Omron CS1D DUPLEX SYSTEM - 10-2009 Operation Manual page 613

Connecting to the RS-232C Port on the CPU Unit
Connection Example to Programmable Terminal (PT)
Direct Connection from RS-232C to RS-232C
Duplex Connections to Standby and Active CPU Units for Continuous Communications when
Switching to Simplex Operation
NS-series PT
NS-AL002
RS-422A/485
CJ1W-CIF11
(RS-232C/RS-422A/485 Adapter)
Example for 4-wire Connections
To RS-232C port on
NS-series PT
DIP Switch Settings
SW1: ON (RS/CS controls)
SW2: OFF (4-wire)
SW3: OFF (4-wire)
SW4: ON (terminating resistance)
Note 1. The 4-wire connection methods must be used to enable the Programming Console function of the PT.
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.
CJ1W-CIF11 Adapters are
connected to both CPU Units.
D
(See note 2.)
P
L
NS-AL002
Signal Pin
name
No.
FG 1
RDB+ 2
RS-422A/
485 SDB+ 3
Interface
RSB+ 4
NC 5
RDA 6
SDA 7
RSA 8
Shields
CJ1W-CIF11
Pin Signal
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
Pin Signal
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
577