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Hardware Information
Serial Port
The serial port (COM1) on the PG 760 has the following pinout:
(PLC/V.24/Modem)
Figure 7-6
2
3
4
5
6
7
8
9
10
18
19
20
21
22
1
11-17
23-25
7-12
Serial Port COM1 (Socket Connector)
Pin No.
Designation
TxD (D1)
Serial transmit data
RxD (D2)
Serial receive data
RTS (S2)
Request to send
CTS (M2)
Clear to send
DSR (M1)
Data set ready
GND (E2)
Functional ground (reference
potential)
DCD (M5)
Data carrier detect
+TTY RxD
TTY receive
-TTY RxD
TTY receive
+TTY TxD
TTY send
+20mA
Isolated current source
DTR (S1)
Data terminal ready
-TTY TxD
TTY send
RI (M3)
Incoming call
-
Shield
-
Unassigned
-
Unassigned
1
14
25
13
Description
Output
Input
Output
Input
Input
-
Input
Input
Input
Output
-
Output
Output
Input
-
-
-
PG 760 PII Programming Device
C79000-G7076-C766-01
Input/Output
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