Method
1:N
1:1 NT
Memory
NT
Link
link
Link
f f f
f
f
: Connection not possible
2-1
Details
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95
95
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