Features
Isolated Loop Circuit Protector (ILCP) for up to
5 A of DC or audio current:
- Low impedance design minimizes voltage drop
- For internal or external applications (refer to page 2 for external wiring requirements)
- Refer to specific panel field wiring diagrams for additional application information
- Listed as an Isolated Loop Circuit Protector to UL 497B, Protectors for Data Communications and Fire Alarm Circuits
- Listed as a Surge Suppressor to ULC-S527, Control Units for Fire Alarm Systems
- See Note 1 below for additional application reference
- For lower current ILCP applications (up to 200 mA), refer to Model 2081-9027 on data sheet S2081-0007
Operation is compatible with:
- DC notification appliance circuits (NACs)
- Speaker circuit NACs (25 VRMS)
- IDNAC SLCs, IDNAC SLCs, and TrueAlert SLCs
- Other circuit types (see Note 2 below)
Multiple stages of protection for DC and audio circuits:
- Line-to-Line Protection
- Line-to-Earth protection
Rugged epoxy encapsulated package
Description
Electrical transients caused by lightning or by
disturbances on high voltage power lines are conditions that
require low voltage wiring circuits to be adequately
protected. This protection is most effective when placed at
the location where such circuits leave or enter the building.
Transient Protection. The 2081-9028 Isolated Loop
Circuit Protector (ILCP) is designed to protect Simplex®
Fire Alarm circuits from those electrical transients induced
on wire runs that are routed external to the building.
Because of its small package size, it can be easily mounted
at the location that achieves maximum protection.
Note 1: Overvoltage Protector Applications. Model
2081-9028 is for use as an Isolated Loop Circuit Protector
which is different from operation as an Overvoltage
Protector. For Overvoltage Protector applications, refer to
Overvoltage Protector model 2081-9044 which is listed to
UL 864, rated for up to 200 mA, and documented on data
sheet S2081-0016.
Note 2: Operation with other Circuit Types.
Performance of the 2081-9028 ILCP has been quantified
for use with other circuit types for specific applications
where its low resistance is desired. Contact your local
Simplex product supplier for application guidance.
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