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APP - 22 APP - 22
MELSOFT
A
PPENDICES
Appendix 3.2 QnA Series
(1) For large-scale QC24(N)
(a) Example of connection to an external device that allows the
CD signal(No.8 pin) to be turned ON/OFF
Large-scale QC24(N) Side Personal Computer Side
Signal Name Pin No.
Cable Connection and Signal Direction
(Full-/Half-Duplex Communication)
Signal Name
FG 1 FG
SD(TXD) 2 SD(TXD)
RD(RXD) 3 RD(RXD)
RS 4 RS
CS(CTS) 5 CS(CTS)
DSR(DR) 6 DSR(DR)
SG 7 SG
CD 8 CD
DTR(ER) 20 DTR(ER)
DC code control or DTR/DSR control is enabled by connecting the
QC24(N) to an external device as shown above.
(b) Example of connection to an external device that dose not
allow the CD signal(No.8 pin) to be turned ON/OFF
Large-scale QC24(N) Side Personal Computer Side
Signal Name Pin No.
Cable Connection and Signal Direction
(Full-Duplex Communication)
Signal Name
FG 1 FG
SD(TXD) 2 SD(TXD)
RD(RXD) 3 RD(RXD)
RS 4 RS
CS(CTS) 5 CS(CTS)
DSR(DR) 6 DSR(DR)
SG 7 SG
CD 8 CD
DTR(ER) 20 DTR(ER)
DC code control or DTR/DSR control is enabled by connecting the
QC24(N) to an external device as shown above.