User`s guide

6 Installing the Input Expander
positive DC wire to FIELDVCD as shown. The two jumper clips should be
placed on pins 2 & 3 of JP3 and JP4 to be in field power mode.
Connecting To Your Unit
Attention! Never connect or remove any cabling while power is applied.
On more time for good measure let us mention this:
Your playback unit must be set VOLTAGE MODE before
connecting the Input Expander to it.
Your unit will not understand
what you are trying to do and may display aberrant behavior, if it is in contact
closure mode. You could possibly damage the unit by running contact
closure mode while applying voltages to the inputs! Most units have a DIP
switch or slide switch for this setting. Just put it in the correct position (see your
unit’s manual) and that’s all there is to it.
Verify the unit is not on
and that the external DC
supply is unplugged (if
you are using one). The
cabling necessary to
connect is a 37pin cable
from the Input Expander’s female 37pin DSUB connector to the Discrete
Controls connector (typically female 37pin DSUB also) on the back of your
unit. Tighten the screws of your cabling (if you have any) to the jackscrews on
the connector to secure the cable to the Input Expander. Do this for the unit as
well, and that’s all you need to do! Power up the playback unit and plug in the
DC source (if you are using one).