Omron K3MA-F DATASHEET
Frequency/Rate Meter
K3MA-F
Highly Visible LCD Display with 2-color (Red
and Green) LEDs
• Contact, NPN, PNP, or voltage pulse input.
• Front-panel key operation for easy setting.
• Average processing function suppresses flicker.
• Includes scaling, auto-zero time, startup compensation time
functions.
• Easy confirmation of max/min display.
• Short 80-mm depth (measured from edge of face plate).
• Finger protective cover (standard equipment) guards against
electric shock.
• Water- and dust-proof NEMA4X (IP66 equivalent) front panel.
• Recognized to U.S. and Canadian requirements under the
Component Recognition Program of UL.
• CE marking.
Model Number Structure
■ Model Number Legend
:
K3MA-F-@
1 2 3
1. Input Type
F: Rotary pulse
2. Output Type
None: No output
A2: 2 relay contact outputs (SPST-NO)
3. Supply Voltage
100-240VAC: 100 to 240 VAC
24VAC/VDC: 24 VAC/VDC
Ordering Information
■ List of Models
Input type Supply voltage Output Model
Rotary pulse 100 to 240 VAC None K3MA-F 100-240VAC
2 relay contact outputs (SPST-NO) K3MA-F-A2 100-240VAC
24 VAC/VDC None K3MA-F 24VAC/VDC
2 relay contact outputs (SPST-NO) K3MA-F-A2 24VAC/VDC
■ Accessories (Order Separately)
Name Shape Model
Splash-proof Soft Cover K32-49SC
Hard Cover K32-49HC
Frequency/Rate Meter K3MA-F 1
Specifications
■ Ratings
Model K3MA-F 100-240VDC, K3MA-F-A2 100-240VAC K3MA-F 24VAC/VDC, K3MA-F-A2 24VAC/VDC
Supply voltage 100 to 240 VAC 24 VAC/VDC
Operating voltage range 85% to 110% of the rated supply voltage
Power consumption
(under maximum load)
Insulation resistance 20 M
Dielectric strength 2,000 VAC for 1 min between external terminal and case.
Noise immunity
Vibration resistance
Shock resistance
Ambient temperature Operating:
Approved safety standards UL3121-1, conforms to EN61010-1 (Pollution degree 2/overvoltage category II)
EMC (EMI) EN61326+A1 Industry
Weight Approx. 200 g
6 VA max. 4.5 VA max. (24 VAC)
Ω min. (at 500 VDC) between external terminal and case.
Insulation provided between inputs, outputs, and power supply.
Insulation provided between inputs, outputs, and power supply.
±1,500 V on power supply terminals in normal or com-
mon mode.
±1 µs, or 100 ns for square-wave noise with 1 ns.
Vibration: 10 to 55 Hz, Acceleration: 50 m/s
5 min each in X, Y, and Z directions for 10 sweeps.
2
150 m/s
Storage:
Conforms to VDE0106/P100 (finger protection)
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
Immunity RF-interference: EN61000-4-3: 10 V/m (amplitude-modulated, 80 MHz to 1 GHz)
Electrical Fast Transient Noise: EN61000-4-4: 2 kV (power line)
Immunity Burst Noise: 1 kV line to line (I/O signal line)
Immunity Surge: EN61000-4-5: 1 kV (power line)
Immunity Conducted Disturbance: EN61000-4-6: 3 V (0.15 to 80 MHz)
Immunity Voltage Dip/Interrupting: EN61000-4-11: 0.5 cycle, 0, 180
(100 m/s2 for relay contact outputs) 3 times each on 3 axes, 6 directions.
−10°C to 55°C (with no condensation or icing)
−25°C to 65°C (with no condensation or icing)
2
4.5 W max. (24 VDC)
±480 V on power supply terminals in normal mode.
±1,500 V in common mode.
±1 µs, or 100 ns for square-wave noise with 1 ns.
8 kV air discharge
2 kV line to ground (power line)
°, 100% (rated voltage)
2 Frequency/Rate Meter K3MA-F
■ Characteristics
Input signal No-voltage contact (30 Hz max., ON/OFF pulse width: 15 ms min.)
Measuring accuracy
Measurement method Cycle measurement
Max. displayed digits 5 digits (
Display 7-segment digital display, Character height: 14.2 mm
Polarity display “
Zero display Leading zeros are not displayed.
Scaling function Programmable with front-panel key inputs (range of display:
Hold function Max hold (maximum value), Min hold (minimum value)
Hysteresis setting Programmable with front-panel key inputs (0001 to 9999).
Other functions Scaling teach function
Output Relays: 2 SPST-NO
Delay in comparative outputs 750 ms max.
Degree of protection Front panel: NEMA4X for indoor use (equivalent to IP66)
Memory protection Non-volatile memory (EEPROM) (possible to rewrite 100,000 times)
Voltage pulse (5 kHz max., ON/OFF pulse width: 90
0 to 2 V)
Open collector (5 kHz max., ON/OFF pulse width 90
Connectable Sensors
ON residual voltage: 2.5 V max.
OFF leakage current: 0.1 mA max.
Load current: Must have switching capacity of 15 mA min.
Must be able to dependably switch a load current of 5 mA max.
±0.1%FS ±1 digit (at 23±5°C)
−19999 to 99999)
−” is displayed automatically with a negative input signal.
The decimal point position can be set as desired.
Display color change (green (red), green, red (green), red)
OUT type change (upper limit, lower limit, upper/lower limit)
Average processing (simple average OFF/2/4/8 operations)
Auto-zero time
Startup compensation time
Setting change lockout
Parameter initialization
Display auto-return time
Rear case: IEC standard IP20
Terminals: IEC standard IP00 + finger protection (VDE0106/100)
µs min., ON voltage: 4.5 to 30 V/OFF voltage:
µs min.)
−19999 to 99999).
■ Measuring Ranges
No-voltage Contact/Open Collector Inputs
Input Measuring range Measuring accuracy Displayable range
No-voltage contact (30 Hz max.) with
ON/OFF pulse width of 15 ms min.
Open collector (5 kHz max.) with
ON/OFF pulse width of 90
µs min.
0.05 to 30.00 Hz
0 to 5 kHz
±0.1% FS ±1 digit max.
(at 23
±5°C)
–19999 to 99999
(with scaling function)
■ Input/Output Ratings
Relay Contact Output
Item Resistive load (cosφ = 1) Inductive load (cosφ = 0.4, L/R = 7 ms)
Rated load (UL ratings) 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 250 VAC, 150 VDC
Max. contact current 5 A (at COM terminal)
Max. switching capacity 1,250 VA, 150 W 250 VA, 30 W
Min. permissible load
(P level, reference value)
Mechanical life 5,000,000 times min. (at a switching frequency of 1,200 times/min)
Electrical life
(at an ambient temperature of 20
°C)
10 mA at 5 VDC
100,000 times min. (at a rated load switching frequency of 10 times/min)
Frequency/Rate Meter K3MA-F 3
Connections
■ Terminal Arrangement
Power
supply
External power supply
Terminal No. Name Description
-
A1
A2
-
E4 , E6
E1 , E2
B5
E5
-
E3
-
B6
■ Block Diagram
Input
12 V
+
−
Models with
comparative
output
B5
B6
OUT1
E1
E2
OUT2100- to 240-VAC type or
E3
E4
E5
E6
Output
terminals
Input
terminals
24-VAC/VDC type
(No polarity for 24-VDC
connection.)
Refer to Input Circuits on page 5.
Note:
A1
A2
40 mA
Operation power Connects the operation power supply.
Pulse input No-voltage contact/open collector input
Outputs Outputs the relay outputs.
External power supply Use as the power supply for sensors.
Input circuit
EEPROM
Microcomputer
5 V 12 V
Key
Display
Output
circuit
X
Contact output
(See note.)
Constant voltage circuit
Power supply circuit
Note: Relay output models only.
4 Frequency/Rate Meter K3MA-F
■ Input Circuits
Pulse Input
NPN, contact input
NPN
12 V
Ω
200
Ω
1 k
E4
Pulse
detection
circuit
PNP, voltage pulse input
PNP
Voltage pulse
+
− B6
E5
E6
Ω
10 k
B5
The negative pole of the sensor power
supply and COM are connected
internally.
Voltage
detection
circuit
12 V
Frequency/Rate Meter K3MA-F 5
Operation
■ Main Functions
Input Types and Ranges
Frequency range
Function Input range (setting parameters) Setting range
(setting parameter)
Pulse frequency selection
(p-fre)
Selects pulse input signal. 0.05 to 30.00 Hz (30) Displayable from
0 to 5 kHz (5k)
with scaling function.
The position of the decimal point
−19999 to 99999
can be set as desired.
Pulse Frequency Selection
Parameter Setting value Meaning
p-fre 3 0.05 to 30.00 Hz
measurement range
5k 0 to 5 kHz measure-
ment range
Note: The default value is “0 to 5 kHz (5k).”
Scaling
When the desired display value is set for a corresponding input, the value will be displayed on a line between two points determining the zero point.
Parameter Setting value Meaning Parameter Setting value Meaning
inp 0 to 99999 Input value for dsp dp %.%%%% Display four digits after decimal point
dsp -19999 to 99999 Display value for inp %%.%%% Display three digits after decimal point
%%%.%% Display two digits after decimal point
%%%%.% Display one digit after decimal point
%%%%% No decimal point
The initial value will change depending on the
Note:
pulse frequency selection.
Display value
DISPLAY
•
The decimal point can be optionally displayed.
•
When displaying the decimal point, consider the
number of digits to follow the decimal point prior to
setting the scaling display value.
•
If
is set to 30, the initial setting for the
p-fre
decimal display will be
000.00
.
INPUT
Input value
Teaching with actual values is possible.
Instead of setting by inputting with the Up Key and Shift Key, current values can be
input as scaling input values for teaching. This is useful for making settings while checking the
operation status of the K3MA-F.
6 Frequency/Rate Meter K3MA-F
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