9
4
Interface Specifications
RS-232C Interface (COM1/COM2/COM3/COM4)
Pin No.
Signal
Name
Pin No.
Signal
Name
1
CD
6
DSR
2
RXD
7
RTS
3
TXD
8
CTS
4
DTR
9
RI/+5V
5
GND
Dsub 9 pin (Male)
Screw Size:
(4-40): Inch Type
1 2 3 4 5
6 7 8 9
Changing number 9 pin’s [+5V/RI] can only be done for COM1, or COM3.
With COM2 and COM4, only [RI] is available. To change the COM1 or COM3
[+5V/RI] setting, remove the PS-B unit’s cover and locate the changeover
switch on the side of the main circuit board. The factory setting is to [RI].
• Be sure to confirm what settings will be used by the other device
and set the dip switches accordingly. Failure to do so can result in
a unit malfunction or damage.
• Whenever changing the PS-B changeover switches, be sure to
first turn the PS-B’s power supply OFF. Failure to do so can cause
a PS-B malfunction.
PS-2000B Series User Manual 1.4.1 RS-232C Interface
• The GND terminal is the signal ground. Be sure to connect the PL
unit’s GND terminal to the other unit’s SG (signal ground).
• FG and SG terminals are internally connected in the PS-B. When
connecting to another device, be sure to create an SG shorting
loop in your system.
