AMX Enhanced Master RS-232 Controller AXB-EM232 - Manual (Page 10)

Product Information
6 AXB-EM232 Enhanced Master RS-232 Controller
Using Port 1 for RS-422 communication
Wire the AXB-EM232 for communicating via RS-422 by connecting the RS-422 wiring to Port 1,
as shown in FIG. 7. RS-422 communication is available only through Port 1.
Using Port 1 for RS-485 data communication
To wire the AXB-EM232 for communicating via RS-485, connect the RS-485 wiring to Port 1, as
shown in FIG. 8. RS-485 communication is available only through Port 1. You must ground the
485EN pin.
Using the 12 VDC power supply
Connect the optional 12 VDC power supply to the two-wire power connector to apply power, as
shown in FIG. 9.
FIG. 7 RS-422 Port 1 wiring
FIG. 8 RS-485 Port 1 wiring
FIG. 9 12 VDC Power connector wiring
GND
RX1
TX1
485EN
RX1-
RX1+
TX1-
TX1+
TX-
RX-
Device
RS232/422
Port 1
TX+
RX+
GND
RX1
TX1
485EN
RX1-
RX1+
TX1-
TX1+
RS232/422
Port 1
GND
-
+
Device
PWR
+12 VDC
GND
Power supply
+
-