XCU Installation manual supplement -
Cables and connectors
Doc. ID: XCU Installation manual supplement - Safety, cables and connectors v5.docx
Authors: Wouter Hermelink, Peter de Konink
Page 3/5
Recommendations for cables and installation
•
Flexible cables are recommended to connect the camera.
•
For larger distances, or in case of an already installed rigid (tunnel) cable, the use of a junction box is
recommended as interface to the camera. In this case a prefabricated patch-cable with molded
connectors can be used. (MOQ applies)
For tunnel applications a shielded CPR B2ca rated cable is recommended:
•
For example: Jobarco Ecoflex CPR HCH-JZ B2ca (suitable for patch-cable use)
Power cable: maximum length table
Power supply
type
Total cable
resistance
Cable length for copper wire size
1.5mm²
0.75mm²
0.5mm²
24VAC
50/60Hz
< 1.2 Ohm
< 50m
< 25m
< 17m
24VDC
< 2.3 Ohm
< 100m
< 50m
< 33m
100 - 240VAC
50/60Hz
< 300m
< 150m
0.75mm²
minimum
Power cable: length and overvoltage protection
•
The camera 24V power input is compliant with EMC standard EN 50130-4. This standard sets
requirements for surge voltage immunity in clause 13. The 24V power supply lines and signal lines are
tested for line-to-ground surge voltage levels up to 1kV (1.2/50 µs). There is no requirement for line-to-
line surge voltage testing on 24V inputs.
•
The 24V power supply inputs may not be grounded.
•
For cable lengths up to 10m no additional surge protection is recommended. For longer cables,
additional surge protection (SPD type T3 according IEC 61643, or equivalent) is recommended to
ensure that the camera overvoltage category (IEC 60664-1) is reduced to class II.
•
The installer is required to provide additional protection to reduce the overvoltage if the equipment is
subject to transient overvoltages exceeding those for overvoltage category II.
Ethernet cable:
•
Shielded CAT5E S/FTP, wire size AWG24, solid or stranded, cable length up to 100m.
•
For PoE powering of the XCU cameras the Ethernet cable must comply with the IEEE 802.3at
requirements for PoE+ (up to 25,5W power at the camera). This means the maximum cable resistance
per pair set is limited to 12.5 Ohm. The recommended size AWG24 typically meets this requirement for
cable lengths up to 100m.
•
For larger wire diameters the use of a junction box is recommended.