Switching module for intercom networks

Switching module for intercom networks, for use in video door entry systems with 6680 power supply unit (and audio door entry systems with power supply units 0931, 931A and 0931/0CT), can be used to create independent groups of intercommunicating monitors and interphones, has a differentiated call generator, connection of several 935A devices requires one 0832/030 transformer for each switching module, installation on DIN rail (60715 TH35), occupies 4 modules size 17.5 mm