Fallback switch

  • 06-Feb-2009 09:31 EST
M4124_HR.jpg

Electro Standards Laboratories’ Model 4124 DB9 A/B automatic fallback switch with contact control remote port includes mounting with steel pass-through bolts through the bottom of its desktop enclosure, making it suitable for onboard ship use. The DB9 switch shares a single device connected to the common port and accepts contact closure commands to control switch position, lock out local front-panel push button, and obtain switch status remotely. Automatic fallback mode is based on loss of data on port A, which automatically switches to port B if data is lost. Automatic fallback mode can also be overridden, and the unit can operate as an A/B switch.

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