Omron CS1D DUPLEX SYSTEM - 10-2009 Operation Manual page 610

Connecting to the RS-232C Port on the CPU Unit
Duplex Connections to Standby and Active CPU Units for Continuous Communications when
Switching to Simplex Operation with Duplex CPU Systems
RS-232C RS-422A/485
NT-AL001
terminating
resistance ON, 5-V
power required
Shield
Signal
name
RS-232C
FG
SD
RD
RS-232C
RS
Interface
CS
DR
ER
SG
(+)
5-V
power
( )
(See note.)
Note 1. 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.
2. The CJ1W-CIF11 does not provide isolation. The total length of the transmission path must therefore
be 50 m or less. If the transmission distance is greater than 50 m, use the NT-AL001, which provides
isolation, and do not include the CJ1W-CIF11 in the transmission path. When only the NT-AL001 is
used, the total length of the transmission path can be a maximum of 500 m. Also, connect the shield
to ground at one end of each cable.
574
CJ1W-CIF11 Adapters are
connected to both CPU Units.
(See note 2.)
D
P
L
CJ1W-CIF11
(RS-232C/RS-422A/485 Adapter)
NT-AL001 Link Adapter
Pin Signal Signal Pin
name name
No. No.
1 NC GRD 1
2 SD SG 2
3 RD SDB 3
4 RS SDA 4
5 CS RDB 5
6 5V RDA 6
7 DR CSB 7
8 ER CSA 8
9 SG
RS-232 RS-422
D-sub, 9-pin
connector
(male)
DIP Switch Settings
Pin 1: ON
Pin 2: ON (terminating resistance)
Pin 3: OFF
Pin 4: OFF
Pin 5: OFF
Pin 6: OFF
CJ1W-CIF11
Signal
Pin
name
No.
RS-422A/
1 RDA
To RS-232C port on
485
2 RDB+
standby CPU Unit
Interface
3 SDA
4 SDB+
5 FG
DIP Switch Settings
SW1: OFF (no terminating resistance)
SW2: OFF (4-wire)
SW3: OFF (4-wire)
SW4: OFF
SW5: OFF (no RS control for RD)
SW6: ON (RS control for SD)
CJ1W-CIF11
Signal
Pin
name
No.
RS-422A/ To RS-232C port on
1 RDA
485
active CPU Unit
2 RDB+
Interface
3 SDA
4 SDB+
5 FG
DIP Switch Settings
SW1: OFF (terminating resistance)
SW2: OFF (4-wire)
SW3: OFF (4-wire)
SW4: OFF
SW5: OFF (no RS control for RD)
SW6: ON (RS control for SD)
Appendix F