Cabling; Conductor Data For Connection To Power Supply - Bosch APC-AMC2-4W Installation Manual

AMC2 4W
5.4

Cabling

CAUTION!
The cables used in the AMC2 4W access control system are not
!
prone to electrical interference. However, you should avoid
routing cables close to heavy load switching cables and equip-
ment. If this is unavoidable, cross the cable at right angles every
1 to 2 m (3 to 6 ft) to reduce interference.
Grounding and Shielding
The main grounding point at the AMC2 4W will be connected
with pin 2 of the power supply connector - see Figure 7.6.
It is good practice to shield all wires carrying low level signals.
The AMC2 4W enables you to set up a central ground or shield-
ing point, simply by setting a couple of jumpers. Set these
jumpers only if ground or shield is not connected otherwise.
WARNING!
!
Risk of damaging equipment!
When using multiple AMC2 4W devices, set the ground main
jumper only once to assure a central point star connection.
5.4.1

Conductor data for connection to power supply

For short distances below 25m (75 feet) use AWG18 conduc-
tors. For higher distances install an additional power supply
close to the AMC.
Please, calculate the voltage drop by checking the conductor
specifications for characteristic resistance values. The voltage
drop shall not exceed 2V.
Example:
Length = 100m/328 ft
Bosch Security Systems Installation manual
Installing | en 25
F.01U.024.965 | V.4 | 2006.09