3 interface specifications, 3 interface specifications -7, Serial interface (com1,com2) – Proface APL3000B - Node Box PC User Manual
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Chapter 2 Specifications
2-7
2.1.3
Interface Specifications
This section describes the specifications of each interface of the PS-3450A Series unit.
Serial Interface (COM1,COM2)
COM1
• This PS-A unit’s serial port is not isolated. When the host (PLC) unit is also not
isolated, and to reduce the risk of damaging the RS-232C/RS-422/RS-485 circuit,
be sure to connect the #5 SG (Signal Ground) terminal.
Interfit Bracket
#4-40 (Inch screw thread)
Pin Arrangement
Pin No.
RS-232C
Signal Name
Direction
Meaning
1
CD
Input
Carrier Detect
2
RD(RXD)
Input
Receive Data
3
SD(TXD)
Output
Send Data
4
ER(DTR)
Output
Data Terminal Ready
5
GND
-
Signal Ground
6
DR(DSR)
Input
Data Set Ready
7
RS(RTS)
Output
Request to Send
8
CS(CTS)
Input
Clear to Send
9
CI(RI)
Input
Called status display
FG
FG
-
Frame Ground
(Common with SG)
9
6
5
1
(PS-A side)