Replaceable device for an electronic monitoring system, especially a video monitoring system

An electronic video monitoring system comprising

• a plurality of video cameras connected with a monitoring device via video lines,
• said monitoring device having at least one external connection field,
• said external connection field having a plurality of external individual connections each for connecting one camera with the device,
• said external connection field being provided for on a flat plate-shaped segment housing,
• the segment housing being removable fasted in a recess of a casing of the monitoring device and thereby forms part of the outer surface of said casing,
• internal multiple contacts being provided for on the segment housing,
• the internal multiple contacts being disconnectably connected to at least one multiple connection on the casing of the monitoring device,
• said external individual connections being electrically connected with the internal multiple contacts on the segment housing,
• said recess being closed at its bottom by a bottom wall inside of the casing,
• said at least one multiple connection being provided on said bottom wall inside the recess, and
• said internal multiple contacts on the segment housing and said at least one multiple connection on the bottom wall inside the recess being multiple plugs and multiple sockets connections,
• the segment housing being provided for with brackets extending beyond a first narrow side of the segment housing which side is opposite to second narrow side of the segment housing,
• said internal multiple contacts on the segment housing being provided for near the second narrow side of the segment housing,
• each of said brackets engaging an opening of the device casing when the segment housing is located inside the recess of the device casing, and
• the device casing having a locking and unlocking mechanism with a spring mounted catch on for locking the segment housing in the recess of the casing.