Omron K3NC User manual

Cat.No. N95–E1–1
Up/Down Counting Meter
K3NC
OPERATION MANUAL

K3NC Up/Down Counting Meter
Operation Manual
Produced January 1998

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Notice:
OMRON products are manufactured for use according to proper procedures by a qualified operator
and only for the purposes described in this manual.
The following conventions are used to indicate and classify precautions in this manual. Always heed
the information provided with them. Failure to heed precautions can result in injury to people or dam-
age to the product.
DANGER Indicates information that, if not heeded, is likely to result in loss of life or serious injury.
WARNING Indicates information that, if not heeded, could possibly result in loss of life or serious injury.
Caution Indicates information that, if not heeded, could result in relatively serious or minor injury, dam-
age to the product, or faulty operation.
OMRON Product References
All OMRON products are capitalized in this manual. The word “Unit”is also capitalized when it refers
to an OMRON product, regardless of whether or not it appears in the proper name of the product.
The abbreviation “Ch,”which appears in some displays and on some OMRON products, often means
“word”and is abbreviated “Wd”in documentation in this sense.
The abbreviation “PC”means Programmable Controller and is not used as an abbreviation for any-
thing else.
Visual Aids
The following headings appear in the left column of the manual to help you locate different types of
information.
Note Indicates information of particular interest for efficient and convenient operation
of the product.
1, 2, 3... 1. Indicates lists of one sort or another, such as procedures, checklists, etc.
OMRON, 1998
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any
form, or by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permis-
sion of OMRON.
No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON is
constantly striving to improve its high-quality products, the information contained in this manual is subject to change
without notice. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON assumes no
responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the informa-
tion contained in this publication.

TABLE OF CONTENTS
vii
PRECAUTIONS xi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 General Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Safety Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Application Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Noise Prevention xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 1
Introduction 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1 Features 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2 Front of the Meter 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3 Rear of the Meter 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4 Modes 6.................................................................
1-5 Communications Function 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 2
Setup 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1 Mounting 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2 Input Block 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3 Output Board 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 3
Parameter Setting 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1 Overview 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-2 Setting Mode 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-3 Protect Mode 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 4
Operations in RUN Mode 63. . . . . . . . . . . . . . . . . . . . . . . . .
4-1 Displaying and Changing Setting Values 64. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-2 External Input Signals 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 5
Useful Functions 69. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-1 Teaching Function 70. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-2 Output Test 74. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-3 Maintenance Mode 75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 6
BCD Output 77. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1 Connectors 78. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2 Timing Charts 81. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 7
Troubleshooting 83. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-1 Items to Be Checked First 84. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-2 Display 84. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendices
A Specifications 85. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B List of Settings 89. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C Available Models 91. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D Available Parameters 93. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E Setting Examples 95. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TABLE OF CONTENTS
viii
Index 97. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Revision History 101. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ix
About this Manual:
This manual describes the installation and operation of the K3NC Up/Down Counting Meter and includes
the sections described below.
Please read this manual carefully and be sure you understand the information provided before attempting
to install and operate the K3NC.
Section 1 describes the functions of the K3NC. The main components are also described.
Section 2 provides instructions required for mounting and wiring the K3NC.
Section 3 provides instructions for setting the parameters of the K3NC.
Section 4 provides instructions for operating the K3NC in RUN mode.
Section 5 provides information on the teaching function, output test, and maintenance mode.
Section 6 provides information on the use of the K3NC with the BCD Output Board.
Section 7 provides information for troubleshooting the K3NC
TheAppendices provide specifications, a list of settings, a list of standard models, and a list of available
menu items.
WARNING Failure to read and understand the information provided in this manual may result in
personal injury or death, damage to the product, or product failure. Please read each
section in its entirety and be sure you understand the information provided in the section
and related sections before attempting any of the procedures or operations given.
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xi
PRECAUTIONS
This section provides precautions for using the K3NC Up/Down Counting Meter and related devices.
The information contained in this section is important for the safe and reliable application of the K3NC. You must read
this section and understand the information contained before attempting to set up or operate the K3NC.
1 General Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Safety Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Application Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Noise Prevention xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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3SectionApplication Precautions
xii
1 General Precautions
The user must operate the product according to the performance specifications
described in the operation manuals.
Before using the product under conditions which are not described in the manual
or applying the product to nuclear control systems, railroad systems, aviation
systems, vehicles, combustion systems, medical equipment, amusement ma-
chines, safety equipment, and other systems, machines, and equipment that
may have a serious influence on lives and property if used improperly, consult
your OMRON representative.
Be sure to read this manual before attempting to use the product and keep this
manual close at hand for reference during operation.
2 Safety Precautions
WARNING Never attempt to disassemble any Units while power is being supplied. Doing so
may result in serious electrical shock or electrocution.
WARNING Never touch any of the terminals while power is being supplied. Doing so may
result in serious electrical shock or electrocution.
3 Application Precautions
Observe the following precautions when using the product.
•Always use the power supply voltage specified in the specifications.
•Do not use the product in locations subject to flammable gases or combustible
objects.
•Be sure to confirm terminal names when wiring.
•Be sure to tighten the screws on the terminal blocks.
Observe the following precautions when mounting the product.
•Mount the product on level surfaces.
•Mount the product on a panel which has a thickness of 1 to 3.2 mm.
Do not mount the product in the following places.
•Locations subject to strong shock or vibration.
•Locations subject to temperature or humidity exceeding the rated levels or
where icing is liable to occur.
•Locations subject to dust.
•Locations subject to corrosive gases (particularly sulfuric gases or ammonium
gases).
•Locations subject to direct sunlight or outdoor conditions.
•Locations near devices (high-frequency welders or high-frequency sewing
machines) that produce high-frequency noise.

4SectionNoise Prevention
xiii
4 Noise Prevention
Provide the following countermeasures when using the product in an environ-
ment where the product is exposed to noise.
•Countermeasures for protecting the product against high-frequency noise or
abnormal voltages.
Line filter
Up/Down Count-
ing Meter
Power
input
Power
input
Signal
input
+++
–
Up/Down Count-
ing Meter
•Countermeasures for protecting the product against inductive noise produced
from the input line.
2-conductor shield wire
+
Up/Down Count-
ing Meter
–

1
SECTION 1
Introduction
This section describes the functions of the K3NC. The main components are also described. Refer to the remaining sections of
this manual for the operation of the K3NC and its menus in detail.
1-1 Features 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2 Front of the Meter 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3 Rear of the Meter 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4 Modes 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5 Communications Function 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2
1-1 Features
The K3NC used in combination with an incremental rotary encoder calculates
and outputs the amount of forward or reverse revolutions.
The K3NC is equipped with two input modes, for individual inputs and phase-dif-
ference inputs, and two output modes, ALL-H mode and ALL-L mode.
Refer to page 48.
BCD Output A digital data output format where every four binary bits is numerically equivalent
to one decimal digit.
Refer to Section 6 BCD Output.
Refer to the Communications Manual.
Prescaling The number of counts is converted into a value within a specified range.
Refer to the following for the relationship of the number of output counts versus
the number of input counts and the prescaling value.
Count value = Number of input counts x Prescaling value
For example, if the prescaling value is 0.01, 100 counts will be counted as a
single unit (i.e., count value = 100 x 0.01 = 1).
Bank Function Four prescaling values and four set values are stored in the banks of the K3NC
and can be selected with bank selection input.
Compensation Function The compensation signal forcibly resets the value to the preset compensation
value.
RESET Function When the RESET signal turns ON, the present counting value will be set to zero.
This function keeps the process value at the time of power failure. This function
is enabled or disabled with K3NC setting.
The K3NC is provided with a teaching function that can set an actual measured
value as a setting value without key input.
This function is useful for setting parameters while checking the operating status
of the K3NC.
The teaching function can be used to set the set and scaling values. It can be
also used to set the linear output range of the K3NC with a Linear Output Board.
Refer to 5-1 Teaching Function for details.
This function is convenient for checking a system to which the K3NC is con-
nected, especially when some inputs cannot be operated. T he K3NC simulates
an input to check the output conditions.
Refer to 5-2 Output Test for details.
Input and Output Modes
Linear Output
Communications Output
Power Failure Memory
Teaching
Output Test
Features Section 1-1

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1-2 Front of the Meter
Comparative output
status indicators PV display Status indicators
Teaching indicator
Unit of measure
SV display
(SV display models only)
RESET/TEACH Key
Shift Key
Up Key
Mode Key
Escape Key
SV display status
indicators
RESET
Five-digit (–19999 to 99999), seven-segment, 14.2-mm-high LED display with a
programmable decimal point.
The displays show the process value, operations/parameters when setting, and
error messages.
PV Display K3NC-jjjA Basic Model
RUN Mode: Displays the process values. Also displays setting values while
the SV indicator is lit. When changing a value, all digits other
than those that can be set become dimmer.
Setting Mode: Displays the menu, parameter, or setting value. When chang-
ing a value, all digits other than those that can be set become
dimmer.
K3NC-jjjC Set Value LED Display Model
RUN Mode: Displays the process values.
Setting Mode: Displays the menu and parameters.
RUN Mode: Displays setting values. When changing a value, all digits other
than those that can be set become dimmer.
Setting Mode: Displays setting values. When changing a value, all digits other
than those that can be set become dimmer.
Indicates the status of the output.
Status Indicators RESET Indicator
Lit when the RESET input signal is ON.
PROG Indicator
Lit when the setting mode menu is displayed. The indicator flashes while param-
eters are displayed.
Teaching Indicator Lit when displayed parameters can be set in teaching operation. The indicator
flashes when the process value is indicated as a setting value.
SV Display Status Indicators Indicates which set value is on the PV or SV display.
Unit of Measure Attach the appropriate label showing the unit of measure (enclosed).
Used to return from the setting, protect, or maintenance mode to the RUN mode.
This key is also used to return to the previous operation during the setting, pro-
tect, or maintenance mode.
SV Display (Setting value
LED Display Models Only)
Comparative Output Status
Indicators
Escape Key
Front of the Meter Section 1-2

4
Displays a setting value (out of OUT1, 2, 3, 4 and 5 setting values in this order) on
the PV display in RUN mode when this key is pressed. Unless another operation
key is pressed within five seconds after this key has been pressed, the display
automatically changes to the one for process values.
Process
value
OUT1 is lit.
OUT1 setting
value OUT2 setting value OUT3 setting value OUT4 setting value
OUT2 is lit. OUT3 is lit. OUT4 is lit.
No key input
for 5 seconds. No key input for 5 seconds. No key input for 5 seconds. No key input for 5 seconds.
OUT5 setting
value
OUT5 is lit.
No key input
for 5 seconds.
In the RUN mode, this button terminates the measurement process and allows
you to enter the setting mode, advancing through the menus and parameters.
Menu 1 Menu 2 Menu n
Parameter 1 Parameter 2 Parameter n
In the setting mode, this button will store changes in the non-volatile memory
while at the same time advancing the display to the next menu item.
Used to select a parameter to be displayed for setting value change.
Used to increment the current digit in the setting value by one.
The value increases in the following order:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, (–1), and (–)
Only the leftmost digit will be displayed if the value is set to “–1”or“–.”
The value will be set to 0 if this key is pressed when “9”or “–” is displayed.
Used to change the parameter displayed in setting mode.
Used to scroll the digit to the right of the presently displayed digit.
Used to set the counting value forcibly to “0”in RUN mode.
Mode Key
Up Key
Shift Key
RESET/TEACH Key
Front of the Meter Section 1-2

5
Used to select the teaching function. Refer to 5-1 Teaching Function for details.
1-3 Rear of the Meter
Terminal arrangement varies depending on the selected Output Board.
For wiring, refer to Section 2 Setup.
K3NC with Relay Output Board, K31-C2, -C5
K3NC with Transistor Output Board, K31-T1, -T2
K3NC with Linear Output Board, K31-L1, -L2, -L3, -L4, -L5, -L6, -L7, -L8, -L9, -L10
K3NC with RS-485 Output Board, K31-FLK2, -FLK5
Output Board
Input Board
K3NC with BCD Output Board, K31-B2, -B4
Output Board
Input Board
K3NC with RS-232C Output Board, K31-FLK1
Communications
Output Board
Input Board
Rear of the Meter Section 1-3

6
K3NC with RS-422 Output Board, K31-FLK3
Communications
Output Board
Terminator
Input Board
K3NC with RS232C + Transistor Output Board, K31-FLK4
K3NC with RS-422 + Transistor Output Board, K31-FLK6
Communications
Output Board
Terminator
Input Board
Transistor
Output Board
1-4 Modes The following four modes are available.
•RUN mode for normal operations (see Section 4 Operations in RUN Mode)
•Setting mode for initializing parameter input (see Section 3 Parameter Setting)
•Protect mode for lock-out configuration (see 3-1 Protect Mode)
•Maintenance mode for initialization (see 5-3-2 Initialization)
Refer to the following for the relationship among these modes and selection of
the modes.
RUN mode
Press the Mode and Shift Keys
while turning on the K3NC. Power on
Press the Escape and Up
Keys for 1 second.
Maintenance mode
RUN mode
1 second
Setting mode
Protect mode
RUN Mode K3NC is in RUN when the K3NC is turned ON.
The K3NC in this mode provides an output signal as a result of the comparison of
the measured and setting values.
Modes Section 1-4

7
The basic model in this mode usually displays the process value. The parame-
ters and setting values are displayed by pressing the Mode Key.
Refer to Section 4 Operations in RUN Mode for RUN mode in detail.
Setting Mode Values are set in the K3NC in this mode by key input or using the teaching func-
tion.
Refer to Section 3 Parameter Setting for value setting by key input and 5-1
Teaching Function for the teaching function in detail.
Protect Mode Use this mode to prohibit some operations in order to lock out the setting values.
Refer to 3-1 Protect Mode for details.
Maintenance Mode The setting values are reset to factory-set values in this mode. Refer to 5-3-2
Initialization for details.
1-5 Communications Function
The communications function of the K3NC makes it possible for the host com-
puter to perform the following operations.
•Confirmation and change of setting values. Communications conditions can-
not be changed.
•Reset of the process value
•Confirmation of model data.
Use a model with the Communications Board if the communications function is
required.
Refer to the Communications Manual for the communications function in detail.
RS-232C Use the K31-FLK1 or K31-FLK4 Output Board to use the RS-232C interface.
RS-422 Use the K31-FLK3 or K31-FLK6 Output Board to use the RS-422 interface.
RS-485 Use the K31-FLK2 or K31-FLK5 Output Board to use the RS-485 interface.
Communications Function Section 1-5

9
SECTION 2
Setup
This section provides instructions required for mounting and wiring the K3NC.
2-1 Mounting 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2 Input Block 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2-1 Terminal Arrangement 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2-2 Wiring Precautions 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2-3 Wiring 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3 Output Board 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3-1 Terminal Arrangement 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3-2 Relay Output Board 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3-3 Transistor and Combination Output Board 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3-4 Linear Output Board 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3-5 BCD Output Board 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10
2-1 Mounting
Dimensions All dimensions are in millimeters.
14.2 mm
8.2 mm
PV LED Indicator Size
Panel Cutouts
45 +0.8
–0
92+0.8
–0
120 min.
75 min.
Recommended panel thickness is 1 to 3.2 mm.
Do not mount more than one Unit closely in the horizontal or vertical direction. Be
sure to keep the distance between adjacent Units.
Mounting Section 2-1

11
Mounting Method
Panel
1, 2, 3... 1. Insert the K3NC into the mounting hole on the panel.
2. Hook the fixture claws onto the side holes.
3. Mount a fixing metal to the right and left sides as shown above and while
keeping them in balance, alternately tighten each screw until the ratchet be-
comes idle.
2-2 Input Block
2-2-1 Terminal Arrangement
Sensor power supply
(80 mA max. at 12 VDC)
Open collector
input Voltage pulse input
100 to 240 to VAC
12 to 24 VDC
COMPENSATION
Note Voltage pulse input is available for the K3NC-NBjj-jj.
Input Block Section 2-2

12
2-2-2 Wiring Precautions
•Do not make any mistake in polarity when supply DC power to the K3NC.
•Do not wire power lines alongside the signal lines of the K3NC in order to pre-
vent the K3NC from noise interference.
•Wire the terminal block with crimp terminals.
•Tighten each screw to a torque of 0.78 N Sm (8 kgf Scm).
2-2-3 Wiring
Power Supply Apply 100 to 240 VAC or 12 to 24 VDC to terminals 8 and 9.
Open Collector Input Connect the pulse output from sensor A to terminal 1.
Connect the pulse output from sensor B to terminal 2.
Terminals 10 and 11 are exclusively used for power supply with an output of
80 mA at 12 VDC to sensors A and B. If power is supplied to the sensors A or B
from a different power source, do not use terminal 10. Do not connect a sensor
with open collector output to terminal 10.
Refer to the following for sensor connections.
Sensor (with NPN output) Sensor (with PNP output) +12 V
+12 V
•Residual voltage with sensor turned on: 3 V max.
•Current leakage with sensor turned off: 1.5 mA max.
•Switching load current: 20 mA or greater. Must be able to dependable switch
a load current of 5 mA max.
Photoelectric sensors, proximity sensors, rotary encoders, and relays can be
connected as sensors to the K3NC.
Voltage Pulse Input Connect the pulse output of sensor A to terminal 3.
Connect the pulse output of sensor B to terminal 4.
Terminals 10 and 11 are exclusively used for power supply with an output of
80 mA at 12 VDC to sensors A and B. If power is supplied to the sensors A and B
from a different power source, do not use terminal 10. Do not connect a sensor
with voltage pulse output to terminal 10.
Refer to the following for sensor connections.
Sensor +12 V
H level (sensor output ON): 4.5 to 30 VDC
L level (sensor output OFF): –30 to 2 VDC
Auxiliary Power Supply Terminals 10 and 11 are exclusively used for power supply to sensors with an
output of 80 mA at 12 VDC ±10%.
Input Block Section 2-2