Frequency/Rate Meter
K3NR
High-speed, Intelligent Interface Modules
with Seven Operating Modes Convert Single
or Dual Input Pulses to Display Values
• 50-kHz input range and 0.006% accuracy for sophisticated
control.
• A wide selection of outputs: relay, transistor, BCD, linear, or
communications.
• Maximum/Minimum value hold, set value write protection, and
more.
• Banks with four comparative output values and four prescale
values.
• Prescale function available, which displays in units of actual
physical parameters (length, volume, etc.).
• Set value teaching, linear output range teaching, and prescale
teaching are available using actual measured values.
• Displays values in hours, minutes, and seconds in operating
mode 6.
• A startup compensation time parameter keeps the
measurement operation from sending an unnecessary output
for a preset period up to 99.9 s.
• Built-in sensor power supply (12 VDC, 80 mA).
• Compact 1/8 DIN size.
• Conforms to EMC standards, EN61010-1 (IEC61010-1).
• UL/CSA approved.
Model Number Structure
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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.
Base Units
K3NR -
Output Boards
K31 -
8
Base Units with Output Boards
K3NR -
-
1
2 3 4
5 6 7 8
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)
6
7
5
1
2
3 4
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
C1: 3 comparative relay contact outputs (H, PASS, L: SPDT)
C2: 5 comparative relay contact outputs (HH, H, L, LL: SPST-
NO; PASS: SPDT)
C5: 5 comparative relay contact outputs (HH, H, L, LL: SPST-
NC; PASS: 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)
Note:
These output types are available on Basic Models only.
Frequency/Rate Meter
K3NR
K-129
Panel
indicators
Ordering Information
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Base Unit
Input type
Supply voltage
NPN/Voltage pulse
100 to 240 VAC
K3NR-NB1A
12 to 24 VDC
K3NR-NB2A
K3NR-PB1A
PNP
100 to 240 VAC
12 to 24 VDC
K3NR-PB2A
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.
K3NR-NB1C
K3NR-NB2C
K3NR-PB1C
K3NR-PB2C
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Available Output Board Combinations
Output type
Output configuration
Output boards
Base units
Basic
Relay contact
3 outputs: H, PASS, L (SPDT)
5 outputs: HH, H, L, LL (SPST-NO), and PASS (SPDT)
5 outputs: HH, H, L, LL (SPST-NC), and PASS (SPDT)
Transistor
BCD (see note)
Linear
5 outputs (NPN open collector)
5 outputs (PNP open collector)
5-digit output (NPN open collector)
4 to 20 mA DC
1 to 5 VDC
1 mV/10 digits
0 to 5 VDC
0 to 10 VDC
Communication boards
(see note)
Combination output and
communication boards
RS-232C
RS-485
RS-422
BCD output + 5 transistor outputs (NPN open collector)
4 to 20 mA + 5 transistor outputs (NPN open collector)
1 to 5 V + 5 transistor outputs (NPN open collector)
1 mV/10 digits + 5 transistor outputs (NPN open collector)
0 to 5 VDC + 5 transistor outputs (NPN open collector)
0 to 10 VDC + 5 transistor outputs (NPN open collector)
RS-232C + 5 transistor outputs (NPN open collector)
RS-485 + 5 transistor outputs (NPN open collector)
RS-422 + 5 transistor outputs (NPN open collector)
Note:
For details, refer to the
Communication Operation Manual.
K31-C1
K31-C2
K31-C5
K31-T1
K31-T2
K31-B2
K31-L1
K31-L2
K31-L3
K31-L7
K31-L8
K31-FLK1
K31-FLK2
K31-FLK3
K31-B4
K31-L4
K31-L5
K31-L6
K31-L9
K31-L10
K31-FLK4
K31-FLK5
K31-FLK6
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Set Value
LED Display
Yes
Yes
Yes
Yes
Yes
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Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
K-130
Frequency/Rate Meter
K3NR
Specifications
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Ratings
Supply voltage
Operating voltage range
Power consumption (see note)
Sensor power supply
Insulation resistance
Dielectric strength
Noise immunity
Vibration resistance
Shock resistance
Ambient temperature
Ambient humidity
EMC
100 to 240 VAC (50/60 Hz); 12 to 24 VDC
85% to 110% of supply voltage
15 VA max. (max. AC load with all indicators lit)
10 W max. (max. DC load with all indicators lit)
80 mA at 12 VDC±10%
20 MΩ min. (at 500 VDC) between external terminal and case.
Insulation provided between inputs, outputs, and power supply.
2,000 VAC for 1 min between external terminal and case.
Insulation provided between inputs, outputs, and power supply.
±1,500
V on power supply terminals in normal or common mode
±1 µs,
100 ns for square-wave noise
with 1 ns
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
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
Operating:
Storage:
Operating:
−10°C
to 55°C (with no icing)
−20°C
to 65°C (with no icing)
25% to 85% (with no condensation)
EN61326+A1
Industry
CISPR 11 Group 1 class A: CISRP16-1/-2
CISPR 11 Group 1 class A: CISRP16-1/-2
EN61326+A1
Industry
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)
UL508, CSA22.2;
Conforms to EN61326+A1, EN61010-1 (IEC61010-1)
Conforms to VDE0106/P100 (finger protection) when the terminal cover is mounted.
Approx. 400 g
(EMI)
Emission Enclosure:
Emission AC Mains:
(EMS)
Immunity ESD:
Approved standards
Weight
Note:
A K3NR with DC supply voltage requires approximately 1 A DC as control power supply current the moment the K3NR is turned ON. Do not
forget to take this into consideration when using several K3NR units. When the K3NR is not in measuring operation (e.g., the K3NR has
been just turned ON or is operating for startup compensation time), the display will read “00000” and all outputs will be OFF.
Frequency/Rate Meter
K3NR
K-131
Panel
indicators
I
Characteristics
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.
Operating modes 1 and 6:
±0.006%rdg±1
digit
Operating modes 2 to 5:
±0.02%rdg±1
digit
Operating mode 1:
Operating mode 2:
Operating mode 3:
Operating mode 4:
Operating mode 5:
Operating mode 6:
Operating mode 7:
7-segment LED
“−” is displayed automatically with a negative input signal.
Leading zeros are not displayed.
Programming via front-panel key inputs. (0.0001 x 10
−9
to 9.9999 x 10
9
, decimal point can be set freely)
Can be set using prescale value teaching.
Max. value (peak) hold, Min. value (bottom) hold
HOLD (Process value held)
RESET (Maximum/minimum data reset, counting value reset)
BANK (Selection of one bank out of 4 banks of set values)
(Selection of one bank out of 4 banks of prescale values)
Programmable with front-panel key inputs (1 to 9999).
Variable linear output range (for models with linear outputs only) (note 1)
Remote/Local processing (available for communications output models only)
Maximum/Minimum value data reset with front panel keys
Comparative output pattern selection
Process time for averaging measured values
Startup compensation time (0.0 to 99.9 s)
Time unit display
Security
Memory power failure
Relay contact output (3 or 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)
Rotational/circumferential speed 0.0005 to 50,000 Hz
Absolute ratio
0.0005 to 50,000 Hz
Error ratio
0.0005 to 50,000 Hz
Rotational difference
0.0005 to 50,000 Hz
Flow rate ratio
0.0005 to 50,000 Hz
Passing time
0.0005 to 50,000 Hz
Pulse counting
0 to 4G count (32-bit counter)
Measuring accuracy
(at 23±5°C)
Measuring modes and
ranges
(Operating modes 1 to 6 are
for no-contact sensor
models)
Max. displayed digits
Display
Polarity display
Zero display
Prescale function
HOLD functions
(see note 2)
External control
5 digits (−19999 to 99999)
Comparative output
hysteresis setting
Other functions
Output configuration
Operating modes 1 to 6: 200 ms max.
Delay in comparative
1 ms max.
outputs (at transistor output)
Operating mode 7:
Linear output response time
Operating modes 1 to 6: 220 ms max.
Operating mode 7:
20 ms max.
Degree of protection
Front panel: NEMA4X for indoor use (equivalent to IP66)
Rear case: IEC standard IP20
Terminals: IEC standard IP00
Non-volatile memory (EEPROM) (possible to rewrite 100,000 times)
Memory protection
Note: 1.
The linear output range cannot be set when connected to a 1 mV/10-digit Linear Output Board.
2.
Not effective for operating mode 7.
K-132
Frequency/Rate Meter
K3NR
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Input/Output Ratings
Relay Contact Output
(Incorporating a G6B Relay)
Item
Rated load
Rated carry current
Max. contact voltage
Max. contact current
Max. switching capacity
Min. permissible load
(P level, reference value)
Mechanical life
Electrical life
(at an ambient temperature of 23°C)
Resistive load (cosφ = 1)
5 A at 250 VAC; 5 A at 30 VDC
5 A max. (at COM terminal)
380 VAC, 125 VDC
5 A max. (at COM terminal)
1,250 VA, 150 W
10 mA at 5 VDC
50,000,000 times min. (at a switching frequency of 18,000 times/hr)
100,000 times min. (at a rated load switching frequency of 1,800 times/hr)
375 VA, 80 W
Inductive load (cosφ = 0.4, L/R = 7 ms)
1.5 A at 250 VAC, 1.5 A at 30 VDC
Transistor Output
Rated load voltage
Max. load current
Leakage current
24 VDC max.
50 mA
100
µA
max.
BCD Output
I/O signal name
Inputs
REQUEST, HOLD, MAX, MIN, RESET
Input signal
Input current with no-voltage input
Signal level
Outputs
DATA, POLARITY, OVERFLOW,
DATA VALID, RUN
Rated load voltage
Max. load current
Leakage current
Note:
Logic method: negative logic
Item
10 mA
ON voltage: 1.5 V max.
OFF voltage: 3 V min.
24 VDC max.
10 mA
100
µA
max.
Rating
No-voltage contact input
Linear Output
Item
Resolution
Output error
Permissible load resistance
4,096
±0.5%
FS
600
Ω
max.
500
Ω
min.
±1.5%
FS
1 KΩ min.
4 to 20 mA
1 to 5 V
1 mV/10 digits (see note)
Note:
For the 1 mV/10-digit output, the output voltage changes for every 40 to 50 increment in the display value.
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Communications Specifications
Item
Transmission method
Synchronization method
Baud rate
Transmission code
Communications
Write
Read
RS-232C, RS-422
4-wire, half-duplex
Start-stop synchronization
1,200/2,400/4,800/9,600/19,200/38,400 bps
ASCII (7-bit)
Comparative set value, prescaling value, remote/local programming, reset control of maximum/mini-
mum values, and other setting mode items excluding communications conditions.
Process value, comparative set value, maximum value, minimum value, model data, error code, and
others
2-wire, half-duplex
Panel
indicators
RS-485
For details, refer to
Communication Operation Manual.
Frequency/Rate Meter
K3NR
K-133
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