User manual

2
Installation
This bulletin should be used by experienced personnel as a guide to the
installation of the Model 5550 vibration switch. Selection or installation
of equipment should always be accompanied by competent technical
assistance.
Before proceeding to install and wire the unit, read and thoroughly
understand these instructions. The switch model number should be
checked to confirm that you have the correct hazardous area rating
for your application.
Installation
1—The sensitive axis of the vibration switch is perpendicular to the mount-
ing base. The preferred mounting is with the sensitive axis in the horizontal
plane, since most machines vibrate more in that plane. Mount the switch
solidly to the frame of the machine. In most cases the switch or mounting
bracket will come preinstalled.
2—Remove the cover and wire the switch(es) into the alarm or shutdown
circuit. Do not exceed switch contact ratings listed in the specifications.
Keep field wiring away from the moving part of the mechanism.
3—Observe all local electrical codes. Observe the following for ATEX
installations:
4—All the power must be switched off before opening of the enclosure in
an explosive atmosphere.
5––The Vibration Switch must be electrically connected by means of a
flameproof cable gland or stopping box certified to EN 50018.
6––For ambient temperatures below -14ºF and above +140ºF use field
wiring suitable for both minimum and maximum ambient temperature.
7––Reinstall the cover by first insuring the sealing gasket is in place and
properly seated in the grove in the housing. Place the cover on the unit
and install the four cover bolts. Torque the four bolts to 16 ft/lbs. Caution
should be used to not over torque the bolts as this could damage the
housing and compromise the seal.
8––The temporary conduit entry plugs are placed in the housing to provide
physical protection for the treads during shipping. Once the unit is installed
in the field these plugs must be replaced. These temporary plugs do not
provide adequate environmental protection for the switch when installed
in the field.
Caution