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4 Installation
4.1 Installation
The chassis-type controller is to be installed in a vertical position, with the
terminals at the bottom, to ensure sufficient cooling and air circulation. The
ambient temperature mut not exceed +45°C.
Unwanted voltages fed back from the controllers to the supply mains are
reduced by the connection of mains chokes and RFI filters. The components
allocated to type 53x are listed in chapter 3 "Accessories".
4.2 Connection
•
The controllers contain electrostatically sensitive components. Prior to
assembly and servicing the personnel must be free of electrostatic charges.
Discharging is possible by touching the PE fixing scew or another grounded
metal part in the control cabinet.
• If you use residual current devices:
− The controllers have an internal mains rectifier. After a short-circuit to
frame a DC fault current may prevent the tripping of the residual current
device. Therefore, take additional measures like zeroing or use universal
current e.l.c.b.
− Observe for the dimensioning of the release current of e.l.c.b. that
capacitive compensating currents of the cable screens and RFI filters
occuring during normal operation may cause false tripping.
− Note for the use of universal e.l.c.b.:
The preliminary standard prEN50178 (in the past VDE0160) about the use
of universal e.l.c.b. has been decided by the German committee K226.
The final decision about the use in compliance with the standard is made
by the CENELEC/CS (European Committee for Electrotechnical
Standardization) in Brussels. Further information on the use of universal
current e.l.c.b. can be obtained from the supplier.
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