Appendices
A-112
CJ2 CPU Unit Hardware User’s Manual
z CP1W-CIF01 RS-232C Option Board Specifications
• Connector Pin Arrangement
Precautions for Safe 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 Link Adapter, CJ1W-CIF11 RS-422A Converter, or NV3W-M@20L Programmable Ter-
minal. The external device or the CPU Unit may be damaged.
z Communications Specifications
*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.
Pin No. Signal Name Direction
1 FG Protection earth ---
2 SD (TXD) Send data Output
3 RD (RXD) Receive data Input
4 RS (RTS) Request to send Output
5 CS (CTS) Clear to send Input
6 5 V Power supply ---
7 DR (DSR) Data set ready Input
8 ER (DTR) Data terminal ready Output
9 SG (0 V) Signal ground ---
Connector hood FG Protection earth ---
Item Specification
Communications method Half duplex
Synchronization Start-stop
Baud rate
0.3/0.6/1.2/2.4/4.8/9.6/19.2/38.4/57.6/115.2 kbps
*1
Transmission distance 15 m max.
Interface EIA RS-232C
Protocol Host Link, NT Link, 1:N, No-protocol, or Peripheral Bus
COMM
Front Back
1. Communications status indicators
2. RS-232C connector
3. CPU Unit connector
5
6
1
9
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