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Keltron's PET604 and PET608 are two of a series of distributed-multiplex, addressable transceivers that provide a low cost and reliable method of protecting a wide range of proprietary, commercial, and industrial buildings and complexes.

The PET604/608 provide ultimate flexibility for campus or multiple building facilities as they contain both input-monitoring circuitry and full fiber optic communication capability. A system combining multiple PET modules can provide monitoring for up to 2048 contact points across long distances.


Flexibility - compatible with any FACP or device with relay outputs

Scalability - system of multiple PET modules can monitor thousands of contact points

Reliability - fiber optics are lightning proof and provide long term protection from wear and weather

High Performance - high-performance error-detection during serial, multiplexed signal transmission


Compact and easy to install

Distributed-multiplex operation includes individually addressable inputs

Contains two independent fiber optic ports

Includes two independent ports for NFPA 72 signaling line circuit classes A or B to style 7

Contains 4 or 8 inputs per module - EOL resistor-supervised

Unique 3-resistor monitoring enables monitoring of up to five conditions per input

Fiber optic signaling provides isolation and high noise rejection

Wide range low power input - 10.8-25V at 90mA

Runs from FACP power with no compromise of ground fault detection

Runs from FACP power while maintaining isolation between separate FACPs on the fiber backbone

Enclosure may include optional tamper switch whose condition is reported to the host

PET604/608 Specifications >

Download data sheet >

Operates in conjunction with UL-listed Keltron DMP703-704 systems which can monitor over 500 PETs

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