General Information - Enovation Controls Murphy 20.SS Serie Instrucciones De Instalación

Installation Instructions for 20.SS series
Shock / Vibration Switch, ATEX case
Please read the following instructions before installing. A visual inspection of this product for damage during
shipping is recommended before mounting. It is your responsibility to have a qualified person install the unit and
make sure installation conforms with local codes.
BEFORE BEGINNING INSTALLATION OF THIS MURPHY PRODUCT

Disconnect all electrical power to the machine.

Disable operation of the machine during installation.

Follow all safety recommendations of the machine manufacturer.

Read and follow the installation instructions.
Description
The Murphy shock and vibration switches are available in a variety of models for applications on machinery or
equipment where excessive vibration or shock can damage the equipment or otherwise poses a threat to safe
operation. A set of contacts is held in a latched position through a mechanical latch and magnet mechanism.
As the level of vibration or shock increases an inertia mass exerts force against the latch arm and forces it away
from the magnetic latch causing the latch arm to operate the contacts. Sensitivity is obtained by adjusting the gap
between the magnet and the latch arm plate.
Applications include all types of rotating or reciprocating machinery such as cooling fans, engines, pumps,
compressors, pump jacks etc.
Warranty
A two year limited warranty on materials and workmanship is provided with this Murphy product. Details are
available on request and are packed with each unit.
20.SS series

Sensitivity range

Contact rating

Electrical connection

Operating temperature:

ATEX case

ATEX mounting

Certification

Standards

Execution

General Information

WARNING
Specifications
0 to 7 g (depending on mounting position)
5A @ 125 - 480 VAC;
0.5A @ 125 VDC;
0.25A @ 250 VDC;
2A resistive, 1A inductive @ 0 - 30 VDC.
Manual reset models: 2 SPDT microswitches.
Remote reset models (discontinued 2018-09): 1 SPDT microswitch.
M20 x 1.5 cable entry
–40 to +55°C (–40 to +131F)
Copper-free cast alloy, IP 65
2 hole bolt pattern
ISSeP 11 ATEX019
2014/34/EU: EN 60079-0: 2009, EN60079-1: 2007, EN60079-31: 2009
II 2 G Ex d IIC T6 Gb
3
yi5152
revision K, 2018-09-17
catalogue section 20