AMX Enhanced Master RS-232 Controller AXB-EM232 - Manual (Page 7)

Product Information
3 AXB-EM232 Enhanced Master RS-232 Controller
Installation
Setting the internal jumpers
Some RS-232 devices require that the bus be terminated at 100 ohms. Follow these steps if your
device requires this termination.
1. Discharge the static electricity from your body.
2. Unplug the two-pin power connector.
3. Remove the two screws on the front panel.
4. Remove the front panel, and slide the circuit board out of the enclosure.
5. Remove the jumper on pin trio E1 from pins 2-3 and place it on pins 1-2 (FIG. 2).
6. Replace the board in the enclosure. Then, replace the front panel, refasten the two screws, and
plug in the two-wire power connector.
Setting DIP switches
Configure the device and programming communication ports' baud rate, data bits, stop bits, and
parity. Use the eight-position DIP switches on the front panel to set the communications
parameters.
! RS-232 PROGRAM DIP switch - Use the eight-position RS-232 Program DIP switch to
set the communications parameters for the PROGRAM port.
! RS-232/422 DIP switches - Use the two eight-position RS232/422 DIP switches to set
communications parameters for controlling the RS-232, RS-422, or RS-485 devices.
!
·Set Switch 1 to configure the parameters for Port 1 (RS-232/422/485).
!
Set Switch 2 to configure the parameters for Port 2 (RS-232 only).
FIG. 2 Communication jumpers
E1
100
1 2
3
1 2
3
1 2
3 HI Z