A balanced XLR microphone combiner/splitter used in professional audio setups.
Technical documentation for instrumentation boards by Spectrum Instrumentation . MC-31 - IMG STAGELINE shema mc 31 1
The most common technical reference for "MC 31" is the . This device is widely used in power substations for feeder protection. shema mc 31 1
An alarm system component used to detect the state of doors or windows (open/closed). shema mc 31 1