Owner`s manual

171
APPENDIX C
V71 LINE INTERFACE JUMPER SETTING INSTRUCTIONS
The V71 supports EIA-232, EIA-422, and current loop
line interface. Line interface is programmed by
accessing the configuration mode (see Section 11).
From the factory, the DB-25 port and the EIA-232 RJ-45
port are the communication ports when EIA-232 line
interface is selected. The DB-25 port is the
communication port if current loop line interface is
selected. The EIA-422/485 RJ-45 port is the
communication port when EIA-422 line interface is
selected. You can change the DB-25 port to support
EIA-422 line interface by changing a jumper setting on
the V71 board. If you wish to change the jumper
setting to allow the DB-25 port to support EIA-422 line
interface, use the following procedure:
1. IMPORTANT: If the V71 is installed in the M
Series chassis, remove power from the unit by
positioning the on/off switch to the off position
and removing the power cord from the AC outlet.
Unscrew the two straight slot screws securing the
V71 to the back panel and pull the module out.
2. Refer to Appendix D.1 and locate jumper JP4.
The board is marked 232 for EIA-232 line interface
and 422 EIA-422 line interface. JP4 has six pins
and a dual shunt jumper. The center two pins are
common pins. To change the existing jumper
setting to support the desired line interface,
position the dual shunt jumper so that it connects
the two common pins and the two 232 pins or the
two 422 pins.
3. Install the V71 by sliding it along the card edges
along the grooves in the module slot. The V71
has a card-edge connector that fits into a
receptacle inside the M Series chassis. Apply a