Contec COM-1PD(USB)H - 3 External Connection; Interface Connectors

3. External Connection
COM-1PD(USB)H
21
3. External Connection
This chapter describes the interface connectors on the converter.
Check the information available here when connecting an external device.
Interface connectors
TxD + Transmit Data+
RTS - Request to Send-
RTS + Request to Send+
TxD - Transmit Data-
SG Signal Ground
1
2
3
4
5
6
7
8
9
Receive Data- RxD-
Receive Data+ RxD+
Clear to Send+ CTS+
Clear to Send- CTS -
Figure 3.1. Pin assignment of interface connectors
CAUTION
For TxD, RxD, and RTS, pin assignment has even-numbered pins for positive and odd-numbered
ones for negative. For CTS, however, even-numbered and odd-numbered pins are assigned for
negative and positive, respectively, in contrast with other signals. This is not a description error.