Pulsafeeder PULSAlarm - Manual (Page 8)

2. Electrical
Figure 3 – switch and housing
If equipped with an optional pressure switch, install electrical wiring and conduit in accordance
with local electrical codes.
The switch is rated as follows:
30 VDC or 125 VAC 1 Ampere Resistive.
The switch is the SPDT (single pole, double throw) type and can therefore be connected to
either open or to close upon detection of diaphragm leak condition. Contacts or wires are
identified as follows:
Normally Open (NO) wire color WHITE
Normally Closed (NC) wire color RED
Common (Com) wire color BLACK
T HE ENCLOSURE IS LABELED WITH APPLICABLE SAFETY AGENCY RATINGS FOR
HAZARDOUS AREA INSTALLATION . S INCE THE SWITCH IS OF THE MECHANICAL
CONTACT TYPE , IT CAN NEVER QUALIFY AS NON - SPARKING ( NON -I NCENDIVE , OR “M”)
FOR OCCASIONAL AND SHORT - TERM HAZARDOUS AREA USE . P ROTECTION MUST BE
PROVIDED BY THE ENCLOSURE .