PIM-120 Protectowire
Single Zone
Mini-Interface Module
An ISO 9001 Registered Company
Features
•
Monitors up to 2,000m (6,560 ft.) of Protectowire
Linear Heat Detector.
•
Individual alarm, trouble, and power on LED’s.
•
Versatile track mounting.
•
Easily mounts in standard electrical boxes.
General
The PIM-120 is a single zone detection module that interfaces between a main control panel detection circuit or addressable
node and Protectowire Linear Heat Detector. The module provides a Class B (Style B) initiation circuit capable of operating up
to 2,000 m (6,560 ft.) of Protectowire as well as other types of normally open non-resistive contact devices.
Description
The PIM-120 Protectowire Interface Module is designed for easy mounting using a convenient “snap-lock” mounting track
that enables the module to be installed inside a host control panel or in any enclosure meeting the application requirements.
In order to ensure proper operation, each PIM-120 Interface Module requires regulated 24 VDC external power which is nor-
mally provided by the host control panel. A Green “Power On” LED indicator is provided on each PIM-120 to provide a visual
confirmation that the module is powered. One set of Form C alarm contacts and one set of Form C trouble contacts are pro-
vided on each module and are used to connect the unit to a corresponding detection zone in the host fire alarm panel. The
module’s alarm circuit is non-latching and self restores upon clearing the initiating circuit alarm state. The host panel’s zone
detection circuit is used to retain the system’s alarm latch (memory) until manually reset.
Each PIM-120 Interface Module can be configured with a shunt diode barrier to provide an intrinsically safe Class B detection
circuit for those areas that are classified as hazardous. In this configuration the maximum length of Protectowire that can be
connected to the circuit is 1,829m (6,000 ft.), however additional limitations may apply depending upon the specific require-
ments of the hazardous application. The shunt diode barrier limits the voltage and current in the detection circuit to values that
are incapable of causing an explosion in areas that are classified as Class I, II, or III, Division 1, Groups A, B, C, D, E, F, & G.
Only Protectowire Linear Heat Detector and/or a non-energy storing contact initiating device may be used on PIM-120 intrin-
sically safe detection circuits. The intrinsic safety barrier compatible for use with the PIM-120 is part number 9001/01-280-
100-101 as manufactured by R. Stahl Inc. Consult the Factory for specific information on hazardous location installations.
Technical Data and Installation Guide
