Omron CJ - 08-2008 - Page 705

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Connecting to the RS-232C Port on the CPU Unit Appendix F
Although this wiring is different from that shown in the example above, it can be used to increase
noise immunity if required.
2. When the NT-AL001 Link Adapter is connected to the RS-232C port on the CPU Unit, 5 V is supplied
from pin 6, eliminating the need for a 5-V power supply.
3. Do not use the 5-V power from pin 6 of the RS-232C port for anything but the NT-AL001 Link Adapter.
Using this power supply for any other external device may damage the CPU Unit or the external de-
vice.
4. The XW1Z-@@0T-1 Cable is designed to connect the NT-AL001 and contains special wiring for the
CS and RS signals. Do not use this cable for any other application. Connecting this cable to other
devices can damage them.
DIP Switch Settings on the NT-AL001 Link Adapter
There is a DIP switch on the NT-AL001 Link Adapter that is used to set RS-422A/485 communications param-
eters. Set the DIP switch as required for the serial communications mode according to the following table.
Note Turn OFF pin 5 and turn ON pin 6 when connected to a CJ-series CPU Unit.
1
2
3
4
5
6
7
8
9
FG
SD
RD
RS
CS
5V
DR
ER
SG
FG
1
3
2
4
5
6
7
8
9
RD
SD
RS
CS
5V
DR
ER
SG
FG
PC
NT-AL001
Shell
Not
used.
Shield
Shell
Signal
name
Signal
name
Wiring with XW2Z-@@OT-1 (10 conductors)
Internal signals
Arrows indicate signal directions
Returned
Returned
Pin
No.
Pin
No.
Pin Function Default setting
1 Not used. (Leave set to ON.) ON
2 Internal terminating resistance setting.
ON: Terminating resistance connected.
OFF: Terminating resistance not connected.
ON
3 2-wire/4-wire setting
Both pins ON: 2-wire communications
Both pins OFF: 4-wire communications
OFF
4 OFF
5 Communications mode (See note.)
Both pins OFF: Always send.
5 OFF/6 ON: Send when RS-232C’s CS is high.
5 ON/6 OFF: Send when RS-232C’s CS is low.
ON
6 OFF