PCB Piezotronics 685B Series User manual

Model 685B0001A11
Electronic vibration switch, internal accelerometer, 0-1.5 in/sec pk, AC
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

The information contained in this document supersedes all similar information that
may be found elsewhere in this manual.
Service –Due to the sophisticated
nature of the sensors and associated
instrumentation provided by PCB
Piezotronics, user servicing or repair is
not recommended and, if attempted,
may void the factory warranty. Routine
maintenance, such as the cleaning of
electrical connectors, housings, and
mounting surfaces with solutions and
techniques that will not harm the
physical material of construction, is
acceptable. Caution should be observed
to ensure that liquids are not permitted
to migrate into devices that are not
hermetically sealed. Such devices
should only be wiped with a dampened
cloth and never submerged or have
liquids poured upon them.
Repair –In the event that equipment
becomes damaged or ceases to
operate, arrangements should be made
to return the equipment to PCB
Piezotronics for repair. User servicing or
repair is not recommended and, if
attempted, may void the factory
warranty.
Calibration –Routine calibration of
sensors and associated instrumentation
is recommended as this helps build
confidence in measurement accuracy
and acquired data. Equipment
calibration cycles are typically
established by the users own quality
regimen. When in doubt about a
calibration cycle, a good “rule of thumb”
is to recalibrate on an annual basis. It is
also good practice to recalibrate after
exposure to any severe temperature
extreme, shock, load, or other
environmental influence, or prior to any
critical test.
PCB Piezotronics maintains an ISO-
9001 certified metrology laboratory and
offers calibration services, which are
accredited by A2LA to ISO/IEC 17025,
with full traceability to SI through
N.I.S.T. In addition to the normally
supplied calibration, special testing is
also available, such as: sensitivity at
elevated or cryogenic temperatures,
phase response, extended high or low
frequency response, extended range,
leak testing, hydrostatic pressure
testing, and others. For information on
standard recalibration services or
special testing, contact your local PCB
Piezotronics distributor, sales
representative, or factory customer
service representative.
Returning Equipment –Following
these procedures will ensure that your
returned materials are handled in the
most expedient manner. Before
returning any equipment to PCB
Piezotronics, contact your local
distributor, sales representative, or
factory customer service representative
to obtain a Return Warranty, Service,
Repair, and Return Policies and
Instructions Materials Authorization
(RMA) Number. This RMA number
should be clearly marked on the outside
of all package(s) and on the packing
Service, Repair, and Return
Policies and Instructions

list(s) accompanying the shipment. A
detailed account of the nature of the
problem(s) being experienced with the
equipment should also be included
inside the package(s) containing any
returned materials.
A Purchase Order, included with the
returned materials, will expedite the
turn-around of serviced equipment. It is
recommended to include authorization
on the Purchase Order for PCB to
proceed with any repairs, as long as
they do not exceed 50% of the
replacement cost of the returned
item(s). PCB will provide a price
quotation or replacement
recommendation for any item whose
repair costs would exceed 50% of
replacement cost, or any item that is not
economically feasible to repair. For
routine calibration services, the
Purchase Order should include
authorization to proceed and return at
current pricing, which can be obtained
from a factory customer service
representative.
Contact Information –International
customers should direct all inquiries to
their local distributor or sales office. A
complete list of distributors and offices
can be found at www.pcb.com.
Customers within the United States may
contact their local sales representative
or a factory customer service
representative. A complete list of sales
representatives can be found at
www.pcb.com. Toll-free telephone
numbers for a factory customer service
representative, in the division
responsible for this product, can be
found on the title page at the front of this
manual. Our ship to address and
general contact numbers are:
PCB Piezotronics, Inc.
3425 Walden Ave.
Depew, NY14043 USA
Toll-free: [phone]
24-hour SensorLineSM: [phone]
Website: www.pcb.com
E-mail: [email protected]

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

DOCUMENT NUMBER: 21354
DOCUMENT REVISION: D
ECN: 46162
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
685B-Series Electronic Vibration Switch
Operating Guide with Enclosed Warranty Information
3425 Walden Avenue, Depew, New York 14043-2495
Phone [phone]
Fax [phone]
Toll Free Line 1-800-959-4IMI
MANUAL NUMBER: 34181
MANUAL REVISION: H
ECO# 47640

PAGE 2
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Table of Contents
Introduction...................................................................................................................... Page 3
General Features
Specifications.................................................................................................................. Page 4
Installation and Wiring..................................................................................................... Page 5
Installation & Dimensional Drawings
Pin Location Diagram- Models with Internal Accelerometer and Triac Relays
Pin Location Diagram- Models with Internal Accelerometer and Electromechanical Relays
Pin Location Diagram- Models with External Accelerometer and Triac Relays
Pin Location Diagram- Models with External Accelerometer and Electromechanical Relays
Configuring the 685B...................................................................................................... Page 11
Internal Diagram- Models with Triac Relays
Internal Diagram- Models with Electromechanical Relays
Using Calibration Mode
Connecting the Remote Reset
Connecting the Raw Vibration Output
Optional Accessories...................................................................................................... Page 14
080A209 Adapter Plate
699A05 Portable 4-20 mA Calibrator
ESD Sensitivity............................................................................................................... Page 16
Ordering Information/ Model Matrix................................................................................ Page 17

PAGE 3
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Introduction
The 685B-Series is an electronic vibration switch designed to monitor vibration levels and trip an alert when a
specified limit is exceeded. A second onboard relay trips an alarm that can be used to shut down a piece of
equipment or act as a secondary alert level. An onboard accelerometer with precision electronics insures
reliability and accuracy.
General Features
Embedded or external piezoelectric accelerometer for improved accuracy and frequency response.
Vibration range can be measured in acceleration, velocity or displacement (factory set).
Provides dual 5 Amp Triac (SPST) or 10 Amp Form C (SPDT) relay outputs.
Adjustable trip limits and time delay via single turn potentiometers.
Accommodates normally open (NO) and normally closed (NC) wiring schemes.
Continuous or latching switch action.
Local reset button and remote reset capability.
LED indicators for power, alert and alarm.
Screw terminal blocks for easy wiring.
Mounts directly to the equipment being monitored via four bolt pattern.
Flexible design allows for various custom requirements.
4-20 mA field calibration feature for improved accuracy.
Raw vibration & 4-20 mA outputs as standard.

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SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Specifications
Power Supply Voltage: …… 85-240 VAC, 12-30 VDC (factory set)
Power Supply Current: …… 150 mA max
Sensor Type: …… Piezoelectric Sensing Element
Standard Vibration Ranges: …… 0-5g pk, 0-1.5 ips pk, 0-3 ips pk, 0-50 mils pk-pk, 0-15 mils pk-pk
(factory set)
Frequency Response +/-3dB: …… 2Hz to 1Khz (120 – 60,000cpm)
Turn on Time Delay: …… 20 seconds
Alert/Alarm Time Delay: …… 0-45 seconds
Alert/Alarm Function Select: …… Latch or Continuous
Alert/Alarm Switches: …… 5A/245Vac Triac (SPST) or 10A/245Vac – 5A/30Vdc Form C Relay (SPDT)
Operating Temperature Range: …… -22 to 158°F (-30 to 70°C)
Storage Temperature Range: …… -40 to 257°F (-40 to 125°C)
Relative Humidity:.….. NEMA 4X Rating
Case Dimension W x H x D: …… 3.5 x 2.8 x 3.5in. (90 x 70 x 90mm)
Weight: …… 1.85 lbs. (839 grams)
Case Material: …… Aluminum Alloy
Input/Output Electrical Connectors: …… Screw Terminals
Screw Terminal Wire Size: …… 24-14 AWG (0.2-2.5 mm2)
Wiring Interface: …… Cord Grips (wire comp. dia. 0.2”- 0.35”) or ½” NPT Conduit Hubs
Mounting Hole Size: …… 0.21 inches
Mounting Screw Torque: …… 2- 5 ft. lbs. (3-7Nm)
LED Indicators:
Power: - Green
Alarm: - Red
Alert: - Yellow
Alert/ Alarm Setpoint: …… Single Turn Potentiometer (10-100% Full Scale Range)
Reset Function: …… Momentary Pushbutton Switch and/or Remote to Common.

PAGE 5
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Installation and Wiring
Installation
The 685B-Series is designed to be mounted directly on the equipment to be monitored using a four-bolt pattern.
There are also options to retrofit existing 3 bolt pattern installations. (Model 080A209 mounting plate required-
see optional accessories on page 13). Use grease between all surfaces to insure specified frequency response,
otherwise performance will be degraded. The axis of vibration measured by models with internal accelerometers
is perpendicular to the mounting orientation of the unit.
Standard Model Dimension Drawing with Cord Grips
Inch (mm)

PAGE 6
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Standard Model Dimension Drawing with ½” NPT Conduit Hubs
Inch (mm)

PAGE 7
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Explosion Proof Model Dimension Drawing
Inch (mm)
WARNING
AC and DC input signals and power supply voltages could be hazardous. DO NOT
connect live wires to screw terminal plugs, and DO NOT insert, remove, or handle screw
terminal plugs with live wires connected.

PAGE 8
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Connector and Pinout Diagram
The 685B-Series uses screw terminal connectors for all input and output connections.
Strip off 0.3” (8mm) of insulation from the connection wire ends. Feed the wire through the access ports, and
terminate the wire in the correct location. Once connected, tug lightly on the wire to confirm connection is secure.
Pin Location Diagram- Models with Internal Accelerometer and Triac Relays
Pin
Category
Description
1
AC Power
+ Power
2
- Power/Common
3
Earth Ground (Also connect to enclosure safety lug)
4
Alarm Output
Main Terminal 1
5
Main Terminal 2
6
Alert Output
Main Terminal 1
7
Main Terminal 2
8
N/A
N/A
9
N/A
10
Raw Vibration Output
Common
11
+Signal
12
Control Configurations
Remote Reset Connection (Do not apply power)
13
Common Connection
14
Calibration Connection
15
Current Output
- 4-20 mA
16
+ 4-20 mA

PAGE 9
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Pin Location Diagram- Models with Internal Accelerometer and Electromechanical Relays
Pin
Category
Description
1
AC Power
+ Power
2
- Power/Common
3
Earth Ground (Also connect to enclosure safety lug)
4
Alarm Output
Normally Closed (when dipswitch is in de-energized position)
5
Common connection
6
Normally Open (when dipswitch is in de-energized position)
7
Alert Output
Normally Closed (when dipswitch is in de-energized position)
8
Common connection
9
Normally Open (when dipswitch is in de-energized position)
10
Raw Vibration Output
Common
11
+Signal
12
Control Configurations
Remote Reset Connection (Do not apply power)
13
Common Connection
14
Calibration Connection
15
Current Output
- 4-20 mA
16
+ 4-20 mA

PAGE 10
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Pin Location Diagram- Models with External Accelerometer and Triac Relays
When the external 100mV/g ICP®sensor option is specified, an additional terminal block location is added to the
685B-Series. The external accelerometer is connected to +Sensor and –Sensor positions as indicated in the
above figure and on the product label locate inside the top cover. The cable shield to the accelerometer should be
grounded as required by local codes as well as to limit RFI/EMI interference.
Pin
Category
Description
1
AC Power
+ Power
2
- Power/Common
3
Earth Ground (Also connect to enclosure safety lug)
4
Alarm Output
Main Terminal 1
5
Main Terminal 2
6
Alert Output
Main Terminal 1
7
Main Terminal 2
8
N/A
N/A
9
N/A
10
Sensor Input &
Raw Vibration Output
+ Sensor
11
- Sensor/Common
12
+Signal
13
Control Configurations
Remote Reset Connection (Do not apply power)
14
Common Connection
15
Calibration Connection
16
Current Output
- 4-20 mA
17
+ 4-20 mA

PAGE 11
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Pin Location Diagram- Models with External Accelerometer and Electromechanical Relays
When the external 100mV/g ICP®Sensor option is specified, an additional terminal block location is added to the
685B-Series. The external accelerometer is connected to +Sensor and –Sensor positions as indicated in the
above figure and on the product label locate inside the top cover. The cable shield to the accelerometer should be
grounded as required by local codes as well as to limit RFI/EMI interference.
Pin
Category
Description
1
AC Power
+ Power
2
- Power/Common
3
Earth Ground (Also connect to enclosure safety lug)
4
Alarm Output
Normally Closed (when dipswitch is in de-energized position)
5
Common connection
6
Normally Open (when dipswitch is in de-energized position)
7
Alert Output
Normally Closed (when dipswitch is in de-energized position)
8
Common connection
9
Normally Open (when dipswitch is in de-energized position)
10
Sensor Input &
Raw Vibration Output
+ Sensor
11
- Sensor/Common
12
+Signal
13
Control Configurations
Remote Reset Connection (Do not apply power)
14
Common Connection
15
Calibration Connection
16
Current Output
- 4-20 mA
17
+ 4-20 mA

PAGE 12
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Configuring the 685B-Series
Internal Diagram- Models with Triac Relays
The internal diagram displays the location of the control features for the triac versions of the 685B-Series. The
alert and alarm set points are adjusted via the single turn potentiometers. The alarm relay is set using the first
potentiometer, and the alert relay is set using the third. The alert relay trips when the set percentage of the alarm
value is reached. Time delays for both functions are controlled using the second and fourth potentiometers. Alert
and alarm relays can be reset remotely by using the RESET and COMM pins or by using the internal reset switch
as seen on the upper right hand corner of the diagram.
Using the dipswitches beneath the terminal connectors, relay operation can be selected to be either latch or
continuous, and each relay can be separately configured to be normally open (de-energized) or normally closed
(energized). There is also a dipswitch to activate the calibration mode for condition simulation during the setup
process. This is explained in detail on page 13.

PAGE 13
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Internal Diagram- Models with Electromechanical Relays
The internal diagram displays the location of the control features for the relay versions of the 685B-Series. The
alert and alarm set points are adjusted via the single turn potentiometers. The alarm relay is set using the first
potentiometer, and the alert relay is set using the third. The alert relay trips when the set percentage of the alarm
value is reached. Time delays for both functions are controlled using the second and fourth potentiometers. Alert
and alarm relays can be reset remotely by using the RESET and COMM pins or by using the internal reset switch
as seen on the upper right hand corner of the diagram.
Using the first dipswitch beneath the terminal connectors, relay operation can be selected to be either latch or
continuous. The second and third dipswitches set the alert and alarm relay configuration to be energized or de-
energized. The diagram above indicates the contacts that are normally open and normally closed when the dip
switch is set to “de-energized. When the dipswitch is changed to “energized”, the normally open and normally
closed contacts would be reversed. The fourth dipswitch is used to activate the calibration mode for condition
simulation during the setup process. This is explained in detail on page 12.

PAGE 14
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Using Calibration Mode
The 685B-Series has the unique ability to be calibrated using a 4-20 mA simulator. (IMI Sensors model 699A05,
see “Accessories” page) This allows for a much more accurate and quantifiable calibration versus manually
attuning the switch. The following steps allow for simple calibration using this configuration.
1) Connect the 4-20 mA simulator signal across the COMM and CAL pins.
2) Turn the calibration dipswitch to “on”. This will disable the switch’s ability to measure physical
vibration.
3) Turn both time delay potentiometers to “zero” for calibration purposes. This can be adjusted to
desired delay after calibration.
4) Assume that 4 mA equals zero vibration and 20 mA equals full scale vibration. Then calculate, in mA,
the vibration level for which the alert and alarm switches should trip.
5) Using the 4-20 mA simulator, send the appropriate alarm signal based on the calculation in the
previous step for the alarm signal.
6) Adjust the “SP” Alarm set point potentiometer to the point when the red Alarm LED illuminates.
7) Using the 4-20 mA simulator, repeat step 5 for the Alert signal.
8) Adjust the “SP” Alert set point potentiometer to the point where the yellow Alert LED illuminates. It is
important to set the Alarm potentiometer first because the Alert signal acts as a percentage of the
value set for Alarm.
9) Disconnect the 4-20 mA simulator.
10) Turn “off” the calibration dipswitch.
** Warning: To avoid damage, insure 685B-Series is under power prior to applying
the 4-20mA signal from the simulator. **
Testing the Calibration
Pushing the “Test” button inside the housing simulates full scale vibration and should illuminate both the alert and
alarm LED’s. This feature can be used to adjust time delays to the desired values. This can be accurately
calculated using the “Test” button and a stopwatch.
Connecting the Remote Reset
The 685B-Series allows for remote reset when the switch is in latch mode via a short between the RESET and
COMM pins.
Connecting the Raw Vibration Output
All models in the 685B-Series offer the option for obtaining accelerometer’s raw vibration signal. Models with
internal accelerometers output 100 mV/g. To obtain this signal using digital analyzer, turn the ICP® power OFF at
the digital analyzer input. Connect the analyzer to the RV OUTPUT and COMM pins with the common connection
on the COMM pin and the signal connection on the RV OUTPUT pin.

PAGE 15
SENSORS AND INSTRUMENTATION FOR MACHINE CONDITION MONITORING
Optional Accessories
Model 080A209 Adapter Plate
To retrofit old style vibration switch bolt patterns