ABB XIO-08 - Page 29

XIO USER MANUAL | 2106424MNAA | 29
Figure 3-2: COM 1 to COM 8 serial communication port pinouts
Legend: COM 1 to COM 8 serial communication port pinouts
PIN
RS-232
RS-485
RS-422
1
Voltage out (VOUT)
Voltage out (VOUT)
Voltage out (VOUT)
2
Ground (GND)
Ground (GND)
Ground (GND)
3
Switched voltage (SW VOUT)
Switched voltage (SW VOUT)
Switched voltage (SW VOUT)
4
Ground (GND)
Ground (GND)
Ground (GND)
5
Request to send (RTS)
Transmit/Receive (BUS+)
Transmit Bus + (TBUS+)
6
Transmit data (TX)
Transmit/Receive (BUS-)
Transmit bus – (TBUS-)
7
Request to send (RX)
Not Used
Receive bus + (RBUS+)
8
Clear to send (CTS)
Not Used
Receive bus – (RBUS-)
To wire the serial communication port:
IMPORTANT NOTE
: XIO user drawings provide COM wiring details for specific external devices. See
the
Additional information section.
NOTICE
– Equipment damage. Pin 1 (VOUT) or pin 3 (SW VOUT) can power an external device on
all COM ports. The external power supply connected to the
power port determines the output voltage
at these pins.
Verify that the device is compatible with the input voltage at the
power port before connecting to
these pins. Connection to an incompatible device can result in damage to the device.
• Use pin 1 (VOUT) and pin 2 (GND) to provide constant voltage.
• Use pin 3 (SW VOUT) and pin 2 (GND) to provide switched voltage.