LT Security PTZKB636 - Manual (Page 9)

User Manual of System Keyboard
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3.1.2 Working mode of keyboard system:
This working mode is mainly used in direct-control decoders and intelligent
Hi Speed Domes. To enter this mode, change No. 8 terminal in ID to “ON”.
Baud rate selection setting: the baud rate of the keyboard can be set by
changing terminals 5 and 6 in ID. Baud rate is selected to assure that the
keyboard has the same data transmission rate as the control equipment.
Control protocol: under the same baud rate, decoders and intelligence High
Speed Domes in different control protocols by changing No. 1, 2, 3 and 4 in
ID.
No. 1 2 3 4 Control protocol
1 1 0 0 0 PELCO-D
2 0 1 0 0 PELCO-P
3 1 1 0 0 ALEC
Position of
code position
5 6
Baud rate
Position of
code position
5 6
Baud rate
1 0 1200 1 1 4800
0 1 2400 0 0 9600
User Manual of System Keyboard
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3.2 Schematic drawing of connection between keyboard and matrix
mainframe
The keyboard joint-box is connected to the communication interface with a
plain shielded two-core twisted-pair cable, 1200 meters long at most.
DC 12V power line
：white—DC12V；black —GND.