Honeywell Fema DCM-203-574 Series Assembly And Operating Instructions Manual page 51

thread permissible only up to 4 bar. Use
flat gasket ring for pressure > 4 bar).
Switch housing
Sturdy housing made of seawater-resistant
aluminum die casting with plug connection
(200) or terminal connection (300).
Degree of protection acc. to EN 60529
IP 54 (housing 200)
IP 65 (housing 300)
Materials
See data-sheet
NOTE: All pressure switches of the
DCM, DNM, DNS, VCM, VNM,
VNS and DDCM series – as well
as their Ex versions – are cali-
brated by the manufacturer for
falling pressure.
MU2B-0238GE51 R0616D
1. Basic Equipment of the Pressure Switches
This means that for switching with
rising pressure:
(lower range limit)
The smallest switching point that can be
set is higher than the start of the scale by
the value of the switching differential. The
device then switches back to the start of
the scale in case of dropping pressure.
(upper range limit)
The highest switching pressure that can be
set is the end point of the scale. The
device switches back as soon as the
pressure dropped by the value of the
switching differential.
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