The D8128D OctoPOPIT module combines the
functions of the D8125 POPEX module and the D8127
and D9127U and D9127T POPIT modules to provide
eight Class B (Style B) off-board points in a single
module. The D8128D OctoPOPIT and D8125 POPEX
modules can be wired in parallel to the ZONEX Bus
terminals on the same panel.