Technical data
    Chapter 3: Overview  
SP40S Multi-Function Facility Communication System Manual, Revision L 
3 
Feature 
Description 
Alarm Audio Processing Section 
  Three Priority ordered audio inputs 
Hand-held, push-to-talk (PTT) microphone, and Priority 1. For live, 
emergency voice announcements and instructions. The microphone 
overrides (mutes) any voice message or tones in progress. 
  Auxiliary Input (AUX IN, CC/NAC), Priority 2. 
o  CC or NAC initiates AUX IN audio 
o  CC is supervised. NAC is not supervised. 
o  For use with SAFEPATH – Remote Microphone Expander 
(SP4-RMX) or SAFEPATH – Remote Microphone (SPRM) 
  Digital Voice Section inputs (IN1, IN2, IN3, IN4, IN5, IN6, IN7, 
IN8). 
o  IN1, IN2, IN3, IN4, IN5, IN6, IN7, IN8 have priorities 3, 4, 5, 
6, 7, 8, 9, and 10 respectively. 
o  IN1 – IN8 are initiated via Contact Closure. 
o  IN1, IN2, IN3, IN4, IN5, IN6, IN7, IN8 are supervised for an 
OPEN. 
o  Messages can also be initiated via user interface. 
Non-Alarm Audio Processing 
Section 
  Night Ring (NR), Priority 6. 
o  Contact closure activated. 
o  Non-alarm. 
o  Does not operate if on Battery. 
  Telephone Page (TEL), Priority 7. 
o  Accepts a Telephone Page Port Input. 
o  Will not operate if the panel is on Battery. 
  Background Music (BGM), Priority 8. 
o  Line Level Input. 
o  Will mute when any other input is used. 
o  Will not operate if the panel is on Battery. 
Ground Fault Detection Section 
Monitors inputs and outputs for 40K Ohms minimum in relation to 
ground. 
A Dual-Tone Tone Generator with 
two field selectable sounds (Code 
3 Tone, Slow Whoop) that sound 
when there is a Digital Voice 
Section Failure in alarm condition. 
Provides Code 3 tone or Slow Whoop (user selectable) in the instance 
of a Digital Voice failure or system timeout. 
Full supervision with on-board 
diagnostics and trouble reporting 
circuits for: 
Audio NAC circuit wiring -- open and short conditions during standby 
AND active (Alarm and BGM) Ground Fault detection 
Strobe NAC circuit wiring -- open and short conditions 
PTT Microphone -- not installed or damaged 
Amplifier -- operation 
Digital Voice Section 
Input voltage/low battery 
Tone generator operation 










