IMI SENSORS 683A101000 User manual

Model 683A101000
Indicator/Controller (for use w/ ICP® sensors)
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.

SENS
ORS AND INSTRUMENTAT
ION FOR MACHINE COND
ITION MONITORING
Model 683A1 ICP®Process Indicator/Controller
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: 19163
MANUAL REVISION: C
ECN NUMBER: 18874

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Table of Contents
Introduction………………………………………………………………………………………. Page 3
General Features, Software Features
Specifications……………………………………………………………………………………. Page 4
Controls and Indicators………………………………………………………………………… Page 5
Glossary of Programming Symbols…………………………………………………………… Page 6
Software Logic Tree…………………………………………………………………………….. Page 7
Programming the 683A1..……………………………………………………………………… Page 8
Wiring and Installation………………………………………………………………………… Page 13
Configuring the 683A1 ……………………………………………………………………….. Page 17
Accessories…………………………………………………………………………………….. Page 18
ESD Sensitivity………………………………………………………………………………… Page 20
Ordering Information………………………………………………………………………….. Page 21
Warranty/Servicing
Warranty, Service & Return Procedure.......................................................................... Page 22
Customer Service.......................................................................................................... Page 23

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Introduction
The Model 683A1 ICP®Process Indicator/Controller is an intelligent 4-digit modular panel meter with software
features for monitoring, measurement, and control applications complete with 0.56”LED in a 1/8 DIN 96x48 case.
The 683A1 operates from a single power supply and will supply 24Vdc/4mA excitation for sensor power. The
indicator/controller comes equipped with two 5 Amp Form A relays with independent setpoints and time delay.
General Features
 External transmitters, signal conditioners, or power supplies can be eliminated by direct connection of the
sensor to the indicator/controller.
 Optional isolated 16-bit analog output. User or factory scalable to 4 to 20 mA across any desired digital
span from ± one count to the full-scale range of –1999 to 9999 (12000 counts).
 24Vdc/4mA excitation to power sensor.
 Standard Internal DIP switch selectable vibration ranges include:
Acceleration (g’s) Velocity (in/sec) Displacement (mils p-p)
5.000 0.500 25.0
10.00 1.000 50.0
20.00 2.000 100.0
 Two 5 Amp Form A relays, additionally two 5 Amp Form A or 10 Amp Form C relays are available.
 Programmable Time Delay to 9999 seconds.
 Internal DIP switch selection for Peak or RMS display.
 User specified, factory installed, High and Low pass 2-pole filtering.
 Analog output signal connection (RV) for conducting frequency analysis and machinery diagnostics.
Software Features
Three-button front panel programming of:
 Scale Factor and Offset
 Decimal point setting.
 Four-level brightness control of digital display.
 Peak and valley view and reset.
 Four programmable setpoints.
 Adjustable delay-on-make and delay-on-break time for setpoints 1 and 2.
 Relay activation can be selected to occur above (HI) or below (LO) each setpoint.

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Specifications
 Input Specs: ...... 100mV/g
 ICP®Sensor Excitation:...... 24Vdc/4mA, ±1Vdc/±1mA
 A/D Converter: ...... 14 bit single slope
 Accuracy: ...... ±2.0% of Scale Factor + 2 counts
 Frequency Response: 3Hz to 10Khz (Standard)
Acceleration: -3dB at 3Hz ±0.5Hz, -3dB at 10kHz ±0.5kHz
Velocity: -3dB at 3.5Hz ±0.5Hz, -3dB at 10kHz ±0.5kHz
Displacement: -3dB at 3.5Hz ±0.5Hz, 1000Hz max.
 Temp. Coeff.: ...... 100 ppm/°C (Typical)
 Warm up time: ...... 2 minutes
 Conversion Rate: ...... 5 conversions per second (Typical)
 Display: ...... 4 digit 0.56" Red LED display, Range –1999 to 9999 counts.
 Polarity: ...... Assumed positive. Displays –negative
 Decimal Selection: ...... Front panel button selectable, X•X•X•X•
 Positive Overrange: ...... Top segments of digital display flash
 Negative Overrange: ...... Bottom segment of digital display flash
 Relay Output
: ...... Two 5 A Form A (SPST) relays 230VAC/30VDC standard.
Additionally two 5 Amp Form A (SPST) or 10 Amp Form C (SPDT) relays.
 Optional Analog Output: ...... Isolated 16 bit user scalable 4-20mA retransmit @ 0 to 500 ohms max
loop resistance.
 Power Supply: ...... Auto sensing wide range supply 85-265 VAC / 95-370 VDC @ 2.5W max 3.5W
 Operating Temp.: ...... 0 to 60 °C
 Storage Temp: ...... –20 °C to 70 °C.
 Relative Humidity: ...... <95% (non condensing)
 Case Dimensions: ...... 1/8 DIN, Bezel: 96x48 mm (3.78”x1.89”)
Depth behind bezel 117 mm (4.61”)
Plus 11.8 mm (0.47”) for Right-angled connectors, or plus 20 mm (0.79”) for Straight-thru connectors.
 Weight: ...... 6.5 oz., 8.5 oz when packed

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Controls and Indicators
Front Panel Buttons
 Program Button
The button is used to move from one program step to the next. When pressed at the same time as the
button, it initiates the calibration mode. When pressed at the same time as the button, it initiates
the setpoint setting mode.
 Up Button
When in the operational display, pressing the button alone, allows you to view and reset the Peak and
Valley (Highest and Lowest Readings.)
When in calibration mode or the setpoint setting mode the button is used to increase the value of
the displayed parameter.
 Down Button
When in the operational display, pressing the button alone allows you to view, but not change, the
setting of setpoint 1,2,3,& 4.
When in calibration mode or the setpoint setting mode the button is used to decrease the value of
the displayed parameter.

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Glossary of Programming Symbols
To explain software-programming procedures, logic diagrams are used to visually assist in following the
programming steps. The following symbols are used to represent various functions and associated display
elements of the 683A1:
Symbol Explanation Symbol Explanation
This symbol represents the
OPERATIONAL DISPLAY.
[ScALE]
[9999]
Text or numbers shown between
square brackets in a procedure
indicate the programming code
name of the function or the value
displayed on the meter display.
When a button is shown, press and
release it to go onto the next step in
the direction indicated by the arrow.
When two or more buttons are
shown, each with an arrow, this
indicates there are a number of
programming choices.
When the and buttons are
shown together, the display value
can be increased by pressing and
releasing the button or
decreased by pressing and
releasing the button.
When two buttons are shown side by
side and enclosed by a dotted line,
they must be pressed at the same
time then released to go onto the next
programming step.
When the and buttons are
shown with two displays, either
display can be selected by pressing
and releasing the or
buttons.
If the display is shown with XXXX it
means the value displayed will be the
previously set value. When a number
is shown it indicates the initial factory
default setting or a specific “example
number.”
When there are more than two
display selections they are shown
in brackets below the first display
and are also selectable by pressing
and releasing the or
buttons.
When two displays are shown
together with bursts, this indicates
that the display is toggling (flashing)
between the name of the function and
the value.
A dotted box indicates these
functions are omitted or bypassed
when the related hardware is not
present.
is the PROGRAM button, is the UP button, is the DOWN button.

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Software Logic Tree
The 683A1 is an intelligent meter with a hierarchical software structure designed for easy programming and
operation, as shown below in the software logic tree. After the meter has been powered up, the four digits light up
for three seconds and then settle to the operational display indicating the input signal.

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Programming the 683A1
Digital Scaling
The 683A1 meter may be rescaled without applying an external signal by changing the Offset and Scale factor.
Offset is the reading that the meter will display for a 0mV input. The Offset may be set to any value from –1999 to
+9999. The default value of the Offset is 0000.
Scale Factor is the gain of the meter. The displayed reading is directly proportional to the Scale Factor. The
default value of the Scale Factor is 1000 for a 1ips accelerometer, but it may be set to any value between –1999
and +9999.
For an input of 2.000V a calibrated meter will read 1000 with the default Scale Factor of 1000, 2000 with a Scale
Factor of 2000, and 500 with a Scale Factor of 500.
Digital Scaling Procedure
STEP A Enter the Calibration Mode
1) Press the and the buttons at the same time.
Display toggles between [cAL] and [oFF].
2) Press the or button.
Display changes from [oFF] to [on].
3) Press the button. Display toggles between [cAL] and [out].
STEP B Select Between Calibration of Input or Output
Note: If the analog output option is not present, Step B is skipped and the
program goes directly from Step A to Step C.
1) Press the or button to select the display toggling from
[cAL] to [iP].
2) Press the
button. Display toggles between [oFFS] and the
previous offset setting.
STEP C Set the Offset on the Digital Display
1) Using the and buttons, adjust the digital display to the
desired offset. This is the reading the meter will display for a
0mV input.
2) Press the
button. Display toggles between [SCAL] and the
previous scale factor.
STEP D Set the Scale factor on the Digital Display
1) Using the and buttons, adjust the meter display to the
desired Scale Factor. The default value is 1000, for which a
2.000V input will read 1000. If the Scale factor is changed the
display will change proportionally. Therefore if the Scale
Factor is changed to 2000 then for the same 2.000V input the
display will read 2000.
2) Press the button.
The Digital Calibration Procedure Mode is Now Complete.
The menu branches to the DECIMAL POINT AND BRIGHTNESS
SELECTION, (see page 10) and the display flashes [dP] and the previous
decimal point selection.

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Two Point Analog Output Range Setting and Calibration
STEP A Enter the Calibration Mode
1) Press the and the buttons at the same time.
Display toggles between [cAL] and [oFF].
2) Press the or button. Display changes from [oFF] to [on].
1) Press the button. Display toggles between [cAL] and [out].
Note: If at this point the display skips directly to toggle between [oFFS] and the
previous [oFFS] setting, the software is detecting that the optional analog output
hardware is NOT installed.
STEP B Enter the Analog [oUT] Output Mode
1) Press the
button. Display toggles between [cLo] and internal scale
factor.
STEP C Set or Calibrate the [cLo] Low Analog Output Range
1) Connect a multimeter to pins 16 and 17 on the output module. See
Rear Panel Pinouts on Page 8). Using the and buttons, adjust
the analog output to the desired low value as shown on the
multimeter display. cLo may be adjusted to any value from –
0.3mA to
17mA. (Factory Default is 4mA)
2) Press the button. Display toggles between [cHi] and internal scale
factor.
STEP D Set or Calibrate the [cHi] Analog Output Range
1) Using the and buttons, adjust the analog output to the desired
high value as shown on the multimeter display. cHi may be adjusted
to any value from 17mA to 21mA. (Factory Default is 20mA)
2) Press the button. The display exits the calibration mode and
returns to the operational display.
Note:
Having established the Low and High range of the analog output, the digital
span can now be selected which will set the two digital points between which the
analog output will occur. (See Digital Span selection next page).

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Decimal Point and Brightness Selection
Digital Span Selection for Analog Range Output
STEP A Enter the Decimal Point and Brightness Mode Through the Sub
Menu [CAL]{oFF]
2) Press the and the buttons at the same time.
Display toggles between [cAL] and [oFF].
3) Press the button. Display shows the previous [dp] selection.
STEP E Set the Decimal Point
1) Using the and buttons, adjust the display to the desired decimal
point setting. (Factory Default is X.XXX)
2) Press the button. Display toggles between [Br] and the previous
[Br] setting.
STEP F Set the Display Brightness
1) Using the and buttons, adjust the display to the desired
brightness setting (4 is the brightest setting).
2) Press the button. Display brightness changes to new setting and
display toggles between [Anhi] and the previous [Anhi] setting.
STEP G Setting the Digital Span Point for Analog High Output
1) Using the and buttons, adjust the display to the desired digital
value which sets the point at which the selected analog high output
range will occur. (Factory Default is 1000)
2) Press the button. Display toggles between [AnLo] and the
previous [AnLo] setting.
STEP H Setting the Digital Span Point for Analog Low Output
1) Using the and buttons, adjust the display to the desired digital
value which sets the point at which the selected analog low output
range will occur. (Factory Default is 0)
2) Press the button. The display exits the calibration mode and
returns to the operational display.
Note: Any two digital scale points from –1999
to 9999 can be selected. The digital
scale points for analog high and analog low can be reversed for a 20mA to 4mA
output. The span of the digital scale can be as small as two counts however small
spans cause the 16 bit D to A to increment in stair case steps.

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Setpoint Setting and Relay Configuration Mode
The following programming steps are required to enter the setpoint values and
configure the relay functions in a meter with four relays using four setpoints. Generally
if less than four relays are installed the software auto detects the missing relays and
deletes reference to them from the menu. In some cases setpoints without relays are
operational for display purposes only.
STEP A Enter the Setpoint Mode
1) Press the and buttons at the same time.
Display toggles between [SP1] and the previous [SP1] setting.
STEP B Setpoint1 (SP1)
1) Using the and buttons, adjust the display to the desired SP1 value.
2) Press the button. Display toggles between [doM] and the previous [doM]
setting.
STEP C Set the SP1 Delay-on-Make (doM) Delay Time Setting
1) Using the and buttons, adjust the display to the desired [doM] value
(0 to 9999 seconds). The reading must continuously remain in an alarm
condition until this delay time has elapsed before the relay will make contact
(energize).
2) Press the button. Display toggles between [dob] and the previous [dob]
setting.
STEP D Set the SP1 Delay-on-Break (dob) Delay Time Setting
1) Using the and buttons, adjust the display to the desired [dob] value (0-
9999 seconds). The reading must continuously remain in a non-
alarm condition
until this delay time has elapsed before the relay will break contact (de-
energize).
2) Press the button. Display toggles between [hYST] and the previous [hYST]
setting.
STEP C Set the Hysteresis Setting for Setpoint 1
1) Using the and buttons, adjust the display to the desired hysteresis [hYST]
value.
2) Press the button. Display toggles between [SP2] and the previous [SP2]
setting.
Note: Steps, F, G, H, and J have functionally the same procedure as steps B, C, D,
and E shown above.
STEP F Set Setpoint 2 (SP2)
STEP G Set the SP2 Delay-on-Make (doM) Delay Time Setting
STEP H Set the SP2 Delay-on-Break (dob) Delay Time Setting
STEP I Set the Hysteresis Setting for Setpoint 2
1) Using the and buttons, adjust the display to the desired hysteresis [hYST]
value.
2) Press the button. Display toggles between [SP3] and the previous [SP3]
setting.
SETPOINT 3
, 4, AND RELAY ACTIVATION MODE CONTINUED NEXT PAGE.

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STEP J Set Setpoint 3 (SP3)
(No [doM] or [dob])
1) Using the and buttons, adjust the display to the desired SP3 value.
2) Press the button. Display toggles between [hYST] and the previous [hYST]
setting.
STEP K Set the Hysteresis Setting for Setpoint 3
1) Using the and
buttons, adjust the display to the desired hysteresis [hYST]
value.
2) Press the button. Display toggles between [SP4] and the previous [SP4]
setting.
STEP L Set Setpoint 4 (SP4) (No [doM] or [dob])
1) Using the and buttons, adjust the display to the desired SP4 value.
2) Press the button. Display toggles between [hYST] and 0.
STEP M Set the Hysteresis Setting for Setpoint 4
1) Using the and buttons, adjust the display to the
desired hysteresis [hYST]
value.
2) Press the button. Display toggles between [rLYS] and the previous relay
setting.
STEP N Set Relay Activation mode [rLYS]
(h) High the relay energizes when the setpoint is exceeded. (L) Low the relay
energizes below the setpoint. The setpoint is indicated from left to right SP1, SP2, SP3,
SP4. 1) Using the and buttons, adjust the reading on the display to the desired
relay settings: [LLLL], [LhLh], [hLhL], [hhhh].
If only 2 relays installed [Lh--], [hL--], [hh--], [LL--].
2) Press the button. The meter exits the setpoint mode and returns to the
operational display.
The Setpoint Relay programming mode is now complete.

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Wiring and Installation
Pinout Diagram
The Rear View Meter diagram shows
the meter with the relay configuration:
dual 10 Amp Form C and dual 5 Amp
Form A relays. An analog output
module is also shown as installed.
The 683A1 uses plug-in type screw
terminal connectors for all input and
output connections. The power supply
connections (pins 14 and 15) have a
unique plug and socket outline to
prevent cross connection. The main
board and input signal conditioner use
right –angled connectors as standard.
The output module uses straight–thru
connectors as standard.
Connectors
WARNING
AC and DC input signals and power supply voltages can 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.

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Typical Wiring Diagram (CE Power Supply Option)
To Maintain Conformance I/O Shields must be connected to Pin 3 on the Panel Meter
and all Supplied Accessories must be wired as shown (Power Supply Option 2).
1 2 3 4 5 8 9 10 11 14 15
ICP SENSOR/
SIMULATOR
RV OUTPUT
DMM
+
-
+
-
SHIELD
N/C N/C N/C N/C
3EB1LB
+
-
CORCOM
EMI FILTER
+
-
AC
LINE
AC
NEUTRAL GND
METALLIC
ENCLOSURE

PAGE 15
SENSORS AND INSTRUME
NTATION FOR MACHINE
CONDITION MONITORING
Pin Descriptions
Input Signal - Pins 1 to 6
Pin 1 +ICP®Sensor Excitation/Signal
Pin 2 -ICP®Sensor Excitation
Pin 3 ICP®Sensor Shield (if applicable)
Pin 4 + RV Output (Analog Sensor Signal)
Pin 5 - RV Output (Analog Sensor Signal)
Pin 6 No Connection
Relay Output - Pins 8 to 12
Pin 8 SP1 NO. (Normally Open 5 Amp Form A.)
Pin 9 SP1 NO.
Pin 10 SP2 NO. (Normally Open 5 Amp Form A.)
Pin 11 SP2 NO.
Pin 12 No Connection
AC/DC Power Unit - Pins 14 and 15
Pin 14 AC/DC Neutral. Neutral power supply line.
Pin 15 AC/DC Line. Live power supply line.
OPTIONAL TOP BOARD PINS
Analog Output - Pins 16 and 17
Pins 16 and 17 are the analog output pins on the optional output module.
Pin 16 Positive (+) analog output.
Pin 17 Negative (-) analog output.
Rear Panel Function –Pins 18 to 21
Pin 18 DIM. By connecting the display dim (DIM) pin to the COMMON pin, the display brightness setting is
halved.
Pin 19 COMMON. To activate the LOCK or DIM functions from the rear of the meter, the respective pins have to
be connected to the COMMON pin. This pin is connected to the internal power supply ground.
Pin 20 HOLD. By connecting the HOLD pin to the COMMON pin, the display reading is frozen, however, A/D
conversions continue. When the HOLD pin is disconnected from the COMMON pin, the correct reading is
displayed.
Pin 21 LOCK. By connecting the LOCK pin to the COMMON pin, the meter’s parameters can be viewed but not
changed.
Top Board Secondary Relay Output –Pins 22 to 29
Quad 5A Form A Relays or Dual 10Amp Form C Relays.
Pin 22 SP1 (Quad 5A SPST Relay Option)
Pin 23 SP1 (Quad 5A SPST Relay Option), SP3 COMM (10A SPDT Additional Relay Option)
Pin 24 SP2 (Quad 5A SPST Relay Option), SP3 NC (10A SPDT Additional Relay Option)
Pin 25 SP2 (Quad 5A SPST Relay Option), SP3 NO (10A SPDT Additional Relay Option)
Pin 26 SP3 (Quad 5A SPST Relay Option)
Pin 27 SP3 (Quad 5A SPST Relay Option), SP4 COMM (10A SPDT Additional Relay Option)
Pin 28 SP4 (Quad 5A SPST Relay Option), SP4 NC (10A SPDT Additional Relay Option)
Pin 29 SP4 (Quad 5A SPST Relay Option), SP4 NO (10A SPDT Additional Relay Option)