Connecting To The Rs-232C Serial Port On The Cpu Unit; A-4-1 Rs-232C Port Specifications - Omron CJ2 User Manual

A-4 Connecting to the RS-232C Serial
Port on the CPU Unit
This appendix provides connection diagrams and wiring methods for making an RS-232C cable to con-
nect to the serial port on the CPU Unit.
A-4-1 RS-232C Port Specifications
Connector Pin Arrangement
Pin No.
1
2
3
4
5
6
7
8
9
Connector hood
Precautions for Correct Use Precautions for Correct Use
Do not use the 5-V power from pin 6 of the RS-232C port on the CPU Unit for anything but the
NT-AL001-E Link Adapter. The external device or the CPU Unit may be damaged.
Communications Specifications
Item
Communications method
Synchronization
Baud rate
Transmission distance
Interface
Protocol
*1 Baud rates for the RS-232C are specified only up to 19.2 kbps. The CJ Series supports serial communications
from 38.4 kbps to 115.2 kbps, but some computers cannot support these speeds. Lower the baud rate if nec-
essary.
CJ2 CPU Unit Hardware User's Manual
Signal
FG Protection earth
SD (TXD) Send data
RD (RXD) Receive data
RS (RTS) Request to send
CS (CTS) Clear to send
5 V Power supply
DR (DSR) Data set ready
ER (DTR) Data terminal ready
SG (0 V) Signal ground
FG Protection earth
Half duplex
Start-stop
0.3/0.6/1.2/2.4/4.8/9.6/19.2/38.4/57.6/115.2 kbps
15 m max.
EIA RS-232C
Host Link, NT Link, 1:N, No-protocol, or Peripheral Bus
Name Direction
---
Output
Input
Output
Input
---
Input
Output
---
---
Specification
*1
Appendices
6
9
5
A-101