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Video Recorder 670 Series Hardware setup | en 23
Bosch Security Systems Installation and Operation manual AM18-Q0617 | v2.0 | 2012.03
4.4 Keyboard connections
The keyboard input and output connectors are used to connect a Bosch Intuikey keyboard to
one or more DVR 600 Series units.
For one unit, connect the keyboard to the Keyboard in connector. For more units, connect a
cable between the Keyboard out connector of the first unit and the Keyboard in connector of
the following DVR 600 Series unit. Up to 16 DVR 600 Series units can be connected and
controlled in this way with one keyboard.
For short distances (up to 30 m), standard 6-core telecom flat cable can be used to supply
power and signal connections for the keyboard (LTC 8558/00). For distances over 30 m
between the keyboard and the DVR, the Keyboard Extension Kit (LTC 8557) must be used.
This kit provides junction boxes, cables, and the appropriate power supply for the external
keyboard. The recommended cable type is Belden 8760 or equivalent.
Termination
Connect the keyboard terminator (supplied with the Intuikey keyboard) to the Keyboard out
connector of the last DVR in the circuit. If multiple DVR 600 Series units are controlled with a
single keyboard, the Keyboard out connector of the last DVR 600 Series unit must be
terminated.
Specifications
Communicaton protocol: RS485
Maximum signal voltage: ± 12 V
Power supply: 11 - 12.6 VDC, maximum 400 mA
Maximum cable length: 30 m (using standard 6-core telecom flat cable), or 1.5 km (using
Belden 8760 or equivalent in combination with the LTC 8557).
Cable type: black (cross-over) cable (supplied with keyboard)
Termination: 390 Ohm terminator
Connector: RJ11 (6-pin)
Figure 4.5 Keyboard input and output connectors
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