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  Alpha Communications AY-4851 Main Control with Battery Back-Up
Alpha Communications AY-4851 Main Control with Battery Back-Up


Our Price : $4,477.56

Product Code: AY-4851


Description Specifications
The Cat. 4850/4851 Main Control provides microprocessor signal control electronics, audio amplifiers, line power supply, and backup battery power supply (4851 only) for Pro-Alert 480 Intercom Systems. The main control is capable of accepting combinations of 4875/4876 Masters, and 4865 DirectSelect Masters without modifications or additional equipment.

The main control provides power, voice amplification, signal tones, and multiplex control logic for master stations and remote stations. In a non-networked system, the main control provides connections for up to two 4865 master stations or up to eight 4875/76 Master Consoles. A single non-networked main control supports up to 128 remote call stations without the need for additional control or audio expansion equipment. A fully networked system can support up to four 4865 masters or 16 Cat. 4875/76 Master Consoles as well as a maximum of 512 remote call stations.

The main control may be interfaced to a computer or to a radio page system via the Cat. 4861 Computer/Radio Page Interface. The main control continuously tests the system for master and room station response; diagnostic messages are reported to master stations.

The self-charging battery backup (4851 only) maintains full system function during line power outages. Non-volatile program memory eliminates the need to reprogram the system if power is disconnected. System configuration is programmed at the installation to meet facility requirements and can be changed at any time by using a PC and the 4890 Administration Software. No wiring changes are required.

Central system equipment consists of a main control mounted in a central equipment enclosure. RJ-45 connections for remote stations and 4875/76 Master Consoles allow for simpler wiring at the main control and to stations throughout the system using Cat-5 cable.
  • Cat-5 cable connectivity
  • Multiplex/microprocessor design
  • Continuous self-diagnostic test
  • Backup battery included on Cat. 4851

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