External Electrical Interlock In The Switchgear Cabinet - Honeywell Fema DCM-203-574 Series Assembly And Operating Instructions Manual

1. Basic Equipment of the Pressure Switches
1.5 External Electrical Interlock in
the Switchgear Cabinet
A pressure switch can also be used as
limiter if an electrical interlock is connected
in series. In pressure limitation for steam
and hot water boilers, the external interlock
is permissible only if it is assured that the
pressure switch is of "special construction".
NOTE: Because of special permits, in
these installations, the use of the
DWR, DWAM, and SDBAM is
recommended!
For electrical interlock, design circuits
according to DIN EN 50156 / VDE 0116-1
or apply valid local standards!
For examples for switching circuits serving
electrical interlock function, see next page.
16 MU2B-0238GE51 R0616D