User`s manual

218
8.4 Connector Connections for Half-duplex
Communications
The following explains the functions of the connector that connects the Q series C24 and external device when half-
duplex communications are used.
Connect the Q series C24 and external device based on (1) and (2) below.
(1) Connect the Q series C24 RS (RTS) signal to one of the external device half-
duplex communications signals (CS (CTS), DR (DSR), or CD (DCD) signal).
(2) Connect the Q series C24 CD (DCD) signal to one of the external device half-
duplex communications signals (RS (RTS) or ER (DTR) signal).
(3) The half-duplex communications described in this section cannot be
performed when an RS-232 and RS-422 converter is used.
(Connection example)
CD(DCD)
RD(RXD)
SD(TXD)
ER(DTR)
SG
DR(DSR)
RS(RTS)
CS(CTS)
CD(DCD)
RD(RXD)
SD(TXD)
ER(DTR)
SG
DR(DSR)
RS(RTS)
CS(CTS)
CI(RI)
1
2
3
4
5
6
7
8
9
Q series C24
Signal name
Pin No.
Cable connection and
signal direction
External device
Signal name