LSIS XGL-C22A, User Manual, Page: 31 / 299

Chapter 3 Performance Specifications
3-4
(1) How to connect RS-232C connector during modem connection
This module can communicate with devices of long distance as connected with modem. Modem and RS-232C channel shall
be connected as in [Fig. 3.4.2] below.
Cnet (9-PIN)
Connection No. and signal direction
Modem side (25-PIN)
Pin No. Name Name Pin No.
1 CD CD 8
2 RXD RXD 3
3 TXD TXD 2
4 DTR DTR 20
5 SG SG 7
6 DSR DSR 6
7 RTS RTS 4
8 CTS CTS 5
9 RI
[Note]
RI 22
[Fig 3.4.2] Cable Connection between RS-232C and Modem
[Note] No.9, RI signal is not used in Cnet I/F module.
(2) How to connect connector for RS-232C in null modem mode
In null modem mode, the connector can be connected in 3-line type as below.
Cnet (9-PIN)
Connection No. and signal direction
Computer/communication
devices
Pin No. Name
Name
1 CD CD
2 RXD RXD
3 TXD TXD
4 DTR DTR
5 SG SG
6 DSR DSR
7 RTS RTS
8 CTS CTS
9 RI RI
[Fig. 3.4.3] 3-line Type of Connection (no handshake)