2N Lift8 Краткое руководство - Страница 8
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Electrical Installation
Caution
Local power is not supported. Do not connect any local power supply.
The main bus power is sufficient for the I/O Module.
Main Bus Connection
Take the 6-pin main bus connector from the package and connect 6 wires from the CU
maintaining polarity (power + -, audio + -, data + - ) – see the I/O Module cover. Connect
the devices serially (in line). Parallel connection is not allowed.
1.
+
Main bus power
2.
-
Main bus power
Warning
Maintain the connection polarity to make the 2N® Lift8 system work correctly.
Safety
The bus is electrically isolated from the telephone line circuits according to the
EN60950 requirements and its low voltage cannot cause any electrical
accident.
Termination Resistance
Caution
Find the 3-pin termination resistance connecting
jumper between the main bus connector and lift
number switch.
Connect the jumper to the first and last device (CU,
splitter or I/O module) on the bus. Refer to the CU
section for more details.
By default, the termination resistance jumper is off.
3.
+
Main bus audio
4.
-
Main bus audio
5.
+
Main bus data
6.
-
Main bus data