External interfaces – Proface APL3000B - Node Box PC User Manual
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External Interfaces
• This PS-B 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.
Serial Interface (COM1, COM2)
COM1
COM2
COM2 can be changed to either RS-232C,
RS-422 or RS-485. (The factory setting is
RS-232C.)
To change this setting, set Serial
Mode Select switch on the circuit board to the
desired position.
Please refer to "Switches" for details.
Interfit Bracket
#4-40 (UNC)
Pin
#
RS-232C
Signal Name
Meaning
1
CD
Carrier Detect
2
RD (RXD)
Receive Data
3
SD (TXD)
Send Data
4
ER (DTR)
Data Terminal Ready
5
GND
Signal Ground
6
DR (DSR)
Data Set Ready
7
RS (RTS)
Request to Send
8
CS (CTS)
Clear to Send
9
CI (RI)
Called status display
FG FG
Frame Ground
(Common with SG)
Pin
#
RS-232C
Signal Name
Meaning
1
CD
Carrier Detect
2
RD (RXD)
Receive Data
3
SD (TXD)
Send Data
4
ER (DTR)
Data Terminal Ready
5
GND
Signal Ground
6
DR (DSR)
Data Set Ready
7
RS (RTS)
Request to Send
8
CS (CTS)
Clear to Send
9
CI (RI)/
+5V
*1
Called status display/
+5V Output
(Switching available)
FG FG
Frame Ground
(Common with SG)
*1 To change the RI/+5V setting of #9 pin set
System Set switch to the desired position.
Pin
#
RS-422
Signal Name
Meaning
1
RDA
Receive Data A (+)
2
RDB
Receive Data B (-)
3
SDA
Send Data A (+)
4
NC
No Connection
5
GND
Signal Ground
6
NC
No Connection
7
SDB
Send Data B (-)
8
NC
No Connection
9
NC
No Connection
FG FG
Frame Ground
(Common with SG)
Pin
#
RS-485
Signal Name
Meaning
1
DATA +
Send/Receive
Data(+)
2
DATA -
Send/Receive Data(-)
3
NC
No Connection
Pin
#
RS-232C
Signal Name
Meaning