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Description
ZCT-8B Zone Card Telephone
The ZCT-8B Zone card supports eight
Class B telephone zones with dial and
busy tone features. Each zone is
supervised for open and short trouble
conditions. Up to five telephones can
be on line at the same time with no
loss of quality.
PLC-4 Power Limiting Module
The PLC-4 and its associated PL864
plug-on boards limit the power of the
MXLV System to comply with UL-864.
There are three different PL864 boards
that can plug onto the four slots of the
PLC-4:
the PL864-25A
the PL864-70A
the PL864-25S
The PL864-25A and the PL864-70A
plug onto the PLC-4 to limit power to
audio circuits. The PL864-25S plugs
onto the PLC-4 to limit power to strobe
circuits.
NOTE: Use the PL-864S for strobe
circuits only. Using the PL-864S for
audio circuits may damage the
system. Use the PL864-70A for
70.7V audio circuits only.
The PLC-4 plugs onto one of the OMM
card edge connectors. A single PLC-4
with four PL864 plug-on boards can
serve up to four audio and/or strobe
circuits.
The PLC-4 and PL864-25A/70A audio
cards do not supervise themselves.
However, since all audio power to the
MXLV System passes through them,
signal losses appear as troubles for the
ASC-1/-2 modules.
ZCT-8B Zone Control Telephone Card Module
PLC-4 Power Limiting Module
PL864-25S Plug-on Board
Technical Manuals Online! - http://www.tech-man.com
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