Clearcom MX-820 Matrix Switch

The MX-840A Assignment Panel allows easy setup and reconfiguration of Clear-Com intercom systems using a simple, graphical assembly of slide switches. It will switch up to 40 stations to 8 channels.

Operation

Each station has a slide switch associated with it. Simply slide the switch up or down to assign the sta- tion to one of eight party-line intercom channels. A transparent, removable front cover is provided so the assignment of each station cannot be inadvertently changed, yet still can be easily viewed. Locations above and to the right of the assignment switches are provided for labeling.

Power Monitoring

In any intercom system, problems can result from shorts caused by damaged cabling. In a large system, these defects can be difficult to locate. The MX-840A provides Power Monitoring LEDs to allow shorts and other power faults to be more easily located. The 8 green On LEDs and 8 red Fault LEDs monitor the power supplied to groups of stations. Stations 1 - 5 are associated with the first LED pair, stations 6 -10 are associated with the second LED pair, and so on. The LEDs will indicate "green" if power isOK, "red" if a station group is shorted or not connected, and "off" if no power is available on any station groups.

NOTE: Do not confuse the 8 LED pairs with the 8 channel connections. The LEDs are only associated with groups of stations, not with the 8 channels.

The MX-840A does not limit or control power -- it only monitors it. The power output capability of each power channel is the same as that of the power supply producing the power. 

Station Connections