Mitutoyo EJ-102N User manual

No. 99MBC139A
Date of publication: October 1, 2020
User's Manual
- Instructions for use -
Read this document thoroughly before operating
the product. After reading, retain it close at hand for
future reference.
This English language version of the document
contains the original instructions.
Compact Display Unit
for Linear Gage
EJ Counter
EJ-102N
EJ-102NE
*99MBC139A*

No. 99MBC139A
■Notice regarding this document
yMitutoyo Corporation assumes no responsibilities for any damage to the product, caused by its use
not conforming to the procedure described in this document.
yIntheeventoflossordamagetothisdocument,immediatelycontactaMitutoyosaleso󰀩ceor
your dealer.
yRead this document thoroughly before operating the product. In particular, be sure to fully under-
stand "Safety Precautions" and "Precautions for Use" in the preface.
yThe contents of this document are based on information current as of October 2020.
yNo part or whole of this document may be transmitted or reproduced by any means without prior
written permission of Mitutoyo Corporation.
ySomescreendisplaysinthisdocumentmaybehighlighted,simpliedorpartiallyomittedforcon-
venienceofexplanation.Inaddition,someofthemmaydi󰀨erfromactualonestotheextentthatno
user will misunderstand the functions and operations.
yThe corporation, organization and product names that appear in this document are their trade-
marks or registered trademarks.
©2020 Mitutoyo Corporation. All rights reserved.
■Product names and model numbers covered in this document
Product name Model number
Compact Display Unit for Linear Gage EJ Counter EJ-102N
EJ-102NE

iNo. 99MBC139A
Conventions and Wording Used in This Document
■Safety reminder conventions and wording warning against potential hazards
WARNING
Indicates a hazard with a medium level of risk which, if not avoided, could
result in death or serious injury.
NOTICE
Indicates a potentially hazardous situation which, if not avoided, may result
in property damage.
■Conventions indicating prohibited and mandatory actions
Indicates concrete information about prohibited actions.
Indicates concrete information about mandatory actions.
Indicates that grounding needs to be implemented.
■Conventions and wording indicating referential information or reference
location
Tips
Indicates further information and details relevant for the operating methods and procedures that are
explained in that section.
Indicates reference location if there is information that should be referred to in this document or an
extraneous User's Manual.
E.g.: For details about XX, see “1.4 Part Names” on page 5.

ii No. 99MBC139A
Safety Precautions
Read these “Safety Precautions” thoroughly before operating the product to use it properly.
These safety precautions include such information as to prevent injury to the operator and other per-
sons, damage to property and product defects. Be sure to observe these precautions carefully.
■Precautions for this product
WARNING
Do not disassemble the product. Otherwise you may be subject to electric shock, and there is a risk of
breakageorreduetoashortcircuitcausedbymetallicpowdersthathavegotteninsidetheproduct.
Precautions for Use
■Use and handling of the product
●This product is a measuring instrument.
Do not use it for any purposes other than measuring.
●This product is for industrial usage.
Do not use this product for purposes other than for industrial usage.
●The product is a precision instrument.
Handle this product with care. Do not apply excessive shock or force to any of the parts during opera-
tion.

iii No. 99MBC139A
■Environment for placement
This product is designed for indoor use. To ensure optimal performance for this precision equipment,
take the following conditions into account when installing this product.
• Vibration
Install this product in an environment where it will be subject to minimal vibration. Using this product
inaplacewithsignicantvibrationforanextendedperiodoftimemayresultinmalfunctionofthe
precision components.
• Dust
Dustintheinstallationsitenegativelya󰀨ectstheelectricalcomponents.Installthisproductinan
environment where it will be subject to minimal dust.
• Sunlight
If this product is exposed to direct sunlight, the heat will cause deformations in the main unit, neg-
ativelya󰀨ectingitsoperation.Ifinstallingthisproductinanenvironmentthatisexposedtodirect
sunlight,suchasnearawindow,isunavoidable,protectitfromthesunlightbycurtainingito󰀨,etc.
• Ambient temperature and humidity
Avoid using the product in any place that is subject to sudden changes in temperature or humidity.
When using this product in the following environments, take necessary shielding measures.
• Where noise is generated due to static electricity
• Wheretheelectriceldstrengthishigh
• Where power wires and motor lines pass nearby
• Wherethereisriskofdirectcontactwithmaterialssuchaschips,cuttinguidsorwater
• Where there is risk of exposure to radiation
• Where there is the risk of exposure to corrosive gas
■Maintenance
Donotuseorganicsolventssuchasthinnerorbenzine.Gentlywipedirto󰀨oftheproductwithasoft,
tightly woven cloth.
■Power supply
• When using the optional AC adapter, do not connect it to any power line that carries high current,
such as lines used with machine tools or large CNC measuring instruments; use a separate power
line instead.
• When using a commercial power source, use a power cable with a length of less than 30 m, and
make a one-to-one connection between the instrument and the power source.
• Use a power source that is rated for 10 V–27 V and an output current of 3 A or greater. Never use
this power source with other electric equipment that runs at a high voltage and/or large current.
• Avoid outdoor wiring.
• Be sure to connect this product to ground.
• Connect the AC adapter to a grounded three-slot outlet.

iv No. 99MBC139A
Electromagnetic Compatibility (EMC)
This product complies with the EU EMC Directive. Note that in environments where electromagnetic
interferenceexceedsEMCrequirementsdenedinthisdirective,appropriatecountermeasuresare
required to assure the product performance.
This product is an industrial product, and is not intended to be used in residential environment. If this
product is used in residential environment, this product may cause electromagnetic interference with
other instruments. In such a case, it is required to take appropriate measures for preventing such elec-
tromagnetic interference.
Export Control Compliance
This product falls into the Catch-All-Controlled Goods and/or Catch-All-Controlled Technologies (includ-
ing Programs) under Category 16 of Appended Table 1 of Export Trade Control Order or under Catego-
ry 16 of Appended Table of Foreign Exchange Control Order, based on Foreign Exchange and Foreign
Trade Act of Japan.
If you intend re-export of the product from a country other than Japan, re-sale of the product in a coun-
try other than Japan, or re-providing of the technology (including Programs), you shall observe the
regulations of your country.
Also,ifanoptionisaddedormodiedtoaddafunctiontothisproduct,thisproductmayfallunderthe
category of List-Control Goods, List-Control Technology (including Programs) under Category 1 - 15
of Appended Table 1 of Export Trade Control Order or under Category 1 - 15 of Appended Table of
Foreign Exchange Control Order, based on Foreign Exchange and Foreign Trade Act of Japan. In that
case, if you intend re-export of the product from a country other than Japan, re-sale of the product in a
country other than Japan, or re-providing of the technology (including Programs), you shall observe the
regulations of your country. Please contact Mitutoyo in advance.
Notes on Export to EU Member Countries
When you intend exporting this product to any of the EU member countries, it may be required to pro-
vide User's Manual(s) in English and EU Declaration of Conformity in English (under certain circum-
stances,User'sManual(s)inthedestinationcountry'so󰀩ciallanguageandEUDeclarationofConfor-
mityinthedestinationcountry'so󰀩ciallanguage).Fordetailedinformation,pleasecontactMitutoyoin
advance.
Disposal of Products outside the European Union and
Other European Countries
Pleasefollowtheo󰀩cialinstructionineachcommunityandcountry.

vNo. 99MBC139A
Disposal of Old Electrical & Electronic Equipment (Appli-
cable in the European Union and Other European Coun-
tries with Separate Collection Systems)
This symbol on the product or on its packaging is based on WEEE Directive (Directive on
Waste Electrical and Electronic Equipment), which is a regulation in EU member countries,
and this symbol indicates that this product shall not be treated as household waste.
Toreducetheenvironmentalimpactandminimizethevolumeoflandlls,pleasecooperatein
reuse and recycle.
For how to dispose of the product, please contact your dealer or the nearest Mitutoyo sales
o󰀩ce.
China RoHS Compliance Information
This product meets China RoHS requirements. See the table below.
产品中有害物质的名称及含量
部件名称
有害物质
铅汞镉六价铬 多溴联苯 多溴二苯醚
(Pb) (Hg) (Cd) (C r(VI)) (PBB) (PBDE)
本体 ×○○○○○
配件 ○○○○○○
本表格依据 SJ/T 11364 的规定编制。
○：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。
×：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。
环保使用期限标识是根据《电器电子产品有害物质限制使用管理办法》以及《电子电气产品有害
物质限制使用标识要求(SJ/T11364-2014)》制定的,适用于中国境内销售的电子电气产品的标识。
电器电子产品只要按照安全及使用说明内容在正常使用情况下,从生产日期算起,在此期限内产品
中含有的有毒有害物质不致发生外泄或突变,不致对环境造成严重污染或对其人身、财产造成严
重损害。
产品使用后,要废弃在环保使用年限内或者刚到年限的产品,请根据国家标准采取适当的方法进
行处置。
另外,此期限不同于质量/功能的保证期限。

vi No. 99MBC139A
Warranty
This product has been manufactured under strict quality management, but should it develop problems
within one year of the date of purchase in normal use, repair shall be performed free of charge. Please
contact the agent where you purchased the product or Mitutoyo sales representative ( “SERVICE
NETWORK” on page App-1).
If this product fails or is damaged for any of the following reasons, it will be subject to a repair charge,
even if it is still under warranty.
yFailure or damage owing to fair wear and tear
yFailure or damage owing to inappropriate handling, maintenance or repair, or to unauthorized mod-
ication
yFailure or damage owing to transport, dropping, or relocation of the product after purchase
yFailureordamageowingtore,salt,gas,abnormalvoltage,lightningsurge,ornaturaldisaster
yFailure or damage owing to use in combination with hardware or software other than those desig-
nated or permitted by Mitutoyo
yFailure or damage owing to use in ultra-hazardous activities
Thiswarrantyise󰀨ectiveonlywheretheproductisproperlyinstalledandoperatedinconformancewith
the instructions in this document within the original country of the installation.
EXCEPT AS SPECIFIED IN THIS WARRANTY, ALL EXPRESS OR IMPLIED CONDITIONS, REP-
RESENTATIONS, AND WARRANTIES OF ANY NATURE WHATSOEVER INCLUDING, WITHOUT
LIMITATION, ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE, NONINFRINGEMENT OR WARRANTY ARISING FROM A COURSE OF DEALING, US-
AGE, OR TRADE PRACTICE, ARE HEREBY EXCLUDED TO THE MAXIMUM EXTENT ALLOWED BY
APPLICABLE LAW.
You assume responsibility for all results due to the selection of this product to achieve your intended
results.
Disclaimer
IN NO EVENT WILL MITUTOYO, ITS AFFILIATED AND RELATED COMPANIES AND SUPPLIERS
BE LIABLE FOR ANY LOST REVENUE, PROFIT, OR DATA, OR FOR SPECIAL, DIRECT, INDIRECT,
CONSEQUENTIAL, INCIDENTAL, OR PUNITIVE DAMAGES HOWEVER CAUSED AND REGARD-
LESS OF THE THEORY OF LIABILITY ARISING OUT OF THE USE OF OR INABILITY TO USE THIS
PRODUCT EVEN IF MITUTOYO OR ITS AFFILIATED AND RELATED COMPANIES AND/OR SUPPLI-
ERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
If, notwithstanding the foregoing, Mitutoyo is found to be liable to you for any damage or loss which
arises out of or is in any way connected with use of this product by you, in no event shall Mitutoyo's and/
oritsa󰀩liatedandrelatedcompanies'andsuppliers'liabilitytoyou,whetherincontract,tort(including
negligence), or otherwise, exceed the price paid by you for the product only.
The foregoing limitations shall apply even if the above-stated warranty fails of its essential purpose.
BECAUSE SOME COUNTRIES, STATES OR JURISDICTIONS DO NOT ALLOW THE EXCLUSION
OR THE LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, IN SUCH
COUNTRIES, STATES OR JURISDICTIONS, MITUTOYO'S LIABILITY SHALL BE LIMITED TO THE
EXTENT PERMITTED BY LAW.

vii No. 99MBC139A
About This Document
■Positioning of this document, document map
The position of this document and its relationship to other product documentation are as follows.
●Counter manual
EJ Counter User’s Manual
(SimpliedVersion)
ThisisthesimpliedversionoftheEJCounterUser’s
Manual.
EJ Counter User’s Manual
(This Document)
Covers EJ Counter topics such as handling precautions,
operatingprocedures,specicationsandtroubleshooting.
●Interface Unit manual
Interface Unit User’s Manual
(SimpliedVersion)
ThisisthesimpliedversionoftheInterfaceUnitUser’s
Manual.
Interface Unit USB
User’s Manual
Interface Unit CC-Link
User’s Manual
Covers handling precautions, operating procedures,
specications,troubleshootingandsoforthforInterface
Unit which is connected to the EJ Counter for use.
(Not included with product. Please download the manual
from Mitutoyo website.)
●Linear Gage manual
LG100
User’s Manual
LGK
User’s Manual
LGB
User’s Manual
LG
User’s Manual
Coversinstallationprocedures,specications,mainte-
nance and so forth for Linear Gages that can be con-
nected to EJ Counters.
Select and purchase Linear Gages according to your
application.

viii No. 99MBC139A
■Intended readers and purpose of this document
●Intended readers
Thisdocumentisintendedforrst-timeusersofEJCounters.
●Purpose
The purpose of this document is to help you understand operation, functions, procedures for use and
care of the product.
■How to read this document
10 No. 99MBC139A
2 Setup
2.1.2 Linking Multiple EJ Counters
Up to eight EJ Counters can be linked together.
The optional interface units can also be linked together.
1 Attach EJ Counters to the DIN rail one at a time.
Tips
For details, see "2.1.1 DIN Rail Attachment / Removal" on page 9.
2 Remove the protective cover from the counter linkage connectors of EJ Counters to be linked
together.
NOTICE
Leave the protective covers in place on EJ Counters that are not to be linked. Leaving the connectors uncov-
ered could result in introduction of noise, accumulation of contaminants on the terminals, or damage to the
product.
3 Link EJ Counters together.
Slide the EJ Counter to be connected along the rail so that the counter linkage connector (female) is
NOTICE
Do not link more than eight EJ Counters together. Failure to observe this precaution may result in damage.
Tips
When sliding EJ Counters along the DIN rail, move them slowly.
Indicates an operating procedure to
be performed or its outline.
Indicates safety information.
Indicates supplementary informa-
tion.
Indicates reference to some other
document or section.

ix No. 99MBC139A
■Brackets, quotation marks and numbers ( 1 )
The meanings of brackets, quotation marks and numbers to be used in this document are as follows.
( ): Round brackets Represent a paraphrase of an immediately preceding phrase or a sup-
plementary explanation.
" ": Double quotation
marks
Represent a highlighted phrase. They also indicate an index where
information to be referenced is described.
[ ]: Square brackets Indicates the name of an operation key.
1
,
2
,
3 … Indicates the order and the contents of tasks.

xNo. 99MBC139A
Contents
Conventions and Wording Used in This Document …………………………………… i
Safety Precautions …………………………………………………………………………… ii
Precautions for Use…………………………………………………………………………… ii
Electromagnetic Compatibility (EMC) …………………………………………………… iv
Export Control Compliance ………………………………………………………………… iv
Notes on Export to EU Member Countries ……………………………………………… iv
Disposal of Products outside the European Union and Other European
Countries ……………………………………………………………………………………… iv
Disposal of Old Electrical & Electronic Equipment (Applicable in the European
Union and Other European Countries with Separate Collection Systems) ………… v
China RoHS Compliance Information……………………………………………………… v
Warranty ………………………………………………………………………………………… vi
Disclaimer ……………………………………………………………………………………… vi
About This Document …………………………………………………………………………vii
Contents ………………………………………………………………………………………… x
1 Overview …………………………………………………………………………………… 1
1.1 Main Functions and Features ……………………………………………………… 1
1.2 SystemConguration ……………………………………………………………… 2
1.3 Supported Linear Gages …………………………………………………………… 3
1.4 Part Names ………………………………………………………………………… 5
1.4.1 Main Unit …………………………………………………………………………………… 5
1.4.2 Display ……………………………………………………………………………………… 6
1.5 Standard Accessories ……………………………………………………………… 7
1.6 Operation Flow ……………………………………………………………………… 8
2 Setup ……………………………………………………………………………………… 9
2.1 Mounting …………………………………………………………………………… 9
2.1.1 DIN Rail Attachment / Removal …………………………………………………………… 9
2.1.2 Linking Multiple EJ Counters ………………………………………………………………10
2.1.3 Attaching the DIN Rail Fixing Bracket …………………………………………………… 11
2.2 Linear Gage Connection ……………………………………………………………12
2.3 Power Supply Connection …………………………………………………………13

xi No. 99MBC139A
2.3.1 Ground Connection …………………………………………………………………………14
2.3.2 DC Power Supply Connection ……………………………………………………………16
2.3.3 Connecting the AC Adapter (Optional) ……………………………………………………18
3 Operation Procedure ……………………………………………………………………21
3.1 Power ON/OFF ………………………………………………………………………21
3.2 Measurement Functions ……………………………………………………………22
3.2.1 Switching the Display Channel (Ch.) ………………………………………………………22
3.2.2 Preset …………………………………………………………………………………………23
3.2.3 Peak Hold ……………………………………………………………………………………25
3.2.4 Tolerance Judgment…………………………………………………………………………26
3.2.5 Setting Preset/Tolerance Values …………………………………………………………27
3.3 Parameter Setting……………………………………………………………………30
3.3.1 Setting Procedure ……………………………………………………………………………30
3.3.2 List of Parameters……………………………………………………………………………32
3.3.3 E󰀨ectofParameterChangesontheA-axisandB-axis…………………………………38
3.3.4 E󰀨ectofChangingtheDisplayMode ……………………………………………………39
4 Data Output ………………………………………………………………………………41
4.1 I/O Function …………………………………………………………………………41
4.1.1 Connector Plug ……………………………………………………………………………… 41
4.1.2 Wiring Procedure …………………………………………………………………………… 41
4.1.3 Pin Assignments ……………………………………………………………………………43
4.1.4 Input/Output Circuits…………………………………………………………………………45
4.1.5 Timing Chart …………………………………………………………………………………46
4.2 Data Input/Output ……………………………………………………………………49
5 Troubleshooting …………………………………………………………………………51
5.1 Troubleshooting………………………………………………………………………51
5.2 Error Messages………………………………………………………………………52
5.2.1 Error State Indication ………………………………………………………………………52
5.2.2 How to Clear Errors …………………………………………………………………………52
5.2.3 Error List ………………………………………………………………………………………53
6 Specications ……………………………………………………………………………55
6.1 BasicSpecications …………………………………………………………………55
6.2 Outline Dimensional Drawing ………………………………………………………56
6.3 Options ………………………………………………………………………………58
SERVICE NETWORK …………………………………………………………………… App-1

xii No. 99MBC139A

1No. 99MBC139A
1 Overview
1
1 Overview
This section describes the features and part names of the EJ Counter.
1.1 Main Functions and Features
EJ Counter is a compact display unit for use with Linear Gages.
yItcanbeconnectedtotheLinearGageswhichsupportthedi󰀨erentialsquarewaveoutput(regard-
less of whether such gages have an origin point mark).
yCompact in size, the counter is attached by DIN rails, helping to conserve space.
yA single counter can be connected to two Linear Gages. Further, up to eight EJ Counters can be
linked together, allowing connection to up to 16 Linear Gages.
yThe counter provides functions such as tolerance judgment, peak hold, and display of 2-axes sum/
di󰀨erencecalculationbetweentwoofthesameconnectedcountersI/Ooutputoftolerancejudg-
ment is also possible.
yThe counter can be connected to a PC or PLC (programmable logic controller) through the optional
interface unit, allowing output of measurement results. The interface unit also makes it possible to
make various EJ Counter settings from a PC.

2No. 99MBC139A
1 Overview
1.2 SystemConguration
Linear Gage
(Two Linear Gages can be connected to
each EJ Counter, allowing a maximum
of 16 connections.)
Interface unit
(optional)*
Free downloadable
application
LG QuickSetupTool
EJ Counter
(Up to eight units can be connected.)
PC
PLC
* Any of the following interface units can be connected.
USB Interface Unit (Part No. 21HZA149)
CC-Link Interface Unit (Part No. 21HZA186)
Tips
• For details on Linear Gages that can be connected to this product, see "1.3 Supported Linear Gages" on
page 3.
• Select and purchase Linear Gages according to your application.
• The interface unit is optional.
• PCs and/or PLCs must be provided by the customer.

3No. 99MBC139A
1 Overview
1.3 Supported Linear Gages
Linear Gages compatible with EJ Counter are as follows.
■Linear Gages with 10-pin connector
Code No. Model No. Specications
Type Resolution Stroke
542-190 LG100-110
Standard/with origin
0.001mm(1μm)
10 mm
542-191 LG100-0510 0.0005mm(0.5μm)
542-192 LG100-0110 0.0001mm(0.1μm)
542-193 LG100-125 0.001mm(1μm)
25 mm542-194 LG100-0525 0.0005mm(0.5μm)
542-195 LG100-0125 0.0001mm(0.1μm)
542-196 LG100-150 0.001mm(1μm) 50 mm
542-197 LG100-0550 0.0005mm(0.5μm)
■Linear Gages with 8-pin connector
Tips
• An optional adapter cable (Part No. 21HZA194) is required for connection.
For adapter cable external dimensions, see "6.3 Options" on page 58.
• ConnectiontoLinearGagesotherthanthoselistedbelowispossibleaslongastheysupportdi󰀨erential
square wave output (optional adapter cable required).
Code No. Model No. Specications
Type Resolution Stroke
542-164 LGF-110ZL-B
Standard/with origin
0.001mm(1μm)
10 mm
542-165 LGF-125ZL-B 25 mm
542-166 LGF-150ZL-B 50 mm
542-174 LGF-0510ZL-B
0.0005mm(0.5μm)
10 mm
542-175 LGF-0525ZL-B 25 mm
542-176 LGF-0550ZL-B 50 mm

4No. 99MBC139A
1 Overview
■Linear Gages with 6-pin connector
Tips
• An optional adapter cable (Part No. 21HZA193) is required for connection.
For adapter cable external dimensions, see "6.3 Options" on page 58.
• ConnectiontoLinearGagesotherthanthoselistedbelowispossibleaslongastheysupportdi󰀨erential
square wave output (optional adapter cable required).
• Whenusingthisproduct,pleaseusewithaDCpowernoiselter.Fordetails,see "2.3.2 DC Power Sup-
ply Connection" on page 16.
Code No. Model No. Specications
Type Resolution Stroke Notes
542-161 LGF-110L-B
Standard
0.001mm(1μm)
10 mm
542-162 LGF-125L-B 25 mm
542-163 LGF-150L-B 50 mm
542-171 LGF- 0510L-B
0.0005mm(0.5μm)
10 mm
542-172 LGF-0525L-B 25 mm
542-173 LGF-0550L-B 50 mm
542-181 LGF- 0110L- B
0.0001mm(0.1μm)
10 mm Must be connected
through a DC power
noiselter.
542-182 LGF-0125L-B 25 mm
542-156 LGK-110
Slim (ø12)
0.001mm(1μm)
10 mm542-157 LGK-0510 0.0005mm(0.5μm)
542-158 LGK- 0110 0.0001mm(0.1μm)
542-204 LGB-105L
Slim (ø8) 0.001mm(1μm)
5 mm
542-222 LGB-110
10 mm
542-222H LGB-110H High precision
542-224 LGB-110-1 Low measuring
force
542-230 LGB-110AR Air driven
542-246 LGB2-0105L
Slim
(ø9.52/8)
0.0001mm(0.1μm) 5 mm
542-244 LGB2-105L
0.001mm(1μm)
542-262 LGB2-110
10 mm
542-262H LGB2-110H High precision
542-264 LGB2-110-1 Low measuring
force
542-270 LGB2-110AR Air driven
542-312 LG -01100
Long
stroke
0.0001mm(0.1μm)
100 mm
542-316 LG -01100C Low measuring
force
542-314 LG - 01100P With rubber cap
542-332 LG-1100
0.001mm(1μm)
542-336 LG -1100C Low measuring
force
542-334 LG-1100P With rubber cap

5No. 99MBC139A
1 Overview
1.4 Part Names
1.4.1 Main Unit
①Linear Gage input con-
nector (INPUT A/B)
Display (See 1.4.2.)
⑤Connector for linking counter (female)
Serial label
Pin assignment label
⑥DIN rail attachment point
Rear side
③I/O connector
Front side (with cover)
Front side (without cover)
④Grounding terminal
②Connector for linking counter (male)
No. Name Description
①Linear Gage
input connector
(INPUT A/B)
Linear Gages can be connected to each of inputs A and B.
The Linear Gage connected to INPUT A is referred to as the
A-axis, and that connected to INPUT B as the B-axis.
②Connector for linking
counter (male)
Allows connection to another EJ Counter or optional interface
unit.
③I/O connector For connection to the power supply or external equipment using
the provided connector plug.
④Grounding terminal For connection to ground using the provided ground lead and
ground plate.
⑤Connector for linking
counter (female)
Allows connection to another EJ Counter or terminal resistance
unit.
Tips
A terminal resistance unit is provided with the optional interface unit.
⑥DIN rail attachment point Used for attaching the counter to a DIN rail.

6No. 99MBC139A
1 Overview
1.4.2 Display
MODE
Fn
SEL / CE
Ch. TIR
P.SET
MAXMIN
in21
①
③
②
⑥⑤ ⑦ ⑧ ⑨
④
■Operation key
No. Name Description
①[SEL/CE] key Used for switching channels and moving between items when
making various settings.
Cancels errors when pressed together with the [Fn] key.
Tips
For details about the A-axis, B-axis and channels, see
"■Advancedparameters"onpage34.
②[MODE] (>) key Used for peak mode selection and for moving between digits
when making various settings. When pressed together with the
[Fn] key, enters the parameter setting screen.
③[P.SET] (^) key Used for setting preset values.
Clears preset or peak values when pressed together with the [Fn]
key. When setting preset / tolerance or parameter values, increas-
es the value of the selected digit.
④[Fn] key Used to start and end setting of preset/tolerance values.
■Numeric and indicator display screen
No. Name Description
⑤Numeric display Displays numeric values.
⑥Displays the channel
(Ch.).
The selected channel (Ch.) lights.
Content of individual channel (Ch.) display varies according to the
setting of Parameter Number 03.
Tips
For details about Parameter Number 03, see
"■Advancedparameters"onpage34.
⑦Unit display
(EJ-102NE only)
The LED lights when display in inches is selected. The LED goes
out when display in mm is selected.
⑧Tolerance indicator Indicates the result of tolerance judgment.
is displayed when an error occurs.
Tips
For details about the tolerance judgment display, see "3.2.4 Toler-
ance Judgment" on page 26.
⑨Peak indicators TheLEDsgoonoro󰀨accordingtothepeakmodeselected.
Wheno󰀨:Thecurrentvalueisdisplayed.
When only MAX is lit: The maximum value is displayed.
When only MIN is lit: The minimum value is displayed.
When both MAX and MIN are lit: The run-out width (maximum
value - minimum value) is displayed.