2-9
2 Installation
3 Interface Specifications
3.1 Serial Interface
The PS-G unit’s COM1 and COM2 interfaces are used for connecting RS-232C cables.
Pin Configuration
(Viewed from the connector face.)
COM1
COM2
1
5
6
9
Pin Number
Signal Name
Description
Direction
1
CD
Carrier Detect
Input
2
RD (RXD)
Receive Data
Input
3
SD(TXD)
Send Data
Output
4
ER(DTR)
Data Terminal Ready
Output
5
SG
Signal Ground
-
6
DR(DSR)
Data Set Ready
Input
7
RS(RTS)
Request Send
Output
8
CS(CTS)
Clear Send
Input
9
CI(RI)
Call Indication
Input
Pin Number
Signal Name
Description
Direction
1
NC
Not Connected
-
2
RD(RXD)
Receive Data
Input
3
SD(TXD)
Send Data
Output
4
NC
Not Connected
-
5
SG
Signal Ground
-
6
NC
Not Connected
-
7
RS(RTS)
Request Send
Output
8
CS(CTS)
Clear Send
Input
9
VCC
+5V (for external supply)
-
