Omron K3NC-NB1A, K3NC-NB2A, K3NC-PB1A, K3NC-PB2A, K3NC-NB1C User Manual

Up/Down Counting Meter K3NC C-129

Counters

Up/Down Counting Meter

K3NC

An Ideal Interface for High-speed Up/Down
Counting and Serial Communications

• 50-kHz input range for high-speed signal processing.

• A wide selection of outputs: relay, transistor, BCD, linear, or
communications.

• Prescale function available, which displays in units of actual
physical parameters (length, volume, etc.).

• Built-in sensor power supply (12 VDC, 80 mA).

• Banks with four set values and four prescale values.

• Five-stage comparative outputs available.

• Compact 1/8 DIN size.

• Conforms to EMC standards, EN61010-1 (IEC1010-1).

• UL/CSA approved.

®

Model Number Structure

■ Model Number Legend

Base Units and Output Boards can be ordered individually or as sets. Refer to the Output Board Combinations table on page 130.

1, 2. Input Sensors Codes

NB: NPN inputs/Voltage pulse inputs
PB: PNP inputs

3. Supply Voltage

1: 100 to 240 VAC
2: 12 to 24 VDC

4. Display

A: Basic
C: Set Value LED Display

5, 6, 7, 8. Output Type Codes

C2: 5 comparative relay contact outputs (OUT1, 2, 4, 5: SPST-

NO; OUT3: SPDT)

C5: 5 comparative relay contact outputs (OUT1, 2, 4, 5: SPST-

NC; OUT3: SPDT)
T1: 5 comparative transistor outputs (NPN open collector)
T2: 5 comparative transistor outputs (PNP open collector)
B2: BCD output (NPN open collector) (see note)
B4: BCD output + 5 transistor outputs (NPN open collector)
L1: Linear output (4 to 20 mA) (see note)

L2: Linear output (1 to 5 VDC) (see note)
L3: Linear output (1 mV/10 digits) (see note)
L4: Linear output, 4 to 20 mA + 5 transistor outputs (NPN open

collector)

L5: Linear output, 1 to 5 V + 5 transistor outputs (NPN open col-

lector)

L6: Linear output, 1 mV/10 digits+ 5 transistor outputs (NPN

open collector)
L7: Linear output, 0 to 5 VDC (see note)
L8: Linear output, 0 to 10 VDC (see note)
L9: Linear output, 0 to 5 VDC + 5 transistor outputs (NPN open

collector)
L10: Linear output, 0 to 10 VDC + 5 transistor outputs (NPN open

collector)
FLK1: Communication RS-232C (see note)
FLK2: Communication RS-485 (see note)
FLK3: Communication RS-422 (see note)
FLK4: RS-232C + 5 transistor outputs (NPN open collector)
FLK5: RS-485 + 5 transistor outputs (NPN open collector)
FLK6: RS-422 + 5 transistor outputs (NPN open collector)

Note: These output types are available on Basic Models only.

1234

1

2345678

5

678

K3NC -

Base Units

K3NC - -

Base Units with Output Boards

K31 -

Output Boards

C-130 Up/Down Counting Meter K3NC

Ordering Information

■ Base Unit

■ Available Output Board Combinations

Note: For details, refer to the Communication Operation Manual.

Input type NPN/Voltage pulse PNP

Supply voltage 100 to 240 VAC 12 to 24 VDC 100 to 240 VAC 12 to 24 VDC

K3NC-NB1A K3NC-NB2A K3NC-PB1A K3NC-PB2A

K3NC-NB1C K3NC-NB2C K3NC-PB1C K3NC-PB2C

Output type Output configuration Output boards Base units

Basic Set Value

LED Display

Relay contact 5 outputs: OUT1, 2, 4, 5 (SPST-NO), and OUT3 (SPDT) K31-C2 Yes Yes

5 outputs: OUT1, 2, 4, 5 (SPST-NC), and OUT3 (SPDT) K31-C5 Yes Yes

Transistor 5 outputs (NPN open collector) K31-T1 Yes Yes

5 outputs (PNP open collector) K31-T2 Yes Yes

BCD (see note) 5-digit output (NPN open collector) K31-B2 Yes ---
Linear 4 to 20 mA DC K31-L1 Yes ---

1 to 5 VDC K31-L2 Yes --­1 mV/10 digits K31-L3 Yes --­0 to 5 VDC K31-L7 Yes --­0 to 10 VDC K31-L8 Yes ---

Communication boards
(see note)

RS-232C K31-FLK1 Yes --­RS-485 K31-FLK2 Yes --­RS-422 K31-FLK3 Yes ---

Combination output and
communication boards

BCD output + 5 transistor outputs (NPN open collector) K31-B4 Yes Yes
4 to 20 mA + 5 transistor outputs (NPN open collector) K31-L4 Yes Yes
1 to 5 V + 5 transistor outputs (NPN open collector) K31-L5 Yes Yes
1 mV/10 digits + 5 transistor outputs (NPN open collector) K31-L6 Yes Yes
0 to 5 VDC + 5 transistor outputs (NPN open collector) K31-L9 Yes Yes
0 to 10 VDC + 5 transistor outputs (NPN open collector) K31-L10 Yes Yes
RS-232C + 5 transistor outputs (NPN open collector) K31-FLK4 Yes Yes
RS-485 + 5 transistor outputs (NPN open collector) K31-FLK5 Yes Yes
RS-422 + 5 transistor outputs (NPN open collector) K31-FLK6 Yes Yes

Basic Models

These models provide a present
value LED and front-panel control
keys. Can be connected to any
Output Board, or can be used for
display only without an Output
Board.

Set Value LED Models

These models provide a
present value LED, set value
LED, and front-panel control
keys. Can be connected to
Relay, Transistor, or
Combination Output Boards.

Up/Down Counting Meter K3NC C-131

Counters

Specifications

■ Ratings

Note: A K3NC with DC supply voltage requires approximately 1 A DC as control power supply current the moment the K3NC is turned ON. Do not

forget to take this into consideration when using several K3NC units. When the K3NC is not in measuring operation (e.g., the K3NC has
been just turned ON or is operating for startup compensation time), the display will read “00000” and all outputs will be OFF.

Supply voltage 100 to 240 VAC (50/60 Hz); 12 to 24 VDC
Operating voltage range 85% to 110% of supply voltage
Power consumption (see note) 15 VA max. (max. AC load with all indicators lit)

10 W max. (max. DC load with all indicators lit)

Sensor power supply 80 mA at 12 VDC±10%
Insulation resistance 20 MΩ min. (at 500 VDC) between external terminal and case.

Insulation provided between inputs, outputs, and power supply.

Dielectric strength 2,000 VAC for 1 min between external terminal and case.

Insulation provided between inputs, outputs, and power supply.

Noise immunity ±1,500 V on power supply terminals in normal or common mode ±1 µs, 100 ns for square-wave noise

with 1 ns

Vibration resistance Malfunction: 10 to 55 Hz, 0.5-mm for 10 min each in X, Y, and Z directions

Destruction: 10 to 55 Hz, 0.75-mm for 2 hrs each in X, Y, and Z directions

Shock resistance

Malfunction: 98 m/s

2

for 3 times each in X, Y, and Z directions

Destruction: 294 m/s

2

for 3 times each in X, Y, and Z directions

Ambient temperature Operating: −10°C to 55°C (with no icing)

Storage: −20°C to 65°C (with no icing)

Ambient humidity Operating: 25% to 85% (with no condensation)
EMC (EMI) EN61326+A1 Industry

Emission Enclosure: CISPR 11 Group 1 class A: CISRP16-1/-2
Emission AC Mains: CISPR 11 Group 1 class A: CISRP16-1/-2
(EMS) EN61326+A1 Industry
Immunity ESD: EN61000-4-2: 4 kV contact discharge (level 2)

8 kV air discharge (level 3)

Immunity RF-interference: EN61000-4-3: 10 V/m (amplitude-modulated,

80 MHz to 1 GHz) (level 3)
Immunity Fast Transient Noise: EN61000-4-4: 2 kV (power line) (level 3)
Immunity Burst Noise: 1 kV line to line (I/O signal line)
Immunity Surge: EN61000-4-5: 1 kV line to line

2 kV line to ground (power line)
Immunity Conducted Disturbance EN61000-4-6: 3 V (0.15 to 80 MHz) (level 2)
Immunity Voltage Dip/Interrupting EN61000-4-11: 0.5 cycles, 0, 180°, 100% (rated voltage)

Approved standards UL508, CSA22.2;

Conforms to EN61326+A1, EN61010-1 (IEC61010-1)
Conforms to VDE0106/P100 (finger protection) when the terminal cover is mounted.

Weight Approx. 400 g

C-132 Up/Down Counting Meter K3NC

■ Characteristics

■ Input/Output Ratings

Relay Contact Output

(Incorporating a G6B Relay)

Transistor Output

Input signal No-voltage contact (30 Hz max., ON/OFF pulse width: 15 ms min.)

Voltage pulse (50 kHz max., ON/OFF pulse width: 9 µs min., ON voltage: 4.5 to 30 V/OFF voltage: −30 to 2 V)
Open collector (50 kHz max., ON/OFF pulse width: 9 µs min.)

Connectable Sensors

ON residual voltage: 3 V max.
OFF leakage current: 1.5 mA max.
Load current: Must have switching capacity of 20 mA min.

Must be able to dependably switch a load current of 5 mA max.

Input mode Up/Down B (individual inputs), Up/Down C (phase difference inputs)
Output mode ALL-H/ALL-L
Max. displayed digits 5 digits (−19999 to 99999)
Display 7-segment LED
Polarity display “−” is displayed automatically with a negative input signal.
Zero display Leading zeros are not displayed.
Prescale function

Programming via front-panel key inputs. (0.0001 x 10

−9

to 9.9999 x 109, decimal point can be set freely)

Can be set using prescale value teaching.

External control RESET: 16 ms max. (external reset signal)

COMPENSATION: 16 ms max. (external compensation signal)
BANK 1, 2: 100 ms max. (bank switching time)

Up to 4 set value or prescale value banks available

Other functions Variable linear output range (for models with linear outputs only)

Remote/Local processing (available for communications output models only)
Counting value reset with front panel keys
Security
Memory power failure

Output configuration Relay contact output (5 outputs)

Transistor output (NPN and PNP open collector), BCD (NPN open collector)
Parallel BCD (NPN open collector) + transistor output (NPN open collector)
Linear output (4 to 20 mA, 1 to 5 V) + transistor output (NPN open collector)
Communication functions (RS-232C, RS-485, RS-422)
Communication functions (RS-232C, RS-485, RS-422) + transistor output (NPN open collector)

Delay in comparative
outputs

1 ms max. (at transistor output),
10 ms max. (at relay output)

Linear output response time 20 ms max.
Degree of protection Front panel: NEMA4 for indoor use (equivalent to IP66)

Rear case: IEC standard IP20
Terminals: IEC standard IP00

Memory protection Non-volatile memory (EEPROM) (possible to rewrite 100,000 times)

Item Resistive load (cosφ = 1) Inductive load (cosφ = 0.4, L/R = 7 ms)
Rated load 5 A at 250 VAC; 5 A at 30 VDC 1.5 A at 250 VAC, 1.5 A at 30 VDC
Rated carry current 5 A max. (at COM terminal)
Max. contact voltage 380 VAC, 125 VDC
Max. contact current 5 A max. (at COM terminal)
Max. switching capacity 1,250 VA, 150 W 375 VA, 80 W
Min. permissible load

(P level, reference value)

10 mA at 5 VDC

Mechanical life 50,000,000 times min. (at a switching frequency of 18,000 times/hr)
Electrical life

(at an ambient temperature of 23°C)

100,000 times min. (at a rated load switching frequency of 1,800 times/hr)

Rated load voltage

12 to 24 VDC

+10%

/

-15%

Max. load current 50 mA
Leakage current 100 µA max.

Up/Down Counting Meter K3NC C-133

Counters

BCD Output

Note: Logic method: negative logic

Linear Output

Note: For the 1 mV/10-digit output, the output voltage changes for every 40 to 50 increment in the display value.

■ Communications Specifications

For details, refer to Communication Operation Manual.

I/O signal name Item Rating

Inputs REQUEST, COMPENSATION, RESET Input signal No-voltage contact input

Input current with no-voltage input 10 mA
Signal level ON voltage: 1.5 V max.

OFF voltage: 3 V min.

Outputs DATA, POLARITY, OVERFLOW, DATA VALID,

RUN

Rated load voltage

12 to 24 VDC

+10%

/

-15%

Max. load current 10 mA
Leakage current 100 µA max.

Item 4 to 20 mA 1 to 5 V 1 mV/10 digits (see note)
Resolution 4,096
Output error ±0.5% FS ±1.5% FS
Permissible load resistance 600 Ω max. 500 Ω min. 1 KΩ min.

Item RS-232C, RS-422 RS-485
Transmission method 4-wire, half-duplex 2-wire, half-duplex
Synchronization method Start-stop synchronization
Baud rate 1,200/2,400/4,800/9,600/19,200/38,400 bps
Transmission code ASCII (7-bit)
Communications Write Comparative set value, prescaling value, remote/local programming, reset control, and other setting

mode items excluding communications conditions.

Read Process value, comparative set value, model data, error code, and others

C-134 Up/Down Counting Meter K3NC

Connections

■ Terminal Arrangement

Input Unit

18 19 20 21 22 23 24 25 26

10 11 12 13 14 15 16 17

1 2 3 4 5 6 7 8 9

Terminal Numbers

Output unit

Input unit

Output
unit

Input
unit

Note: Terminals 7 to 13 are connected internally.

Terminals 7 and 11 are mutually isolated.

+12 V

+12 V

590 Ω

590 Ω

820 Ω

820 Ω

+12 V

10

1

2

11

GND

GND

+12 V

590 Ω

820 Ω

3

GND

10 k Ω

+12 V

590 Ω

820 Ω

4

11

GND

10 k Ω

+12 V

+12 V

590 Ω

820 Ω

10

1

2

11

GND

GND

GND

590 Ω

820 Ω

External
sensor
power
supply (+)

Input A

Input B

External
sensor
power
supply (−)

Internal circuits

Voltage Pulse Inputs

Input A

Input B

Internal circuits

PNP-input Models

External
sensor
power
supply (+)

Input A

Input B

External
sensor
power
supply (−)

Internal circuits

NPN Inputs

10 1 1

1234

+12 V

INA INB

0 V

10 11

1234

INA INB GND

10 11

1234

+12V

INA INB

0 V

+12V

INA INB

0 V

10 11

1234

Contact

NPN output sensor

PNP output sensor

Contact Output Voltage Output PNP Open Collector OutputNPN Open Collector Output

(NPN Linear 2-wire Output)

Note: Connect the + side of the NPN

linear 2-wire input to terminal 1
and the − side to terminal 11.

Note: With voltage pulse input

not from a 3-wire sensor,
connect the + side to ter­minal 3 and the − side to
terminal 11.

Note: When the contact is short-

circuited, a current of approxi­mately 13 mA will flow at a volt­age of approximately 12 V.

Input resistance: 10 kΩ

Voltage pulse output sensor

Up/Down Counting Meter K3NC C-135

Counters

Output Unit

18 19 20 21 22 23 24 25 26

18 19 20 21 22 23 24 25 26

18 19 20 21 22 23 24 25 26

18 19 20 21 22 23 24 25 26

K31-C1: Relay (3 Outputs)

Outputs (5 A max. at 250 VAC)

H PASS L

K31-C2: Relay (5 Outputs)

Outputs (5 A max. at 250 VAC)

K31-C5: Relay (5 Outputs)

Outputs (5 A max. at 250 VAC)

HH PASS L

LLH

HH PASS L

H

LL

K31-T1: Transistor (NPN Open Collector)

Outputs (50 mA max. at 24 VDC)

HH H PASS L LL COM

+ −

18 19 20 21 22 23 24 25 26

18 19 20 21 22 23 24 25 26

10

0

10

1

10

2

10310

4

48

10

4

12 4812481248 1248 12

20

123456789

10 11 12 13 14 15 16 17 18 19

21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37

K31-T2: Transistor (PNP Open Collector)

Outputs (50 mA max. at 24 VDC)

HH H PASS L LL COM

K31-B2, -B4: BCD (NPN Open Collector)

(Terminals 32 to 36 are provided only on K31-B4.

Outputs (50 mA max. at 24 VDC)

HH H PASS L LL COM

COMMON

DATA OVERFLOW

DATA VALID

RUN

COMMON

REQUEST

MAX. REQ.

MIN. REQ.

HOLD

RESET

POLARITYHHH

PASSLLL

COMMON

K31-L1, L2, L3,-L4, -L5, -L6, -L7, -L8, -L9,

-

L10: Linear

(Terminals 21 to 26 are provided only on K31-L4,

-

L5, -L6, -L9, -L10.)

L1, L4: 4 to 20 mA
L2, L5: 1 to 5 V
L3, L6: 1 mV/10 digit
L7, L9: 0 to 5 VDC
L8, L10: 0 to 10 VDC

Note: With K31-L4/-L5/-L6/-L9/-L10 models, terminals

1

9

and 26 are connected internally.

SD

RD

SG

14

123456789

10 11 12 13

15 16 17 18 19 20 21 22 23 24 25

K31-FLK1: RS-232C

+ −

18 19 20 21 22 23 24 25 26

RDA

SDA

RDB

SDB

SG

6

2345

789

6

12345

789

1

K31-FLK2, -FLK5: RS-485

(Terminals 21 to 26 are provided only on K31-FLK5.)

HH H PASS L LL COM

RS-485

Terminator

ON
OFF

Outputs (50 mA max. at 24 VDC)

K31-FLK3, -FLK6: RS-422

(The right connector is provided only on K31-FLK6)

ON

OFF

K31-FLK4: RS-232C + Transistor (NPN Open Collector)

RS-232C

LL

HH

L

COM

H

PA SS

Terminator

RS-422

• D-sub 37P Connectors for BCD output (attachment)

Plug: XM2A-3701
Hood: XM2S-3711

• D-sub 25P connectors for RS-232C output (K31-FLK1) (order

separately)
Plug: XM2A-2501
Hood: XM2S-2511

• D-sub 9P connectors for RS-422 output (K31-FLK3 and K31-

FLK6) (order separately)
Plug: XM2A-0901
Hood: XM2S-0911

• D-sub 9P connectors for RS-232C output (K31-FLK4) (order

separately)
Plug: XM2D-0901
Hood: XM2D-0911

Output NPN Tr.
(50 mA max. at 24 VDC)

Output NPN Tr.
(50 mA max. at 24 VDC)

L

H

PASS

HH

9

4321

87

6

5

LL

RD

SD

SG

COM

9

4321

87

6

5

C-136 Up/Down Counting Meter K3NC

■ Block Diagram

■ Rotary Encoder Connection Example

Input circuit

Sensor A

Sensor B

GND

Control input

Frequency measurement circuit
Waveform adjustment circuit
8-bit microcomputer

Control input circuit

Power supply
for sensor

Control power
supply

Control input
circuit

Power supply
circuit

Frequency
measurement
circuit

Wavefo rm
adjustment
circuit

Voltage stabilizing
circuit

Voltage stabilizing
circuit

Voltage stabilizing
circuit

LED

Key
switch

8-bit
microcomputer

Output
circuit

Power supply for
sensor (input circuit)

0 V

Phase A

Phase B

INA/INB Counts input signals.

Accepts Up/Down (individual or phase difference) inputs.

RESET Resets the present value to zero.

No counting inputs are accepted when a RESET input is ON.
RESET is lit when a RESET input is ON.

Note: External reset minimum signal width: 16 ms

COMPENSATION Resets the present counting value to the compensation value at the rising edge of a compensation input. In the

compensation value setting parameter, it is possible to set to “Effective during incrementing and decrementing a
count” or to “Effective only during incrementing a count.”

Note: External compensation input minimum signal width: 16 ms

BANK 1, 2 Selects one of the four banks.

Bank no. Control input

Bank 1 Bank 2

1OFFOFF
2ONOFF
3OFFON
4ONON
Note: Bank switching minimum signal width: 100 ms max.

Up/Down Counting Meter K3NC C-137

Counters

Operation

■ Main Functions

Linear Output Range lset

A linear output range can be set as required. A value corresponding
to the maximum output value and that corresponding to the minimum
output value can be set.

Remote/Local Selection r-l

Select remote programming when performing all settings through the
host devices and select local programming when performing settings
through key operation.

■ BCD Output Timing Chart

A request signal from an external device (such as a Programmable Controller) is required to read BCD data.

Single Sampling Data Output

Approximately 30 ms after the REQ signal rises, a sample is taken and the DATA VALID signal is output. Read the data when the DATA VAL I D
signal is ON.
The DATA VALID signal will turn OFF in 40 ms, and then in 16 ms, the data will go OFF.

Models with a BCD output have an open collector output configuration so that wired-OR connection is possible.

Continuous Data Output

The K3NC outputs each measurement at an interval of 64 ms when
a REQ signal is ON continuously.

20 mA

4 mA

Display

Output

Lower
limit

Upper
limit

For the 4- to 20-mA
output type

40 ms

16 ms

All data "high" All data "high"Data

Approx. 30 ms

DATA

REQ.

DATA
VALID

Pulse with a width of no less than 20 ms.
(no more than 50 ms.)

(1) (2)

(3)

***

K3NC (1)

K3NC (2)

K3NC (3)

DATA

Programmable
controller

DATA (incl. POL and OVER)
and DATA VALID are wired-OR
processed.
The RUN, OUT5, OUT4,
OUT3, OUT2, and OUT1 sig­nals are always output regard­less of the status of the REQ
signal. Do not OR-wire these
signals.

REQ.
(1)

REQ.
(2)

REQ.
(3)

DATA
VALID

*The period between the DATA VALID signal and the

REQ signal should be no less than 20 ms max.

40ms

40ms

64ms 64ms

24ms

24ms

All data "high"

REQ.

DATA

Data 1 Data 2

Approx.
30 ms

DATA
VALID

C-138 Up/Down Counting Meter K3NC

Example of Connection to Programmable Controller

24 VDC

2. 1

3. 2

4. 4

5. 8

10

0

COM

240 Ω

240 Ω

240 Ω

240 Ω

+5 V

+24 V

0 V

COM
(0 V)

DC power supply*

* Recommended
power supply;
eg. OMRON S8VS

30. RESET

31. POLARITY

26. REQUEST

25. COMMON

24. RUN

1. COMMON

IN

IN

IN

IN

IN

IN

OUT

OUT

K3NC

Transistor Output Unit

Internal circuit

Internal circuit

Internal circuit

23. DATA VALID

(Polarity: +, −)

PC (SYSMAC)
DC Input Unit

Up/Down Counting Meter K3NC C-139

Counters

Example of Connection to Display Unit

V

O

SEC

2.1

3.2

4.4

5.8

10

0

240 Ω

240 Ω

240 Ω

240 Ω

+5V

V

O

D

C

B

A

DP

LE

8

V

O

D

C

B

A

DP

LE

8

V

O

D

C

B

A

DP

LE

8

10

2

K3NC

1.COMMON

23.DATA VALID

24.RUN

25.COMMON

26.REQUEST

30.RESET

31.POLARITY

10

1

Connected

(Polarity: +, −)

M7E-01D@N2 or M7E-01H@N2

M7E Digital Display Unit

C-140 Up/Down Counting Meter K3NC

■ Output Operation Timing in RUN Mode (Relay and Transistor Outputs)

The K3NC can output the results of Up/Down counting as comparative outputs.
The output mode can be set to the ALL-H mode or the ALL-L mode.

While the reset signal is ON, the counting value will return to zero.
When the compensation signal is ON, the K3NC will be in counting operation starting with the preset compensation value. Depending on the setting

conditions, the compensation value will be effective only for the incrementing operation.

■ Output Delay (Reference Value)

The following table shows the time required for a K3NC in a system to go into reverse output operation after the counting value reaches the value
preset with the K3NC, and is due to the output processing time of the K3NC, signal transmission time of the system, and the relay connected to
the K3NC.

Note: Output delay time varies with the operating environment. If the output delay time will possibly have a serious influence on your system, check

the actual output delay time before applying the K3NC to the system.

■ Input Mode and Counting Values

Note: 1. “B” must be larger than half the minimum signal width. If it is smaller, an error of ±1 count may occur.

2. Refer to the following for the meanings of the H and L characters in the above timing charts.

ALL-H ALL-L

Note: Set value 2 < compensation value < set value 3 Note: Set value 2 < compensation value < set value 3

Measured value

Set value 5

Set value 4

Set value 3

Set value 2

Set value 1

Reset

Output 5

Output 4

Output 3

Output 2

Output 1

See note

Measured value

Set value 5

Set value 4

Set value 3

Set value 2

Set value 1

Reset

Output 5

Output 4

Output 3

Output 2

Output 1

See note

If the ALL-H output mode is selected, outputs 1 to 5 will be
ON when the measured value exceeds set values 1 to 5.

Compensation
value

If the ALL-L output mode is selected, outputs 1 to 5 will be
ON when the measured value is less than set values 1 to 5.

Compensation
value

Control I/O Output or response delay time

Relay contact output 3.0 to 10.0 ms
NPN/PNP transistor output 0.1 to 0.6 ms
Reset input 12.0 to 16.0 ms
Compensation input 12.0 to 16.0 ms
Bank switch 60.0 to 100.0 ms

u-d b : Up/Down B individual input u-d c : Up/Down C phase difference input

Signal No-voltage input

H Short-circuit
L Open

INA

INB

Counting
value

INA

INB

Counting
value

Up/Down Counting Meter K3NC C-141

Counters

Nomenclature

Name Functions

1. SV display Displays the set value or parameter. Available for Set Value LED Models only.

2. PV display Displays the process value or parameter.

3. Comparative output
status indicators

Displays the status of comparative output.

4. SV display status Indicates which comparative set value is currently on the SV display.

5. ESC Key Used to return to the RUN mode from the Setting, Protect or Maintenance mode.

6. Mode Key Used to enter the Setting mode.

Used to allow the PV display to indicate set values sequentially. Available for Basic Models only.
Used to indicate set values sequentially on the SV display. Available for Set Value LED Models only.

7. Status indicator RESET: Lit when the RESET input is ON.

PROG: Lit or flashes while parameters are being set.

8. Teaching indicator Lit when the teaching function is enabled and flashes when the K3NC is in teaching operation.

9. RESET/TEACH Key The counting value is reset by pressing this key.

Teaching is available when the teaching function is enabled.

10. Up Key and Shift Key The digit being set is scrolled by pressing the Shift Key. The set value increases by one whenever the Up Key is

pressed.

OUT5

OUT4

OUT3

OUT2

OUT1

1 2 3

4 5OUT

1. SV Display

2. PV Display

4. SV Display Status

5. ESC Key

6. Mode Key

7. Status Indicators

8. Teaching Indicator

9. RESET/TEACH Key

10. Up Key and Shift Key

3. Comparative Output
Status Indicators

C-142 Up/Down Counting Meter K3NC

Engineering Data

Derating Curve for Sensor Power Supply

Max. current (mA)

Ambient temperature (°C)

Note: The derating curve shown is for standard installation.

The derating curve depends on the mounting direction.

Up/Down Counting Meter K3NC C-143

Counters

Dimensions

Note: All units are in millimeters unless otherwise indicated.

92

+0.8

−0

45

+0.8

−0

120

75

14.2

8.2

OUT5

OUT4

OUT3

OUT2

OUT1

RESET

OUT

123

45

Panel Cutouts

PV Display

Note: The K3NC uses M3.5 terminals.

A terminal cover is provided.

C-144 Up/Down Counting Meter K3NC

Precautions

!WARNING

Do not touch any of the terminals while the power is being sup­plied. Doing so may result in electric shock.

!Caution

Do not allow metal objects or conductive wire cuttings to enter the
product. Doing so may result in electric shock, fire, or malfunction.

!Caution

Do not attempt to take the product apart or touch any internal parts
while the power is being supplied. Doing so may result in electric
shock.

!Caution

Do not use the product in locations subject to flammable or explo­sive gases. Doing so may result in explosion.

!Caution

The lifetime of output relays varies greatly with the switching ca­pacity and conditions. Consider the actual operating conditions,
and use the relays within the rated load without exceeding the
number of operations specified as the rated electrical life. Using
relays beyond their rated electrical life may result in contact depos­it or burning.

!Caution

Do not use loads exceeding the rated value. Doing so may result
in damage or burning.

!Caution

Use a power supply voltage within the specified range. Not doing
so may result in damage or burning.

!Caution

Use settings that are appropriate for the control system. Discrep­ancies between the settings and the actual control conditions may
result in unexpected operation leading to damage or accidents.

!Caution

Be sure to tighten terminal screws to the specified torque.
Specified torque for M3.5 screws: 0.74 to 0.90 N·m
Loose screws may result in burning or malfunction.

■ Application Precautions

• Use a power supply voltage within the specified range. Not doing

so may result in damage or burning.

• Be sure to perform wiring correctly, verifying the terminal names.

Incorrect wiring may result in burning.

• Be sure to tighten the screws on the terminal block properly.

• Do not connect anything to unused terminals.

■ Correct Use

Long-term Use

Use all products within the specified ranges. When using inside a
control panel, ensure that the temperature around the product, rather
than the temperature around the control panel, does not exceed the
specified temperature range. Electronic products, such as this prod­uct, have a lifetime that is dependent on the lifetime of internal elec­tronic components, as opposed to the lifetime related to the number
of relay switching operations. The lifetime of these components var­ies with the temperature; the higher the temperature, the shorter the
lifetime. Therefore, the product lifetime can be extended by lowering
the internal temperature of the product.

When several Counting Meters are mounted close together (either
horizontally or vertically), the internal temperature of the Counting
Meters may rise, leading to a reduction in the lifetime. In this case,
take measures to cool the Counting Meters, such as installing fans.
Ensure, however, that the terminals are not cooled as this may lead
to incorrect measurement.

Operating Environment

Do not use the product in locations subject to temperatures or humid­ity levels above the specified ranges, or in locations subject to con­densation.

Do not use the product in locations subject to severe shocks or vibra­tions.

Separate the product from machines that generate high-frequency
noise, such as high-frequency welding machines and high-frequency
sewing machines.

Do not use the product in locations subject to dust or corrosive
gases.

Do not use the product outdoors or in locations subject to direct sun­light.

Operation

When using models with comparative outputs, if an error occurs at
the Counting Meter, comparative output may not operate correctly.
We therefore recommend that you consider providing an alarm sys­tem separately as a countermeasure.

Parameter settings that allow the functions to operate properly are
made, using the setting menu, at the factory prior to delivery. When
using the product, change the settings as required for the applica­tion.

Mounting

Recommended panel thickness is 1 to 3.2 mm.

Panel

Up/Down Counting Meter K3NC C-145

Counters

Attach the mounting bracket on the left and right sides of the Count­ing Meter as shown in the illustration above and gradually tighten
each screw evenly in turn by considering the balance of the tighten­ing force until the ratchets start slipping without being further tight­ened.

Mount the Counting Meter as horizontally as possible.

Waterproof Specifications

Products for which the degree of protection is not specified or models
with IP@0 degree of protection do not have waterproof specifications.

Noise Countermeasures

Separate the product as far as possible from machines that generate
high-frequency noise, such as high-frequency welding machines and
high-frequency sewing machines, and machines that generate
surges.

Attach surge absorbers or noise filters to noise-generating peripheral
devices (in particular, devices with inductance such as motors, trans­formers, solenoids, and magnet coils).

In order to prevent inductive noise, wire the lines connected to the
terminal block separately from power lines carrying high voltages or
large currents. Also, do not wire in parallel to, or in the same cable as
power lines. There are other methods that are effective for reducing
noise, such as running wires along ducts and using shield lines.

When using a noise filter for the power supply, check the voltage and
current and install as close to the Counting Meter as possible.

Inductive Noise Countermeasure for Input
Line

Analog Input

Temperature Input

In order to prevent the influence of induction, separate the lead wire
joining the temperature sensor and the Counting Meter from power
and load lines.

Using the product near radios, television sets, or other wireless
devices may result in reception interference.

Unit Label (Provided)

No product is shipped with the unit label attached. Select a unit label
from the sheet provided and attach it to the Counting Meter.

+

−

Line filter

Power input

Power input

Surge absorber

Signal

input

K3NC

K3NC

+

−

Two-conductor shield wire

Signal
input

Processor

C-146 Up/Down Counting Meter K3NC

Operating Procedures

■ Operation in RUN Mode

Reset

Press the RESET/TEACH Key for 1 s min. to reset the counting
value to 0. (Enabled when key protection is cleared.)

Checking the Bank Number

Press the Shift Key for 1 s min. during measurement to display
the bank number in the PV display. (The display will return to the

measurement value if there is no key operation for 5 seconds.)

Bank Selection

• Switch between the comparative set values and the prescaling val-

ues for banks 1 to 4 using the BANK 1 and BANK 2 signals.

• The relationship between the BANK 1 and BANK 2 signals and the

bank numbers is shown in the following table.

Note: If the prescale value bank is set to OFF, then the prescaling val-

ue for each bank is fixed.

Confirming and Setting Comparative Set Values

During measurement display, press the Mode Key repeatedly to display the comparative set values in the order OUT1, OUT2, OUT3, OUT4,
and OUT5. (With models that have an SV display, the comparative set values are displayed in the SV display.)

Note: When a comparative set value is displayed, it can be changed using the Up Key and Shift Key (if key protection is OFF).

RESET

/TEACH

0

RESET

/TEACH

1 s min.

Measurement

value

Bank

number

BANK 1 BANK 2 Comparat

ive set

value

Prescaling

value

1OFFOFFsU1.** ps1.**
2ONOFFsU2.** ps2.**
3OFFONsU3.** ps3.**
4ONONsU4.** ps4.**

BANK1

BANK2

COM

Measurement

value

Comparative set

value OUT1

Comparative set

value OUT2

Comparative set

value OUT3

Comparative set

value OUT4

Comparative set

value OUT5

No key operation for 5 s

No key operation for 5 s No key operation for 5 s

No key operation for 5 s No key operation for 5 s

Up/Down Counting Meter K3NC C-147

Counters

■ Setting Procedures

The K3NC has four modes: RUN mode for normal operations, Setting mode for initial parameter input, Protect mode for lock-out configuration, and
Maintenance mode for initializing set values. The parameters that are accessible on any individual K3NC will vary depending on the Output Board
installed. Refer to the K3NC Operation Manual for details.

RUN Mode: Remains in this mode under normal operation.

The process value can be monitored.
Using the front panel keys, the comparative set value can be changed and counting value reset can be performed.

Setting Mode: Used for making initial settings.

Includes settings for four menus (Set value (sUset), prescaling (pscl), setup (set up), option (opt)) and the output test.
Protect Mode: Used for locking the front key operation or parameter changes.
Maintenance Mode: Used for initializing set values.

sUset - Program set values

s.bank Select bank no. of set values
sU*.01 Enter set value OUT1 of bank 1
sU*.02 Enter set value OUT2 of bank 1
sU*.03 Enter set value OUT3 of bank 1
sU*.04 Enter set value OUT4 of bank 1
sU*.05 Enter set value OUT5 of bank 1

Note: The above is an example when the bank number is set to 1.

pscl - Display prescaling

p.bank Select bank no. of prescale values
ps*.ax Set the mantissa (X) of the prescale value
ps*.ay Set the exponent (Y) of the prescale value
decp.* Select decimal point

Note: The above is an example when the bank number is set to 1.

setup - Program input mode/input sensor/serial communications

count Specify input mode
in Select a sensor type
u-no Enter the unit no. for the host
bps Select the baud rate
len Select the word bit length
sbit Select the stop bits
prty Select the parity bits

opt - Supplementary settings related to display or control

memo Select power failure memory function
compn Set compensation value
con-p Select conditions that allow compensation input
out Select output mode
lset.h Enter the upper limit (H) of linear output range
lset.l Enter the lower limit (L) of linear output range

r-l Select the remote/local programming
test - Generating simulated input for testing the output function
prot - Program lock-out configuration

all Enable all key protection

sUset Enable set value change prohibition

reset Enable prohibition of counting value reset using the front

panel keys

secr Specify the menus to be protected against setting in the

setting mode

1 s

1 s

+

+

ESC

ESC

ESC

ESC

Power ON

RUN mode

Setting mode

Maintenance mode

Protect mode

When power is ON

C-148 Up/Down Counting Meter K3NC

■ Initial Settings ■ Parameters

0

L

L

H

H

INA

INB

0

1

2

3

2

11

2

3

0

L

L

H

H

INA

INB

0

1

2

3

2

1

2

3

H

L

K3NC

0.5 m

0

0

0

0

0

−−−

−

−

−−

−−

−

−

Measurement starts.

Relationship between Input Mode and Counting Value

NO: Voltage pulse H NC: Voltage pulse L

No-contact or voltage pulse input

Contact input

Selecting the Sensor Type

Counting
value

: Up/Down B (individual inputs)

: Up/Down C (phase difference inputs)

Note 1: The meaning of H and

L in the graphs:

Symbol

No-voltage
input

Closed

Open

Encoder

250 pulses

Power ON

Press the Mode Key for 1 s min. to move to the Setting
Mode.

Select the setup menu ( ) with the Mode Key
and set the input mode, the input type, and other settings.

If required, set a prescale value in the prescaling menu
( ).

Set comparative set values in the set value menu ( ).

Make settings in the option menu ( ) as required.

If necessary, generate simulated input for testing the output
function in output test ( ).

After completing all the settings, press the ESC Key to
return to RUN Mode.

Counting
value

2: At least 1/2 of the first

signal width is required for
B. Otherwise a counting
error of ±1 may occur.

Power ON

RUN Mode

Refer to Operation in RUN Mode.

1 s

Press the ESC Key and
Up Key for 1 s.

Setting Mode

Set value menu

1 s

Comparative
set value bank

No key operation for 5 s

Comparative
set value OUT1

Output test

(See note 1.)

(See note 1.)

(See note 1.)

(See note 1.)

(See note 1.)

Comparative
set value OUT2

Comparative
set value OUT3

Comparative
set value OUT4

Comparative
set value OUT5

No key operation for 5 s

No key operation for 5 s

No key operation for 5 s

No key operation for 5 s

No key operation for 5 s

Prescaling

The prescale function makes it possible to convert the counting value of the
K3NC into an appropriate value.
For example, the system shown in the illustration outputs 250 pulses when
the object is advanced 0.5 m. To enable the K3NC to display @@@@.@ (mm),
obtain the advanced length of the object per pulse from the following formula.
500 mm (0.5 m)/250 = 2

1. The prescale value is set by the mantissa X multiplied by the exponent Y
as follows:
Prescale value = 2.0000 x 10

0

X = 2.0000, Y = 00

2. Set the decimal point to the left of the rightmost digit.

Up/Down Counting Meter K3NC C-149

Counters

//

1200/2400/4800/

9600 /19200/38400bps

u-d b

u-d b

/u-d c

u-d c

0

/

count

count

u-d c

u-d c

−−

−

−

−

−

−

−

−

−

−

Prescale value
bank

Decimal point

Input mode

Parity bits

Input A prescale
value mantissa

Input A prescale
value exponent

Communications
unit number

Baud rate

Word bit length

Stop bits

Sensor type

Power failure
memory

Output mode

Compensation
value

7 /8bit

1/ 2 bit

· In the Setting Mode, the measurement value is reset (i.e., to

0) and outputs turn OFF.

· Depending on the output type of the model used, some
parameters (indicated in ) are not displayed (and
hence cannot be set).

· If the input mode is changed, all parameters will be reset to
their initial values. Set the input mode first.

Protect Mode

Prescaling menu

1 s

Setup menu

1 s

No key operation for 5 s

Remote/local
programming

Changing Set Values

By pressing the Shift Key while a parameter is displayed, the set value can be
changed (setting status). The PROG status indicator will flash. Change the set
value as required, and press the Mode Key to register the setting and move to
the next parameter.

Setting Status

Next parameter

If there is no key operation for 5 seconds,
the setting is registered and the parameter
is displayed again.

PROG flashes.

Change the set value using the Up
Key and the Shift Key .

Settings displayed in reverse colors are defaults.

Option menu

No key operation for 5 s

No key operation for 5 s

No key operation for 5 s

No key operation for 5 s

No key operation for 5 s

No key operation for 5 s

No key operation for 5 s

No key operation for 5 s

No key operation for 5 s

(See note 1.)

(See note 1.)

(See note 1.)

No key operation for 5 s

1 s

No key operation for 5 s

No key operation for 5 s

No key operation for 5 s

No key operation for 5 s

No key operation for 5 s

Note 1: A number in the range 1 to 4 will be displayed.

· The measurement value will be reset if the Setting Mode is
entered during measurement.

Conditions that
allow compensa­tion input

Upper limit (H)
of linear out­put range

Lower limit (L)
of linear out­put range

C-150 Up/Down Counting Meter K3NC

Note: If there is no key operation for 5 seconds, the setting is automatically registered.

prot

all

sUset

mm.rst

secr

prot

prot

all

all

sUset

sUset

mm.rst

mm.rst

secr

secr

kpon

kpon

kpoff

kpoff

Protect Mode

Press the ESC Key
and Up Key for 1 s.

• Measurement stops in Protect Mode.

• Depending on the output type of the model used, some parameters (indicated in ) are not

displayed (and hence cannot be set).

Protect menu

Press the Mode
Key for 1 s.

All key protection

Set value change

prohibition

Maximum/minimum

value reset prohibition

Menus protected

in Setting Mode

(See
note.)

Displayed only for
models with
comparative outputs.

Note: Press the Shift Key to make it

possible to set or change parameters.

Power ON

RUN Mode

Key-protection ON:
Key-protection OFF:

Menu display Parameter display Meaning of parameter Setting range Setting key

(See note.)

All key protection:
All key operations are prohibited in
RUN Mode. (If all key protection is
ON, only the key for going to Protect
Mode is enabled.)

Use the Up Key to
change the setting.

Use the Mode Key

to enable the set­ting and move to the
next parameter.

Set value change prohibition:
Changes to comparative set values
are prohibited in RUN Mode. (Dis­played only for models with compara­tive outputs.)

Reset prohibition:
Resetting the counting value using
the front panel keys is prohibited.
(Resetting by external signals is not
prohibited.)

Menus protected in Setting Mode:
Setting operations in Setting Mode
are prohibited in the way shown be­low.

Use the Up Key to
change the setting.

Use the Mode Key

to enable the set­ting and move to the

next parameter.

Setting menu Setting

012

Set value menu ×
Scaling menu ×
Setup menu ××
Option menu ×

prot

all

sUset

reset

reset

prot

prot

all

all

sUset

sUset

secr

secr

secr

Setting:

Next parameter:

Press the ESC Key
to return to the menu.

Press the Mode Key
to display the parameter.

Setting:

Next parameter:

Setting:

Next parameter:

Setting:

Next parameter:

kpon

kpon

kpoff

kpoff

Key protection ON:
Key protection OFF:

kpon kpoff

kpon kpoff

➤

➤

00 /1/

2

1 2 3

1 2 3

➤

➤

➤

Up/Down Counting Meter K3NC C-151

Counters

■ Troubleshooting

When an error occurs, error details will be displayed in the PV display. Take the appropriate countermeasures according to the error displayed.

Error display Error contents Comparative output Countermeasure

Output

status

BCD output Communications

output

Linear
output

m1.err (M1.ERR)
m2.err (M2.ERR)

Memory error OFF OFF (all outputs

in "H" status)

OFF OFF Reset the power. If the same error

occurs, repair is necessary.

m3.err (M3.ERR) OFF OFF (all outputs

in "H" status)

OFF OFF Reset the power while holding

down the ESC Key, the Up Key, and
the RESET/TEACH Key. The set­tings will be returned to their initial
values. Redo the settings. If the
same error occurs, repair is neces­sary.

err-o (ERR-O)
chg-o (CHG-O)

Output error OFF OFF (all outputs

in "H" status)

OFF OFF

(minimum
value)

Reset the power. If the same error
occurs, repair is necessary. If nor­mal operation is restored, it is pos­sible that the original error was
caused by the influence of noise.
Check that there are no sources of
noise in the vicinity.

(Display value
flashes.)

The input range and
display range were
exceeded.

Continues Continues

The OVER signal
turns ON.

Continues
The OVER or UN-

DER signal turns
ON.

Continues Take steps to ensure that the input

values and display values are with­in the allowable ranges.

rmt (RMT)
(Flashes for 3 s.)

The remote/local
section is set to re­mote.

Continues Continues Continues Continues If an attempt to change a setting

using key operations is made with
the remote/local selection set to re­mote, this error will flash for 3 s. To
enable settings to be changed, set
the remote/local selection to local.

C-152 Up/Down Counting Meter K3NC

In the interest of product improvement, specifications are subject to change without notice.

ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.

Cat. No. N089-E1-02