Metrix 5550 User manual

5550 & 5550G MECHANICAL VIBRATION SWITCHES
Hazardous Area Installaon Manual
DOC# M8905 • REV R (May 2016)
1180
1180
MODEL 5550
MODEL 5550G
Before proceeding to wire and install the
Model 5550 switch, read and thoroughly
understand these instrucons. They are
intended for experienced personnel who
require only basic installaon guidance,
and assume that the 5550 has already
been selected and applied properly for
the machinery at hand. Please contact
Metrix or its local representave for
addional assistance. See also the “Sup-
plamental Informaon” secon of this
manual for addional technical resources
available free-of-change on our website
at www.metrixvibraon.com
OVERVIEW
The Model 5550 Mechanical Vibraon
Switch oers basic protecon against gross
changes in structural seismic acceleraon.
Its operang mechanism is purely mechani-
cal and consists of a tension spring aached
to a pivong plate on an over-center
fulcrum – magnets are not employed.
Normally, this plate is in an untripped posi-
on. However, in the presence of sucient
seismic acceleraon (whether vibratory or
impact), the trip plate will pivot beyond this
over-center posion, snapping to a stable
tripped posion where it contacts an inter-
nal microswitch relay, changing the state

Doc# M8905 • REV R (May 2016) Page 2 of 8
SUPPLEMENTARY INFORMATION
Refer to product datasheet 1004461, and operaon and maintenance manual 1231558 avail-
able at www.metrixvibraon.com.
MOUNTING
Observe the switch nameplate to ensure that it has the correct hazardous approval and
environmental rangs for the intended area. Refer to Metrix datasheet 1004461 for a list of
all available hazardous area approvals, environmental rangs, and other ordering opons.
See also the Hazardous Area Approvals secon of this manual for hazardous area approvals
informaon.
The switch’s sensive axis is in line with the reset plunger stem. Mount the switch solidly
to the machine’s frame such that this axis is aligned with the direcon of expected vibratory
and/or impact moon. If the machine vibrates along mulple axes (and most machines do),
mount the switch to align with the direcon of highest vibraon. It is typical for machines
to vibrate more in the horizontal direcon than in the vercal direcon, as the foundaon
normally constrains up-and-down moon more than side-to-side moon.
NOTE: The 5550 Mechanical Vibraon Switch is not intended
for use on high-speed turbomachinery or on machines were
changes in seismic acceleraon smaller than 1G must be
reliably detected. Instead, Metrix oers other electronic vibraon
sensing soluons that are beer suited for such applicaons.
NOTE: Do not aempt to measure vibraon or impact perpendicular
to the switch’s sensive axis. The trip plate is free to move along
this axis only and will not respond to moon in other direcons.
of the relay. This relay is available for external wiring connecons where on/o changes in
electrical connuity can be used to trip the machine and/or annunciate excessive vibraon.
Once the switch has assumed its tripped posion, it must be reset manually by means of the
external reset plunger, or by means of an oponal remote electrical reset. The remote reset
capability can also be used as a startup delay to hold the switch in an untripped state for as
long as coil excitaon is supplied – up to 30 seconds (the maximum duraon is governed by
a non-adjustable, factory-installed thermistor circuit). The startup delay feature is useful
during machinery startup when vibraon in excess of the normal trip seng may be tempo-
rarily incurred.

Doc# M8905 • REV R (May 2016) Page 3 of 8
CONDUIT
When aaching conduit, observe the following:
• Avoid long runs of unsupported conduit that can transfer unwanted impacts or vibra-
on of the conduit, rather than of the machine.
• Orient conduit such that accumulated moisture or condensaon does not drain into the
switch and consider the use of J-traps or other drain mechanisms.
• Units with NPT conduit holes (ordering opon E=1, 2, 3, and 7) have ¾” NPT threads.
Units with metric conduit holes (ordering opon E=4, 6, and 8) have M20 x 1.5 threads.
Refer to datasheet 1004461 for a complete list of ordering opons.
• Use proper conduit seals meeng the environmental requirement of the installaon to
prevent ingress of moisture and dust.
WIRING
• Remove the cover and wire the switch (es) into the alarm or shutdown circuit.
• Extra care should be taken to not damage the spring mounted on the underside of the
cover. Damage to this spring could prevent the switch from being reset.
• Do not exceed switch contact rangs listed on the cover.
• Observe all local electrical codes.
• All power must be switched o before opening of the enclosure in an explosive atmo-
sphere.
• The Vibraon Switch must be electrical connected by means of a ameproof/dust cable
gland or stopping box cered to:
IEC60079-0: 2011(EN60079-0:2012), IEC60079-1: 2007(EN60079-1:2007)
and IEC60079-31: 2008(EN60079-31:2009).
• For ambient temperatures below –10°C, use eld wiring suitable for the minimum
ambient temperature.
• Reinstall the cover by rst insuring the o-ring is in place and properly seated in the
grove in the housing. Place the cover on the unit and install the four cover screws.
Torque these screws to 6-7 /lbs.
NOTE: Route internal wiring away from the moving part of
the switch mechanism and secure so that it cannot move or
loosen over me. Wiring that impedes trip plate movement
may result in a switch that does not trip properly or at all.
NOTE: The disposable plasc plugs that ship in each
conduit hole provide only physical thread protecon
during shipping and handling. They are not
designed for use as permanent hole plugs and do
not provide adequate environmental protecon
for the switch when installed in the eld.
NOTE: Do not over-torque the bolts as this could
damage the housing and compromise the seal.

Doc# M8905 • REV R (May 2016) Page 4 of 8
SETPOINT ADJUSTMENT
The setpoint is adjusted by means of a set screw, accessible on the switch’s cover. This set
screw makes very small changes to the angle of the internal tension spring, thereby increas-
ing or decreasing the seismic acceleraon level required to trip the device. The set screw
can be adjusted over a range of approximately 2 full turns (16 g’s peak); a 1/8th turn of this
set screw represents approximately 1g and is considered the smallest adjustment for which
repeatable results can be obtained. Turn the screw clockwise to increase the setpoint; turn
counter-clockwise to decrease the setpoint.
The switch orientaon is dened as the direcon in which the top of the reset plunger faces.
The switch ships from the factory with the setpoint at approximately 2g with the switch
oriented in the upward vercal posion, and 1g when oriented in the horizontal posion.
The factory default setpoint is not meant to be indicave of allowable vibraon on any
parcular machine or applicaon. It is the responsibility of the user to determine the allow-
able vibraon levels for their machine and adjust the setpoint accordingly. Refer to Metrix
5550 & 5550G User Guide / Installaon Manual (doc 1231558) for addional step-by-step
guidance on establishing and adjusng the setpoint for your machinery. The manual can be
downloaded from www.metrixvibraon.com.
REMOTE RESET AND STARTUP LOCKOUT
All Model 5550 Mechanical Switches can be reset locally using the manual reset plunger.
Addionally, those ed with the oponal electrical reset circuit can be remotely actuated.
The remote reset mechanism consists of an electrical solenoid in series with a thermistor. To
reset the switch remotely, apply the rated voltage (see nameplate) to the reset circuit ter-
minals momentarily. This will energize the solenoid and push the trip plate from its tripped
posion back to its untripped posion.
Some machines exhibit elevated vibraon during startup, above the established trip setpoint
for normal operaon. To accommodate these situaons, the same circuit may also be used
to provide a trip lockout during machine startup. Where vibraon above the normal trip
setpoint may be present temporarily as the machine runs through and it would be other-
wise impossible to start the machine without tripping. To use the startup lockout feature,
apply the rated voltage to the reset terminals connuously. This will energize the solenoid
connuously and keep the switch in its untripped posion. The lockout will persist for 30
seconds, or as long as voltage is connuously applied, whichever is shorter (the thermistor in
this circuit which will automacally de-energize the solenoid aer approximately 30 seconds
even if excitaon voltage persists at the reset terminals). If the voltage is applied connu-
ously rather than using an external mer or sequencer, please note that the voltage must be
removed from the reset circuit when the machine is stopped to allow the thermistor to cool
o. If this is not done, it will not be possible to reset the switch remotely.
NOTE: The setpoint is dependent on the switch’s physical orien-
taon. A switch facing upward, downward, and horizontally will
trip at three disnctly dierent acceleraon levels for the same
set screw adjustment. This is due to the force of gravity and how it will
either aid or oppose the relave ease of trip plate moon, depending
on switch orientaon. For this reason, establish the desired setpoint
only when the switch is in its nal mounted posion.

Doc# M8905 • REV R (May 2016) Page 5 of 8
NOTE: If the machine is restarted immediately aer a shutdown, the
lockout period will be shortened because the thermistor will be hot. An
increase in the ambient temperature will also shorten the lockout period.
IMPORTANT SAFETY INFORMATION
General Safety Summary
Review the following safety precauons to avoid injury and prevent damage to this product
or any products connected to it.
• USE ONLY AS SPECIFIED
To avoid potenal hazards, use this product only as specied. Only qualied personnel
should perform installaon and removal procedures.
• CONNECT AND DISCONNECT PROPERLY
Do not connect or disconnect this product while it is connected to a live power source.
• GROUND THE PRODUCT
The housing of this product should be connected to earth ground. Before energizing the
product, ensure its housing is properly grounded.
• OBSERVE ALL TERMINAL RATINGS
To avoid re or shock hazard, observe all rangs and markings on the product. Consult
the individual secons of this manual for further informaon before making connecons
to the product.
• DO NOT OPERATE WITHOUT COVER
The cover serves mulple purposes that may include protecon against moisture and
dust ingression, protecon of personnel from electrical shock, and protecon against
ignion of ammable atmospheres when used in locaons with hazardous area rangs.
Do not use the device without its cover except when making adjustments or connecons
as noted in this manual.
• AVOID EXPOSURE TO CIRCUITRY
Do not touch exposed electrical connecons and components when power is present.
• DO NOT OPERATE WITH SUSPECT FAILURES
If you suspect there is damage to this product, have it inspected by qualied personnel.

Doc# M8905 • REV R (May 2016) Page 6 of 8
HAZARDOUS AREA APPROVALS
MODEL 5550
IECEx Approval
(World)
IEC Markings:
Ex d IIB + H2 T6 Gb
Ex tb IIIC T85°C Db Ta -40°C to
+70°C IP66
IECEx BAS10.0020
IEC Standards:
IEC60079-0:2011
IEC60079-1:2007
IEC60079-31:2008
CAUTION: TO
REDUCE RISK OF
IGNITION OF HAZ-
ARDOUS ATMO-
SPHERES, DISCON-
NECT THE SUPPLY
CIRCUIT BEFORE
OPENING. KEEP
ASSEMBLY TIGHTLY
CLOSED WHEN IN
OPERATION. CABLE
TEMPERATURE RISE
15K - USE SUITABLE
C A B L E .
ATTENTION: AFIN
DE PREVENTIR
L-INFLAMMATION
D’ATMOSPHERES
DANGERE-
USES COUPER
L’ALIMENTATION
ELECTRIQUE
CIRCUIT AVANT
D’OUVRIR COF-
FRET GARDER LE
COUVERCLE BIEN
FERMETANT QUE
LES CIRCUITS SONT
SOUS TONSION.
TEMPERATURE DE
CABLE MONTE 15K
- UTILISEZ CABLE
APPROPRIE
ATEX Approval
(Europe)
ATEX Markings:
II 2GD Ex d IIB + H2 T6 Gb
Ex tb IIIC T85°C Db Ta -40°C to
+70°C IP66
B a s e e f a 1 0 AT E X 0 0 9 8
EN Standards:
EN60079-0:2012
EN60079-1:2007
EN60079-31:2009
UL Approval
(North
America)
UL Markings:
Models 5550-2XX-XXX or
5550-7XX-XXX:
Class I, Div 1, Groups B,C,D, Class
II, Div 1,
Groups E,F,G, Type 4 or 4X, IP66
Models 5550-1XX-XXX or
5550-6XX-XXX:
Class I, Div 1, Groups C,D, Class
II, Div 1,
Groups E,F,G, Type 4 or 4X, IP66
UL/CSA Standards:
UL 508
UL 698
CSA C22.2 No. 14
CSA C22.2 No. 25
CSA C22.2 No. 30
1180

Doc# M8905 • REV R (May 2016) Page 7 of 8
MODEL 5550G
IECEx Approval
(World):
IEC Markings:
Ex d IIC T6 G b
Ex tb IIIC T85°C Db Ta
-40°C to +70°C IP66
IECEx BAS10.0095X
IEC Standards:
IEC60079-0:2011
IEC600079-1:2007
IEC600079-31:2008
CAUTION: TO REDUCE RISK
OF IGNITION OF HAZARDOUS
ATMOSPHERES, DISCONNECT THE
SUPPLY CIRCUIT BEFORE OPENING.
KEEP ASSEMBLY TIGHTLY CLOSED
WHEN IN OPERATION. CABLE
TEMPERATURE RISE 15K - USE
S U I TA B L E C A B L E .
ATTENTION: AFIN DE PRE-
VENTIR L-INFLAMMATION
D’ATMOSPHERES DANGEREUSES
COUPER L’ALIMENTATION ELEC-
TRIQUE CIRCUIT AVANT D’OUVRIR
COFFRET GARDER LE COUVERCLE
BIEN FERMETANT QUE LES
CIRCUITS SONT SOUS TENSION.
TEMPERATURE DE CABLE MONTE
15K - UTILISEZ CABLE APPROPRIE.
ATEX Approval
(Europe):
ATEX Markings:
I I 2 G D E x d I I C T 6 G b
Ex tb IIIC T85°C Db Ta
-40°C to +70°C IP66
B a s e e f a 1 0 A T E X 0 1 7 7
EN Standards:
EN60079-0:2012
EN60079-1:2007
EN60079-31:2009
1180

Doc# M8905 • REV R (May 2016) Page 8 of 8
info@metrixvibraon.com
www.metrixvibraon.com
8824 Fallbrook Dr. Houston, TX 77064, USA
Tel: [phone] • Fax: [phone]
Aer Hours (CST) Technical Assistance: 1.713.452.9703
This electronic equipment was manufactured according to high quality stan-
dards to ensure safe and reliable operaon when used as intended. Due to its
nature, this equipment may contain small quanes of substances known to be
hazardous to the environment or to human health if released into the environ-
ment. For this reason, Waste Electrical and Electronic Equipment (commonly
known as WEEE) should never be disposed of in the public waste stream. The
“Crossed-Out Waste Bin” label axed to this product is a reminder to dispose of this product
in accordance with local WEEE regulaons. If you have quesons about the disposal pro-
cess, please contact Metrix Customer Services.
ENVIRONMENTAL INFORMATION