Technical data

Chapter 5: Operation
WARNING: Do not leave the SP40S panel in a trouble condition,
as it may not play warning messages, which could result in serious
injury or death to you and/or others. If the panel indicates a trouble
condition: (1) provide UL required alternative signaling and (2) have
qualified service persons immediately replace unit(s) that have
malfunctioned.
WARNING: Messages requested before and during a trouble
condition may not be heard, which could result in serious injury or
death to you and/or others. If messages requested before and during
a trouble condition are still necessary, repeat them when the SP40S
panel is returned to normal.
5.3.1 Visual Notification Appliance Output Circuit Supervision
The Visual Notification Appliance Output Circuit uses Class B, Style Y wiring, and is supervised
for open and short circuits when the output is de-energized. Output circuit supervision requires
installation of UL Listed 10K Ohm, ½ W EOLR on the output circuit. A sensed strobe short
circuit trouble illuminates D96 STB SHORT LED. A sensed strobe open circuit trouble
illuminates D97 STB OPEN LED. See Figure 8-1 for LED location.
5.3.2 Audio Notification Appliance Output Circuit Supervision
The Audio Notification Appliance Output Circuit uses Class B, Style Y wiring, and is supervised
for open and short circuits when the output is de-energized. Output circuit supervision requires
installation of UL Listed 10K Ohm, ½ W EOLR on the output circuit. A sensed open circuit
trouble illuminates D1 AUDIO OPEN LED. A sensed strobe short circuit trouble illuminates D2
AUDIO SHORT LED. See Figure 8-1 for LED location.
5.3.3 Amplifier Supervision
An inaudible supervisory tone plays through the Amplifier section during standby for supervision
purpose. Any sensed trouble illuminates D5 “AMP” LED steadily. See Figure 8-1 for LED
location.
5.3.4 Ground Fault Supervision
The SP40S Multi-Function Facility Communication System supervises for Ground Fault
conditions on Class B, Style Y field wiring that is not electrically isolated. The supervised wiring
includes contact inputs, visual NAC circuits, audio NAC circuits, amplified speaker NAC
circuits, and trouble audible output circuits. All other wiring is electrically isolated. If a Ground
Fault condition exists, D67 GF LED illuminates. See Figure 8-1 for LED locations.
SP40S Multi-Function Facility Communication System Manual, Revision D
2