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Door station/power supply units
22
Video power supply unit 1 4874
Device description
The Video power supply unit 1 4874 is used as the main power supply for up to 12 indoor video stations or handsfree
intercom units. No manual power on rights may be set and no parallel operation planned.
Connection
Refer to connection diagram on page
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13
TwinBus video line distributor 1 4813
Device description
Video line distributor 1 4813 extends a TwinBus video line to 3 video lines, and similarly to the TwinBus main lines
that power supply unit 1 7573 provides. The device is operated as an additional device with a TwinBus power supply
unit 1 7573.
Connection
Refer to connection diagram on page
☞
13
Starting up
Set the signal source using b and E+:
No bridge:
Input signal via TwinBus video line (3) (factory setting).
With bridge:
Input signal via coaxial line (1). DIP switch (2) can be used to adapt the signal of the coaxial input.
Connections
1. Coaxial input
2. Switch for selecting the input signal
3. Bus input
4. 3 video bus outputs
5. System bus (connection to a power supply unit)
1
2
4
3
5
00246-0
