ProfiHub B5+ / B5+RD User Manual
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Version 2.0 – July 2014 Page 16 / 56
ProfiHub-B5-Plus-Manual-EN.docx © PROCENTEC 2014 - Copyright - all rights reserved
2.4 Power Supply
To comply with UL certification regulations the power supply must be a Limited Power Source (LPS) or
NEC Class 2 or CEC Class 2 that cannot exceed 100VA.
The two 2-pin screw type power connectors are located on the left of the ProfiHub B5+ (
Fig. 10
).
1 = + (left)
2 = - (right)
Both power connectors are linked 1-on-1 to the internal power supply of the B5+. If one power supply
fails, the other takes over without delay time. When redundancy is not required, it is sufficient to use
one power connector. Please note that when using only one power supply, a voltage of max. 0.25 V
will exist on the other unconnected power connector, as shown in
Fig. 11
.
If only one power supply is used, the alarm contact is closed. If two power sources are connected, the
contact is open. As soon as one of the power supplies fails, the contact will close and the Power
Indicator LED will blink.
For UL certified installations the power supply must comply with the following specifications:
- Limited Power Source (LPS) or NEC Class 2 or CEC Class 2
- Voltage: 12 - 24 VDC
- Current: min 275 mA
- Wire diameter: < 2.5 mm
2
Fig. 10 - Power connecto
s and LEDs
Fig. 11
Maximum voltage on unconnected Power Connecto
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