Installation and housing
3. Installation and housing
The instrument should be installed in such a way that it is not exposed to moisture/humidity
and dirt. It must also be ensured that the permissible maximum ambient temperature (50° C) is
not exceeded. The device has to be protected against direct solar radiation.
Electrical connections should be made in accordance with the relevant VDE (Verein Deutscher
Elektrotechniker = Association of German Electrical Engineers) regulations and/or locally
applicable regulations.
Power relays installed in the control cabinet should be interference-suppressed by means of
RC-combinations.
The instrument features its own built-in mains filter. An additional external mains filter may be
necessary if voltage transients occur.
3.1 Instrument dimensions
Dimensions of the solenoid valve contoller HE 5721:
Macrolon housing: 180 x 180 x 85 mm (W x H x D)
The housing is applied with threaded holes 1x M20 x1.5 and 2x M32 x 1.5 for metrical
cable glands. Not used holes have to be closed dust-proof (IP65) with sealing caps.
3.2 Power supply
The HE 5721 is designed for mains operation at 100 – 240 VAC, 50 - 60 Hz.
(Options: 24 VDC).
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