Features
• Modular TrueAlarm sensor base with built-in electronic alarm
sounder
• Piezoelectric sounder provides high output (88 dBA) with low current
requirements (20 mA)
• For use with interchangeable TrueAlarm photoelectric or heat
sensors (ordered separately)
• Ceiling or wall mounting
Sounder operation
• Powered from 24 VDC or from a compatible Notification Appliance
Circuit (NAC).
• Synchronized through communications or by the NAC, if NAC
powered, see note.
• Sounder can be manually activated from the fire alarm control unit
(FACU).
• Sensor and sounder operation is listed to UL Standard 268.
• Sounder operation is also listed to UL Standard 464 as an audible
notification appliance.
TrueAlarm analog sensing
• Analog sensor information is digitally communicated to the FACU
through IDNet or MAPNET II two-wire communications.
• Sensor information is processed by the FACU to determine sensor
status.

Features
Isolator base for TrueAlarm analog sensors
using IDNet addressable communications:
 Compatible with Simplex® 4007ES, 4008, 4010,
4010ES, 4100ES, or 4100U Series fire alarm control
panel IDNet Signaling Line Circuits (SLCs) providing:
IDNet, IDNet+, IDNet 1+, IDNet 2, or IDNet 2+2 output
loops (see additional information on pages 2 and 3)
 Can be installed up to 250 total allowing isolation
directly to the device level (200 total with 4008)
 Operation is for ceiling or wall mounting
 Base mounted LED indicates sensor status
 Designed for EMI compatibility
 UL listed to Standard 268; ULC listed to Standard S529