AMX Enhanced Master RS-232 Controller AXB-EM232 - Manual (Page 9)

Product Information
5 AXB-EM232 Enhanced Master RS-232 Controller
Using Ports 1 and 2 for RS-232 data communication
1. Connect the RS-232 wiring to Port 1, as shown in FIG. 4.
2. Connect the RS-232 wiring to Port 2, as shown in FIG. 5.
3. Configure the AXB-EM232 for hardware handshaking (request to send, clear to send) by
connecting the RS-232 wiring to Port 2, as shown in FIG. 6.
FIG. 4 RS-232 Port 1 wiring
FIG. 5 RS-232 Port 2 wiring
FIG. 6 RS-232 Port 2 wiring for hardware handshaking
GND
RX1
TX1
485EN
RX1-
RX1+
TX1-
TX1+
GND
TX
RX
Device
not used
RS232/422
Port 1
GND
RX2
TX2
CTS2
RTS2
GND
TX
RX
Device
not used
RS232
Port 2
GND
RX2
TX2
CTS2
RTS2
GND
TX
RX
Device RS232
Port 2
RTS
CTS