Simons Voss Technologies SmartRelais 3 Advanced Manual page 69

SimonsVoss
Manual
SmartRelais 3 Advanced
ATTENTION
DANGER
Malfunctions due to voltage drop
The physically induced voltage drop in the trailing cable may cause low
voltages in power supplies which come from outside the cab.
1. Take the cable length into account.
2. Switch to a version with power supply in the cab if necessary (see
Common earth with power supply [} 69] and Common earth with
SREL3 components [} 70]).
3. Make the cable gauge larger by merging lines in the trailing cable.
Also see
2 Common earth with power supply [} 69]
2 Common earth with SREL3 components [} 70]
Common earth with power supply
This wiring layout presupposes that the cab already has a power supply
line connected to the outside world. In the cab, a voltage converter
transforms the voltage and provides the power to the reader and
SmartOutput modules. The power supply's earth is also used for the lift
electronics as a common reference potential for data transmission between
the reader, controller and SmartOutput module.
Electric shock due to mains voltage
An electric shock may be caused when connecting the non-hazardous
earth (low voltage) to a conductor which carries the mains voltage.
1. Only use conductors with a low-voltage potential (< 42 V) as a common
earth cable!
2. Protect live cables, so people do not touch them accidentally!
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