Comelit MT 4478A TAS User Manual
Page 11
11
Note:
•
These connections are typical of two or more System Keyboards.
(max. 32)
•
The RS-485 data cable length could be few kilometres at
9600 bps. (depends on the cable characteristics)
SECTION 3
TECHNICAL SPECIFICATIONS
3.1 APPEARANCE
3.2 SPECIFICATIONS
Number of Keys
25 (foil)
Number of LEDs
6
Control Input/Output
RS-485 (D-9M)
Keyboard address
1-16, Internal DIP-Switch
Termination
120 ohm, Internal Jumper
Power requirement
12 V DC
Consumption
max. 300 mA DC
Dimensions (W x H x D)
125 x 150 x 34 mm
Weight
0.5 kg
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