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Keltron originated the concept and use of digitized total message monitoring and offers unique fire alarm control panel (FACP) networking and monitoring systems that are designed to save capital expense and facilitate installation and implementation through compatibility with FACPs from the widest possible range of manufacturers. Our systems feature distributed multiplexing, a method of signaling characterized by the sequential transmission and reception of multiple alarm signals over a single communication channel with means for positively identifying each signal.

The benefits of networking
Minimizing wiring installation, maintenance and related operating costs are benefits of this efficient and cost-effective method of alarm monitoring and networking.

Enables faster event communication through distributed multiplex signaling

Reduces capital expense by interfacing with most FACPs and legacy systems

Increases operator accuracy by providing point-specific annunciation in generic format

How the system works
The Keltron system uses addressable transceivers connected through simple, low cost, daisy chain wiring and communicates via distributed multiplex signaling techniques. The system will accommodate daisy chain and other types of wiring topologies including existing phone lines or abandoned pairs from other systems, reducing capital expense by using the existing infrastructure. The PLM703 provides Keltron's flagship alarm monitoring systems with the ability to monitor intelligent and addressable FACPs from multiple manufacturers. It uses an addressable transceiver that is personality-matched to the monitored FACP and connected to it by an RS232 printer port or other type of serial data port.

A distributed multiplex transceiver, such as Keltron's PET402, accepts the RS232 serial printer port data from the addressable FACP, interprets the data, and transmits sufficient information via the stable, RS485-based communications path, enabling point-specific status annunciation at the head end system.

Features
Keltron PET models that accept end-of-line (EOL) resistor-supervised, dry contact inputs are available in addition to like models that use fiber optics as the transmission medium. Other features include:

Universal FACP compatibility

Full class A style 7 SLC performance

Simplifies wiring using existing phone pairs

Monitors process control, environmental condition, and security related status changes

Standard keyboard data entry is saved for annunciation in response to a received event

Event annunciations occur in generic format, independent of the transmitting FACP

Single touch event acknowledgement insures expedient and accurate responses

Automatic arming and disarming for security points

Facilitates transition to advanced systems

Simple operation reduces the learning curve and operator error

Red/black printer provides a hard copy record of all received events

Monitors a wide variety of signals including fire, fire panel trouble, water flow, sprinkler supervisory, security and industrial process alarms.



UL-listed proprietary supervising station fire alarm system

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