Appendices
A-38
CP1E CPU Unit Hardware User’s Manual(W479)
The CJ1W-CIF11 RS-422A Conversion Unit is used to convert an RS-232C port to RS-422A/485.
It is directly connected to the built-in RS-232C port of the CP1E N-type CPU Unit.
The Conversion Unit is not insulated, so the maximum distance for RS-422A/485 is 50 m.
z Appearance
z Electrical Specifications
• RS-422A/485 Terminal Block
• RS-232C Connector
* The hood and the connector hood to which it is connected will have the same electrical potential.
z DIP Switch for Operation Settings
*1 Set both pins 2 and 3 to either ON (2-wire) or OFF (4-wire).
*2 To disable the echo-back function, set pin 5 to ON (RS control enabled).
*3 When connecting to a device on the N side in a 1: N connection with the 4-wire method, set pin 6 to ON (RS
control enabled).
Also, when using 2-wire connections, set pin 6 to ON (RS control enabled).
CJ1W-CIF11 RS-422A Conversion Unit
Signal
RDA-
RDB+
SDA-
SDB+
FG
Pin Signal
1FG
2RD
3SD
4CS
5RS
6+5V
7,8 NC
9SG(0V)
Hood NC*
Pin Setting ON OFF
1 Terminating resistance selec-
tion
Terminating resistance connected
(both ends of transmission path)
Terminating resistance
not connected
2
2-wire or 4-wire selection*
1
2-wire connections 4-wire connections
3
2-wire or 4-wire selection*
1
2-wire connections 4-wire connections
4 Not used. −−
5
RS control selection for RD*
2
RS control enabled RS control disabled
(Data always received.)
6
RS control selection for SD*
3
RS control enabled RS control disabled
(Data always sent.)
RDA- RDB+ SDA- SDB+ FG
RDA-
RDB+
SDA-
SDB+
FG
+5V 6
– 7
– 8
SG(0V) 9
1 FG
2 RD
3 SD
4 CS
5 RS
RS-232C port Connector pin
arrangement
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