ABB AC500 Safety Instructions page 4

English
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 compact PLC 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!
Earthing (switch cabinet earthing, PE) is supplied both by the mains connection (or 24 V supply voltage) and via the 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 device.
In the documentation for the devices (operating manual or AC500 system desciption), 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 res-
pect, 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 detailed information, please refer to Automation Builder -> PLC Integration -> System Assembly,
Construction and Connection -> Overall Information -> EMC-Conforming Assembly and Construction.
The earthing concept of the respective bus applies for 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The supply voltage (or mains connection) terminal block must only be plugged in or withdrawn with the power off!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 device!
The devices work with voltages with which contact must be avoided under all circumstances. Therefore it must not be opened
when live. The same applies to the networking interface.
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 device must not be covered by wiring, cable ducts and things like that�
4 Safety technical instructions | Information