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Hardware setup
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, 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.
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
4-4
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
1
No Connection
2
System ground
3
Keyboard minus line
4
Keyboard plus line
5
System ground
6
No Connection
6 1 4 2
Panel view
Philips Communication, Security & Imaging
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