ABB AC500-eCo Series Hardware Introduction page 29

Risk reduction instructions
Protect the devices from dampness, dirt and damage during transport, storage and
operation!
Do not operate devices outside of the specified, technical data!
Trouble-free functioning cannot be guaranteed outside of the specified data.
Operate the control system only in an enclosed housing (switch cabinet)!
Due to their construction (degree of protection IP 20 according to EN 60529) and their connection
technology, the devices are suitable only for operation in enclosed housings (switch cabinets).
Earth the devices!
The earthing (switch cabinet earthing, PE) is supplied both by the mains connection (or 24 V
supply voltage) and via DIN rail.
The DIN rail must be connected to the earth before the device is subjected to any power. The
earthing may be removed only if it is certain that no more power is being supplied to the control
system.
In the description for the devices (operating manual or AC500 system description), reference is
made at several points to earthing, electrical isolation and EMC measures. One of the EMC
measures consists of discharging interference voltages into the earthing via Y-type capacitors.
Capacitor discharge currents must basically be able to flow off to the earthing (in this respect, see
also VBG 4 and the relevant VDE regulations).
In the description, special attention must be paid to designs using electrical isolation, earthing
and EMC measures for the reasons stated. For more information see Target System ->
AC500/S500-FBP -> Hardware AC500 -> System data -> General considerations for
EMC-conforming assembly and construction.
The earthing concepts of these busses apply to the connection to external bus systems.
Connection of the supply voltage
The supply voltage (or mains connection) terminal block must only be plugged in or withdrawn
with the power off!
The same applies to the terminal blocks of input or output channels (e.g. relay outputs) if they are
operated with dangerous contact voltages.
Do not open live devices!
The devices work with voltages with which contact must be avoided under all circumstances.
Therefore they must not be opened when live. The same applies to the networking interfaces.
Lifting up the cover of the battery compartment to exchange the battery module is not construed
as opening in this context.
Do not obstruct the ventilation for cooling!
The ventilation slots on the upper and lower side of the devices must not be covered by wiring,
cable ducts and things like that.
Run signal and power wiring separately!
Signal and supply lines (power cables) must be laid out so that no malfunctions due to capacitive
and inductive interference can occur (EMC).
Precautions against wiring short-circuits and breakages
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AC500-eCo
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Hardware Introduction