PCB Piezotronics IMI SENSORS 685A19 User manual

Model 685A19
Linear Adjust Mechanical Vibration Switch
Installation and Operating Manual
For assistance with the operation of this product,
contact PCB Piezotronics, Inc.
Toll-free: 800-959-4464
24-hour SensorLine: 716-684-0001
Fax: [phone]
E-mail: [email protected]
Web: www.imi-sensors.com

Manual 21354 Rev E
ECN 50523
Repair and Maintenance
PCB guarantees Total Customer Satisfaction through its
“Lifetime Warranty Plus” on all Platinum Stock Products
sold by PCB and through its limited warranties on all other
PCB Stock, Standard and Special products. Due to the
sophisticated nature of our sensors and associated
instrumentation, field servicing and repair is not
recommended and, if attempted, will void the factory
warranty.
Beyond routine calibration and battery replacements
where applicable, our products require no user
maintenance. Clean electrical connectors, housings, and
mounting surfaces with solutions and techniques that will
not harm the material of construction. Observe caution
when using liquids near devices that are not hermetically
sealed. Such devices should only be wiped with a
dampened cloth—never saturated or submerged.
In the event that equipment becomes damaged or ceases
to operate, our Application Engineers are here to support
your troubleshooting efforts 24 hours a day, 7 days a
week. Call or email with model and serial number as well
as a brief description of the problem.
Calibration
Routine calibration of sensors and associated
instrumentation is necessary to maintain measurement
accuracy. We recommend calibrating on an annual basis,
after exposure to any extreme environmental influence,
or prior to any critical test.
PCB Piezotronics is an ISO-9001 certified company whose
calibration services are accredited by A2LA to ISO/IEC
17025, with full traceability to SI through N.I.S.T. In
addition to our standard calibration services, we also offer
specialized tests, including: sensitivity at elevated or
cryogenic temperatures, phase response, extended high
or low frequency response, extended range, leak testing,
hydrostatic pressure testing, and others. For more
information, contact your local PCB Piezotronics
distributor, sales representative, or factory customer
service representative.
Returning Equipment
If factory repair is required, our representatives will
provide you with a Return Material Authorization (RMA)
number, which we use to reference any information you
have already provided and expedite the repair process.
This number should be clearly marked on the outside of
all returned package(s) and on any packing list(s)
accompanying the shipment.
Contact Information
PCB Piezotronics, Inc.
3425 Walden Ave.
Depew, NY14043 USA
Toll-free: [phone]
24-hour SensorLine: [phone]
General inquiries: in[email protected]
Repair inquiries: [e-mail]
For a complete list of distributors, global offices and sales
representatives, visit our website, www.pcb.com.
Safety Considerations
This product is intended for use by qualified personnel
who recognize shock hazards and are familiar with the
precautions required to avoid injury. While our equipment
is designed with user safety in mind, the protection
provided by the equipment may be impaired if equipment
is used in a manner not specified by this manual.
Discontinue use and contact our 24-Hour Sensorline if:
Assistance is needed to safely operate equipment
Damage is visible or suspected
Equipment fails or malfunctions
For complete equipment ratings, refer to the enclosed
specification sheet for your product.
Definition of Terms and Symbols
The following symbols may be used in this manual:
DANGER
Indicates an immediate hazardous
situation, which, if not avoided, may
result in death or serious injury.

Manual 21354 Rev E
ECN 50523
CAUTION
Refers to hazards that could damage
the instrument.
NOTE
Indicates tips, recommendations and
important information. The notes
simplify processes and contain
additional information on particular
operating steps.
The following symbols may be found on the equipment
described in this manual:
This symbol on the unit indicates that
high voltage may be present. Use
standard safety precautions to avoid
personal contact with this voltage.
This symbol on the unit indicates that
the user should refer to the operating
instructions located in the manual.
This symbol indicates safety, earth
ground.

Manual 21354 Rev E
ECN 50523
PCB工业监视和测量设备 - 中国RoHS2公布表
PCB Industrial Monitoring and Measuring Equipment - China RoHS 2 Disclosure Table
部件名称
有害物质
铅(Pb)
汞
(Hg)
镉
(Cd)
六价铬(Cr(VI))
多溴联苯 (PBB)
多溴二苯醚(PBDE)
住房
O
O
O
O
O
O
PCB板
X
O
O
O
O
O
电气连接器
O
O
O
O
O
O
压电晶体
X
O
O
O
O
O
环氧
O
O
O
O
O
O
铁氟龙
O
O
O
O
O
O
电子
O
O
O
O
O
O
厚膜基板
O
O
X
O
O
O
电线
O
O
O
O
O
O
电缆
X
O
O
O
O
O
塑料
O
O
O
O
O
O
焊接
X
O
O
O
O
O
铜合金/黄铜
X
O
O
O
O
O
本表格依据 SJ/T 11364 的规定编制。
O：表示该有害物质在该部件所有均质材料中的含量均在 GB/T 26572 规定的限量要求以下。
X：表示该有害物质至少在该部件的某一均质材料中的含量超出 GB/T 26572 规定的限量要求。
铅是欧洲RoHS指令2011/65/ EU附件三和附件四目前由于允许的豁免。
CHINA RoHS COMPLIANCE

Manual 21354 Rev E
ECN 50523
Component Name
Hazardous Substances
Lead (Pb)
Mercury (Hg)
Cadmium (Cd)
Chromium VI
Compounds
(Cr(VI))
Polybrominated
Biphenyls (PBB)
Polybrominated
Diphenyl Ethers
(PBDE)
Housing
O
O
O
O
O
O
PCB Board
X
O
O
O
O
O
Electrical Connectors
O
O
O
O
O
O
Piezoelectric Crystals
X
O
O
O
O
O
Epoxy
O
O
O
O
O
O
Teflon
O
O
O
O
O
O
Electronics
O
O
O
O
O
O
Thick Film Substrate
O
O
X
O
O
O
Wires
O
O
O
O
O
O
Cables
X
O
O
O
O
O
Plastic
O
O
O
O
O
O
Solder
X
O
O
O
O
O
Copper Alloy/Brass
X
O
O
O
O
O
This table is prepared in accordance with the provisions of SJ/T 11364.
O: Indicates that said hazardous substance contained in all of the homogeneous materials for this part is below the limit
requirement of GB/T 26572.
X: Indicates that said hazardous substance contained in at least one of the homogeneous materials for this part is above the limit
requirement of GB/T 26572.
Lead is present due to allowed exemption in Annex III or Annex IV of the European RoHS Directive 2011/65/EU.

SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Model 685A09/685A19/29/39 Mechanical Vibration Switch
Operating Guide
3425 Walden Avenue, Depew, New York 14043-2495
Phone [phone]
Fax [phone]
Toll Free Line 1-800-959-4IMI
MANUAL NUMBER: 56534
MANUAL REVISION: A
ECN NUMBER: 43636

PAGE 2
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Table of Contents
Introduction...................................................................................................................... Page 3
General Features
Warning
Installation....................................................................................................................... Page 4
Internal Switches............................................................................................................. Page 4
Remote Reset and Power On Delay ............................................................................ Page 5-6
Setting Up The Switch.................................................................................................. Page 6-7
Typical Installation Locations........................................................................................ Page 8-9

PAGE 3
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Introduction
The Mechanical Vibration Switch is a shock sensitive mechanism for shutdown of engine or electric motor
powered equipment. This switch uses a patent pending linear adjustment magnetic latch technology to ensure
reliable operation. Pushing the reset button moves the tripping latch into a magnetically held position. A
shock/vibration will move the magnet beyond this holding position, thus freeing the spring loaded tripping latch to
transfer the contacts and shut down the machinery.
General Features
Designed to Detect Shock/Vibration in 3 Planes of Motion
Fully Adjustable, with patent pending linear adjustment technology
Includes Magnetic Latching Feature
Accommodates normally open (NO) and normally closed (NC) wiring schemes
Manual Reset Button
IP66 rated enclosure
Remote Reset
-685A19: 24VDC Remote Reset
-685A29: 120VAC Remote Reset
-685A39: 240VAC Remote Reset
Top cover is secured with socket head cap screws for easy access to wiring terminals
WARNING
AC and DC input signals and power supply voltages could be hazardous.
- DO NOT connect live wires to screw terminal plugs
- DO NOT insert, remove, or handle screw terminal plugs with live wires connected
- DO NOT make any adjustments to the setpoint with live wires present
- DO NOT open the unit if machine is powered or running
- DO NOT open the unit if the Relays are energized
- DO NOT open the unit if the Reset Coil is energized
- DO NOT make any adjustments if machine is energized and/or power is present
anywhere in the switch.
BEFORE BEGINNING INSTALLATION OF THIS IMI PRODUCT:
Stop the machine.
Disconnect all electrical power to the machine.
Make sure the machine cannot operate during installation by following proper lock out tag out procedures.
Follow all safety warnings of the machine manufacturer.
Read and follow all installation instructions.

PAGE 4
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Installation:
The vibration switch is sensitive to shock and vibration in all three planes of motion –up/down, front/back and
side/side. Side/side (in the same plane as the reset pushbutton) is the most sensitive. For maximum sensitivity,
mount the unit so that the side with the reset button is in-line with the direction of rotation of the machine.
The vibration switch must be firmly attached/mounted to the machine so that all mounting surfaces are in rigid
contact with the mounting surface of the machine. For best results, mount the instrument in-line with the direction
of rotating shafts and/or near bearings. In other words, the reset push button should be mounted pointing into the
direction of shaft rotation. It may be necessary to provide a mounting plate or bracket to attach the 685Ax9 to the
machine. The mounting bracket should be thick enough to prevent induced acceleration/vibration upon the 685x9.
Typically 1/2 in. (13mm) thick plate is sufficient.
CAUTION: A dust boot is provided on the reset pushbutton for all series to prevent moisture or dust intrusion. The
sensitivity adjustment has an o-ring compression seal; if possible, the mounting orientation should be on a
horizontal plane or with the sensitivity adjustment pointing down if possible.
1) Firmly secure the unit to the equipment using the base foot mount.
2) Make the necessary electrical connections to the vibration switch. See Internal Switches in the next section
for electrical terminal locations and for typical wiring. DO NOT EXCEED VOLTAGE OR CURRENT RATINGS
OF THE CONTACTS. Follow appropriate electrical codes/methods when making electrical connections. Be
sure that the run of electrical cable is secured to the machine and is well insulated from electrical shorting.
Use of conduit is recommended.
NOTE: If the electrical cable crosses a pivot point such as at the pivot of the walking beam, be sure to
allow enough slack in the cable so that no stress is placed on the cable when the beam moves.
If conduit is not used for the entire length of wiring, conduit should be used from the electrical supply box to a
height above ground level that prevents damage to the exposed cable from the elements, rodents, etc. or as
otherwise required by applicable electrical codes. If conduit is not attached directly to the switch, use a strain relief
bushing and a weatherproof cap on the exposed end of the conduit. A “drip loop” should be provided in the cable
to prevent moisture from draining down the cable into the conduit should the weatherproof cap fail.
Internal Switches
The vibration switch uses 2 SPDT switch terminals with removable screws for all connections (see below).Wire
the relays depending on application, either Normally Open or Normally Closed. The Normally Open and Normally
Closed are referenced to the Common screw terminal connector.
WARNING: Do not exceed the maximum relay ratings as noted below.
Rated
Voltage
Resistive
Load
Inductive
Load
Motor, Lamp Load
N.C
N.O
AC 125V
15A
10A
4A
2A
AC 250V
15A
10A
3A
1.5A
AC 480V
3A
2A
-
-
DC 8V
15A
15A
-
-
DC 14V
15A
10A
-
-
DC 30V
6A
5A
-
-
DC 125V
0.5A
0.05A
-
-
DC 250V
0.25A
0.03A
-
-

PAGE 5
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Remote Reset and Power On Delay
Models 685A19, 685A29 and 685A39 have provisions to reset the switch remotely. The vibration switch can be
remotely reset after being tripped by applying the correct voltage across the reset terminal as shown below.
NOTE: There is no positive/negative polarity needed for the wiring.
NOTE: While the power is applied to the remote reset terminals, the switch cannot be tripped.
Power On Delay:
685A19 Only –A 24VDC power supply is needed to remotely reset the switch by energizing a solenoid. The
24VDC power source must be capable of supplying at least 2A of current. Upon power up, the unit will need the
2A to energize the remote reset coil. Depending on ambient temperature, this will decrease to approximately 0.4A
after 5-10 seconds. After that time, the coil can be energized indefinitely.
To protect the remote reset solenoid from overheating, the unit has a built in thermistor that will limit the coil
current after a certain amount of time. This time is dependent on ambient temperature and if the reset coil was
recently energized. Since the coil needs the peak current only for a short period of time, the thermistor lowers the
current but it is still strong enough to hold the switch in reset mode. Please note that the switch will start
feeling warm to the touch if the remote reset coil is left energized for more than a few minutes.
Remote
Reset
Terminal
Chassis
Screw
Terminal

PAGE 6
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
685A29 Only –A 120VAC power supply is needed to remotely reset the switch by energizing a solenoid. Upon
applying 120VAC to the solenoid, the unit will need 184mA to energize the remote reset coil. At standard ambient
temperature, the solenoid has a 25% “on” 75% “off” cycle.
Maximum allowed On Time ( remote reset energized ) versus minimum Off Time ( remote reset de-energized )
On Time ( 25% )
Off Time ( 75% )
Total Time ( 100% )
4 Minutes ( Max )
12 Minutes
16 Minutes
2 Minutes
6 Minutes
8 Minutes
1 Minute
3 Minutes
4 Minutes
30 seconds
1.5 Minutes
2 Minutes
NOTE: If using the solenoid for a power on delay, do not exceed the “on” times listed. If the “on” time exceeds 4
minutes and/or the “off” time is shortened before energizing the solenoid again, the solenoid will be permanently
damaged.
685A39 Only –A 240VAC power supply is needed to remotely reset the switch by energizing a solenoid. Upon
applying 240VAC to the solenoid, the unit will need 92mA to energize the remote reset coil. At standard ambient
temperature, the solenoid has a 25% “on” 75% “off” cycle.
Maximum allowed On Time ( remote reset energized ) versus minimum Off Time ( remote reset de-energized )
On Time
Off Time
Total Time ( 100% )
4 Minutes ( Max )
12 Minutes
16 Minutes
2 Minutes
6 Minutes
8 Minutes
1 Minute
3 Minutes
4 Minutes
30 seconds
1.5 Minutes
2 Minutes
NOTE: If using the solenoid for a power on delay, do not exceed the “on” times listed. If the “on” time exceeds 4
minutes and/or the “off” time is shortened before energizing the solenoid again, the solenoid will be permanently
damaged.
Setting Up The Switch
The 685AX9 covers a wide range of sensitivity and needs to be adjusted specifically for the machine on which it is
installed. After the switch has been installed in a satisfactory location ( see last section of manual for some typical
mounting locations), the sensitivity adjustment will need to be increased or decreased so that the switch does not
trip during start-up or under normal operating conditions.
NOTE: If using a remote reset model ( eg: 685A19/685A29/685A39 ), the minimum sensitivity setting for the
remote reset to work properly is 1 turn clockwise. That is, with no motion, if turning the Sensitivity adjustment
screw counterclockwise until the magnet disengages, for the remote reset to work properly, the minimum setting
is 1 turn clockwise from that location.
This is typically done as follows:
1) REPLACE ALL COVERS, LIDS, AND ELECTRICAL ENCLOSURES.
2) Press the reset push button (see Figure 1, Figure 1A) to engage the magnetic latch. Be sure that the
reset button remains depressed. If it does not remain depressed, turn sensitivity adjustment screw (see
Figure 2, Figure 2A) clockwise until it does. A large screwdriver is needed to turn the Sensitivity
Adjustment Screw. Do not try to turn the Sensitivity Adjustment Screw with your fingers as this could lead
to injury.

PAGE 7
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Figure 1: Reset Button Figure 2: Sensitivity Adjustment Screw
Figure 2A: Resetting the Switch Figure 2A: Adjusting the Sensitivity
3) Start the machine.
4) If the instrument trips on start-up, allow the machine to stop. Turn the sensitivity adjustment ¼ to ½ turn
clockwise. Depress the reset button and restart the machine. Repeat this process until the unit does not
trip on start-up.
5) If the instrument does NOT trip on start-up, stop the machine. Turn the sensitivity adjustment screw ¼ to
½ turn counter-clockwise. Repeat the start-up/stop process until the instrument trips on start-up. Turn the
sensitivity adjustment screw ¼ to ½ turn clockwise (less sensitive). Restart the machine to verify that the
instrument will not trip on start-up.
6) Verify that the unit will trip when abnormal shock/vibration exists.

PAGE 8
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Typical Installation Locations
Cooling Tower Fan and Motor
Reciprocating Compressor

PAGE 9
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Vibratory Screens

Model Number
685A19 LINEAR ADJUST MECHANICAL VIBRATION SWITCH Revision: A
ECN #: 51040
Performance ENGLISH SI
Measurement Range 7 g pk 68.7 m/s² pk
Frequency Range 0 to 6,000 cpm 0 to 100 Hz
Relay 3A Form C 480 VAC 3A Form C 480 VAC
Relay(Contacts)(DPDT) Normally Open / Closed Normally Open / Closed
Con trol Interface
Reset Function Momentary Pushbutton
Switch
Momentary Pushbutton
Switch
Remote Reset +/- 24 VDC +/- 24 VDC
Environmental
Temperature Range(Operating) -40 to 140 °F -40 to 60 °C
Enclosure Rating IP66 IP66
Physical
Size (Width x Height x Depth) 4.35 in x 3.30 in x 4.35 in 110.5 mm x 83.8 mm x 110.5
mm
Weight 2.8 lb 1,271 gm
Sensing Element Magnet Magnet
Housing Material Aluminum Alloy Aluminum Alloy
Electrical Connector Screw Terminals Screw Terminals
Screw Terminal Wire Size 24-14 AWG 0.2 - 2.5 mm²
Cable Input 3/4-14 NPT 3/4-14 NPT
Mounting Hole Size 0.25 in 6.4 mm
Sensing Geometry Inertial Element Inertial Element
All specifications are at room temperature unless otherwise specified.
In the interest of constant product improvement, we reserve the right to change specifications without notice.
OPTION AL VERSION S
Optional versions have identical specifications and accessories as listed for the standard model except
where noted below. More than one option may be used.
NOTES:
Date: 08/17/2020 Date: 08/17/2020 Date: 08/17/2020 Date: 08/17/2020 60551
Entered: LK Engineer: NJF Sales: MC Approved: NJF Spec Number:
Phone: [phone]
Fax: [phone]
E-Mail: [e-mail]
3425 Walden Avenue, Depew, NY 14043

1
1
2
2
3
3
4
4
A A
B B
CODE
IDENT. NO.
52681
DWG. NO.
SCALE: SHEET
DRAWN CHECKED ENGINEER
TITLE
UNLESS OTHERWISE SPECIFIED TOLERANCES ARE:
DIMENSIONS IN MILLIMETERS
[ IN BRACKETS ]
ANGLES 2 DEGREES
3425 WALDEN AVE. DEPEW, NY 14043
[phone] E-MAIL: [e-mail]
DIMENSIONS IN INCHES
ANGLES 2 DEGREES
FILLETS AND RADII
.003 - .005
FILLETS AND RADII
0.07 - 0.13
OUTLINE DRAWING
56470
1 OF 1
.5X
MECHANICAL VIBRATION SWITCH
685A09, A19, A29, A39
DECIMALS XX ±.03
XXX ±.010
DECIMALS X ± 0.8
XX ± 0.25
KRM 1/4/17 JDM 1/4/17 JDB 1/4/17
56470
PCB Piezotronics Inc. claims proprietary rights in
the information disclosed hereon. Neither it nor any
reproduction thereof will be disclosed to others
without the written consent of PCB Piezotronics Inc.
REVISIONS
REV DESCRIPTION DIN
C ADDED NOTE 1 46319
SENSITIVITY
ADJUSTMENT
SCREW
RESET SWITCH
GROUND SCREW
4.35 [110.5]
4.35 [110.5] 3.30 [83.8] 3.70 [94.0]
3.70 [94.0]
.250 [6.35]4X THRU
2.05 [51.9]
2.75 [69.9] 3/4 - 14 NPT
CONDUIT PORT
1.) THREADED PLUG NOT SHOWN