Installation and Wiring
7
AXB-232++ - Instruction Manual
Installation and Wiring
Overview
The AXB-232++ can be used as an independent RS-232/422/485-controlled interface by setting the internal jumpers. Configure
the communication parameters using the DIP switches on the front panel.
Setting the Internal Jumpers
Setting Jumper JP4 To Terminate RS-422 Input With 100 ohms
Terminating a device involves installing a 100 ohm line terminator, this is typically used to achieve better communication and signal
integrity. You will want to terminate when the communication is at a high data rate or over a long distance. Termination can be
harmful because it increases the current in the line, and more radiation that could interfere with signals.
Jumper JP4 places 100 Ohms termination across RS422 receive data pins 5 & 6:
1.
Disconnect the RS-232/422/485 connectors.
2.
Unscrew the two screws on the rear panel, and remove the panel.
3.
Slide the circuit board out of the enclosure.
4.
Locate the JP4 jumper (FIG. 2).
5.
Install the jumper in the 'ON' position (default setting = OFF).
6.
Slide the circuit board back into the enclosure.
7.
Replace the panel, and refasten the screws.
8.
Reconnect the RS-232/422/485 connectors.
Setting Jumper JP5 To Set the RS-422 Port For RS-485 Use
1.
Disconnect the RS-232/422/485 connectors.
2.
Unscrew the two screws on the rear panel, and remove the panel.
3.
Slide the circuit board out of the enclosure.
4.
Locate the JP5 jumper (see FIG. 2 on page 7).
5.
Set jumper JP5 to the ON position (the default setting is OFF).
6.
Slide the circuit board back into the enclosure.
7.
Replace the panel, and refasten the screws.
8.
Reconnect the RS-232/422/485 connectors.
FIG. 2
Location of internal jumpers
CORP.
AXB-232++
1998
JP4
JP5
Internal jumper JP4
Internal jumper JP5
front
