ABB MS40/EX Operating Instructions Manual - page 4
4 MS40/EX Magnetic Level Gauge Switch | Operating instruction manual
4.0 Mounting & Installation (cont’d)
Notes:
•
All field wiring that is connected to the MS40 switch must comply with applicable National Electric Code guidelines.
•
Do not use the switch on chambers with operating temperatures above 300°F without using insulation between the switch
and the chamber to keep the temperature of the switch from exceeding 300°F. Also, verify tht the operating temperature of the
switch is less than the applicable flammable gas ignition temperature (for applications in explosive atmospheres).
•
On KM26 chambers that are funished with factory installed insulation blankets the switch may be mounted via special rod
mount brackets to a factory installed switch mount rod that is external to the insulation.
•
Any conduit of fittings connected to a magnetically activated switch should be aluminum or some other non-magnetic material.
This is necessary to avoid interference with the ioperation of the KM26 Magnetic Liquid Level Indicator or other magnetically
activated switches.
•
Other switches can be added at any position, at any time, without the concern for additional process piping or valves.
•
Two switches can be mounted so that they can trip at the same point or at two different points separated by less than the length
of a switch.
•
Option B is not available.
5.0 Maintenance
The MS40 does not require any routine maintenance in normal day to day operation
Warning: If there is a need to take the switch out of service or disconnect it for any reason, then make sure the
circuit is de-energized or that the area is known to be non-hazardous.
MS40 Connection Diagram
(Shown with float below switch)