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 normally 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 provided 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 requirements 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 intrinsically 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.