Omron CP1E-E14SDR-A - Application Example

A-47
Appendices
CP1E CPU Unit Hardware User’s Manual(W479)
A-3 Wiring for Serial Communications
App
A-3-3 Converting the Built-in RS-232C Port to
RS-422A/485
z DIP Switch Setting
The NT-AL001 RS-232C/RS-422A Conversion Unit has a DIP switch for setting RS-422A/485
communications conditions.
When connecting the Serial Communications Option Board, refer to the DIP switch settings shown
in the following table.
* When connecting to a CP-series CPU Unit, turn OFF pin 5 and turn ON pin 6.
z Application Example
* DR and ER signals are not supported by the NS(1)-type CPU Unit.
Note The following cables can be used for this connection.
It is recommended that one of these cables be used to connect the RS-232C port on the Option Board
to the NT-AL001 RS-232C/RS-422 Conversion Unit.
Pin Function Factory setting
1 Not used. (Leave set to ON.) ON
2 Built-in terminating resistance setting
ON: Connects terminating resistance, OFF: Disconnects terminating resis-
tance
ON
3 2/4-wire setting
2-wire: Set both pins to ON, 4-wire: Set both pins to OFF
OFF
4 OFF
5 Transmission mode setting*
Constant transmission: Set both pins to OFF.
Transmission performed when CS signal in RS-232C interface is at high level:
Set pin 5 to OFF and pin 6 to ON.
Transmission performed when CS signal in RS-232C interface is at low level:
Set pin 5 to ON and pin 6 to OFF.
ON
6 OFF
Length Model numbers
70cm XW2Z-070T-1
2m XW2Z-200T-1
NT-AL001
3
2
4
5
6
7
8
9
RD
SD
RS
CS
+5V
DR
ER
SG
FG
4
3
6
5
1
SDA
SDB
RDA
RDB
GRD
RDA
RDB
SDA
SDB
RS-422
RDA
RDB
SDA
SDB
SD
RD
RS
CS
+5V
DR*
ER*
SG
FG
2
3
4
5
6
7
8
9
FG
RS-232C
CP1E N/NA(S)-type CPU Unit
Built-in RS-232C Port or RS-232C
Option Board
RS-232C/RS422A Conversion Unit
Pin Signal
Pin Signal PinSignal Signal
Shield
Hood
Hood
Remote device
Signal
Remote device
(See note)