Proface APL3000B - Node Box PC - Manual (Page 29)

PS-3650A/PS-3651A Series Hardware Manual
2-8
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.
• 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.
SEE 2.4 DIP Switches (page 2-14)
• 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
Arrangement
Pin No.
RS-232C
Signal Name Direction Description
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(SG) - Signal Ground (SG)
6 DR(DSR) Input Data Set Ready
7 RS(RTS) Output Request to Send
8 CS(CTS) Input Send Possible
9 CI(RI)/+5V
*1
*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)
Input/
Output
Called status display/+5V Output
(Switching available)
Shell FG -
Frame Ground (Common with
SG)
9
6
5
1
(PS-A side)