An
FM approved central office fire alarm control system that provides
power, supervision, and control for 100 Ma Municipal telegraph boxes.
A box card supplies supervisory and control logic for repeating alarms
to bell or recording circuits. An alarm card powers and supervises
box circuits. Energy efficient, with switching power supply. Type
A, B, or A/B programmable. LED meter displays current, voltage, and
leakage readings. A common card provides the supervision and ground
return control. Up to ten cards per rack, expanded by adding additional
card cages. Cards and racks sold separately, requires an extender
card to set up.
