
E-11
(RS-422)
Pin No. Signal Signal Name Direction
1 RXA Receive Data (+) Input
2 RXB Receive Data (-) Input
3 TXA Send Data (+) Output
4 NC No Connection -
5 GND Ground -
6 NC No Connection -
7 TXB Send Data (-) Output
8 NC No Connection -
9 NC No Connection -
FG FG Frame Ground -
(RS-485)
Pin No. Signal Signal Name Direction
1 DATE+ Send/Receive Data (+) In/Output
2 DATE- Send/Receive Data (-) In/Output
3 NC No Connection -
4 NC No Connection -
5 GND Ground -
6 NC No Connection -
7 NC No Connection -
8 NC No Connection -
9 NC No Connection -
FG FG Frame Ground -
• Be sure to connect pin number 5 (SG) of COM1 to the host unit's
Signal Ground terminal.
• 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-A switches, be sure to first turn the
PS-A's power supply OFF. Failure to do so can cause a PS-A
malfunction.
• Connect the FG terminal line to the connector cover's PS-A con-
nector attachment screw.
• FG and SG terminals are internally connected in the PS-A. When
connecting to another device, be sure to create an SG shorting
loop in your system.
Use inch type (#4-40UNC) threads to hold the cable's set (attachment) screws
in place.
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