Interface Specifications; Serial Interfaces (Com1/Com2) - Pro-face PS-3650A Series Hardware Manual

PS-3650A/PS-3651A Series Hardware Manual

2.3 Interface Specifications

This section describes the specifications of each interface of the PS-A Series unit.
2.3.1

Serial Interfaces (COM1/COM2)

The PS-A unit side connector is a D-Sub 9 pin plug type.
Use #4-40 (UNC) for connections.
COM1
COM1 can be changed to RS-232C, RS-422 or RS-485. (The factory setting is RS-232C.) To change this
setting, open the PS-A unit's Fan Unit or Memory Slot Cover and set the DIP Switches on the circuit board to
the desired position.
2.4 DIP Switches (page 2-14)
SEE
Pin
Arrangement
5
1
(PS-A side)
*1 To change pin #9's RI/+5V setting, open the PS-A unit's Fan Unit or Memory Slot Cover and
set the slide Switch to the desired position. Please refer to 2.4 DIP Switches (page 2-14)
2-8
• Do not connect any pins to [NC].
• Connect the FG terminal line to the shell.
• 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 pin #5 SG (Signal Ground) terminal.
• FG and SG terminals are internally connected in the PS-A unit. When connecting
to another device, be sure not to create an SG shorting loop in your system.
• Make sure to turn off the power supply before using the DIP Switches. Adjusting
the DIP Switches while power is supplied may cause malfunction.
Pin No.
Signal Name
1
2 RD(RXD)
3
4 ER(DTR)
5 GND(SG)
9
6 DR(DSR)
6
7
8
9 CI(RI)/+5V
Shell
Direction
CD Input
Input
SD(TXD) Output
Output
-
Input
RS(RTS) Output
CS(CTS) Input
Input/
*1
Output
FG -
RS-232C
Description
Carrier Detect
Receive Data
Send Data
Data Terminal Ready
Signal Ground (SG)
Data Set Ready
Request to Send
Send Possible
Called status display/+5V Output
(Switching available)
Frame Ground (Common with
SG)