Bosch Appliances Divar -Digital Versatile Recorder Keyboard connections, Divar connection

Divar Installation Manual Hardware setup

EN 4-4

Keyboard connections

The keyboard input and output connectors are used to connect an external keyboard to the unit. Connect the keyboard to the KBD IN connector. Up to 4 external keyboards can be connected when the optional keyboard port expander (LTC2604) is used.

For short distances (up to 30m), standard 6-core telecom flat cable can be used to supply power and signal connections for the keyboard.

For distances over 30m between keyboard and Divar, the Keyboard Extension Kit (LTC 8557) must be used. This kit provides junction boxes, cables and the appropriate power supply for the external keyboards. The recommended cable type is Belden 9841 or equivalent.

Divar connection

The KBD IN and KBD OUT connectors can also be used to connect several Divar units to each other. The loop-through connector arrangement allows easy interconnection of up to 30 Divars. The connection uses RS485-based communications.

The RS485 connection is not galvanically separated. If you have an installation where Divars are connected via RS485 and they are not located close to each other, you must ensure that they are grounded via the same, clean grounding wire.

Specifications

Communicaton protocol:	RS485
Maximum signal voltage:	± 12V
Power supply:	11 - 12.6V, maximum 400mA
Maximum cable length:	1.5 kilometers
Cable type:	black (cross-over) cable (supplied with keyboard)
Termination:	390 Ohm terminator

Keyboard In - RJ11 socket (KBD IN)

Pin no.	Signal
1	+12 V DC (11V Min to 12.6V Max, 400mA Max)
2	System ground
3	Keyboard plus line
4	Keyboard minus line
5	System ground
6	System ground

Keyboard out - RJ11 socket (KBD OUT)

Pin no. Signal

1No Connection

2System ground

3Keyboard minus line

4Keyboard plus line

5System ground

6No Connection

6 1 4 2

Panel view

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