Table of Contents
4
Installation
4.1
General installation notes
Always follow the safety instructions during installation.
Route all signal cables separately for activation of digital inputs and contact monitoring
purposes.
In all cases separate 230 Vac voltages from low voltage lines, if these voltages are
being used in conjunction with this application.
Where possible, cable lengths for digital inputs and outputs should not exceed 30 m.
Where cable runs exceed 30 m, take appropriate action to exclude the possibility of
faults resulting from un-authorized overvoltage levels. Such action may include
avoidance of lightning conductors on external wiring, overvoltage ('spike') protection in
internal areas, protected cable routing, i.e. shielding.
The 24V psu and the encoder psu cables should be shorter than 30m, and should not
leave the building and should not be connected to a distributed power network.
Measures relating to electromagnetic compatibility (EMC).
The SI-Safety module is intended for use in a drive unit environment and complies with
the aforementioned EMC requirements.
Another prerequisite is that the electromagnetic susceptibility of the entire system must
be assured by an appropriate range of similar measures.
Safety instructions
WARNING
•
The 0V (L- negative pole) must be connected to ground (earth). Failure to observe
this could cause a risk of electric shock in the event of an internal fault in the drive.
•
Ensure that line power supply cables and 'switching lines' on the inverter are routed
separately.
•
Signal wires and power lines from the inverter must be routed in separate cable
ducts. The ducts themselves should be spaced at least 10 mm apart.
•
Always use shielded cabling when connecting position/speed sensors. The cable
used to transmit signals must be compatible with the RS-485 standard (twisted pair
wiring).
•
Ensure that the shielding is connected correctly in the HDMI connector for position
and speed sensors. Only metal or metal coated connectors are approved for this
purpose.
•
Shielding on the sensor side must employ appropriate recognized standards.
•
Ensure that all the inverter technology installed in the vicinity of the module is EMC
compliant. Pay careful attention to the cable routing and the processing of shielding
for the motor wire and connection of the brake resistor. Always ensure compliance
with the installation guidelines of the inverter manufacturer.
•
All contactors near the inverter must be provided with appropriate protective
circuitry.
•
Adopt appropriate measures to protect the unit from overvoltage.
34
SI-Safety Installation & Operating Manual
Issue Number: 1
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