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.
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 Operating voltage range 85% to 110% of the rated supply voltage Power consumption (under maximum load) 6 VA max. 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.
■ Characteristics Input signal No-voltage contact (30 Hz max., ON/OFF pulse width: 15 ms min.) Voltage pulse (5 kHz max., ON/OFF pulse width: 90 µs min., ON voltage: 4.5 to 30 V/OFF voltage: 0 to 2 V) Open collector (5 kHz max., ON/OFF pulse width 90 µs min.) 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. Measuring accuracy ±0.
Connections ■ Terminal Arrangement Models with comparative output A1 Power supply Output terminals A2 E2 OUT1 100- to 240-VAC type or 24-VAC/VDC type (No polarity for 24-VDC connection.) Input terminals E1 OUT2 E3 E4 + 12 V 40 mA External power supply − B5 E5 B6 E6 Note: Refer to Input Circuits on page 5. Terminal No. Name Description A1 - A2 Operation power Connects the operation power supply.
■ Input Circuits Pulse Input 12 V 200 Ω 1 kΩ Pulse detection circuit E4 NPN, contact input NPN E5 PNP, voltage pulse input 12 V Voltage detection circuit E6 Voltage pulse PNP 10 kΩ + B5 − B6 The negative pole of the sensor power supply and COM are connected internally.
Operation ■ Main Functions Input Types and Ranges Frequency range (setting parameter) Pulse frequency selection (p-fre) Function Input range (setting parameters) Selects pulse input signal. 0.05 to 30.00 Hz (30) 0 to 5 kHz (5k) Setting range Displayable from −19999 to 99999 with scaling function. The position of the decimal point can be set as desired. Pulse Frequency Selection Parameter p-fre Setting value Meaning 3 0.05 to 30.
Convenient Functions Scaling Teach The parameter (inp) for the K3MA-F’s initial setting level can be set using actual input values with the teaching function. After displaying the parameter, the actual input settings can be made with the following operation. Teaching mode Monitor mode “T” flashes. Use to register and shift to monitor mode. Use to shift to the next parameter without registering. Normal change “T” lights to indicate that the parameter is valid for teaching. “T” turns OFF.
Average Processing Changing the Display Color Average processing stabilizes the display by minimizing any pulsating or flicker caused by fluctuations in the pulse width of sensor input or by eccentricity in rotating shafts. The color of the value displayed can be set to either red or green. For comparative output models, the display color can be set to change from green to red, or from red to green, according to the status of the comparison criterion. Red 113.36 OUT1 value Green 100.
Nomenclature 2. Operation indicators 1 2 3. Level indicator Max Min 1. Main indicator SV T MAX/MIN LEVEL MODE SHIFT UP 4. MAX/MIN key 5. Level key 8. Up key 6. Mode key Name Functions 1. Main indicator Displays current values, parameters, and set values. 2. Opera- 1 tion indica- 2 tors SV Lit when output 1 is ON. Max 7. Shift key Lit when output 2 is ON. Lit when a set value is being displayed or changed. Lit when the main indicator is showing the MAX value.
Dimensions Terminal cover (provided) 101.2 91 Main indicator character size Panel cut-out 120 min. 14.2 mm A B C D E 85 97 7.6 mm 75 min. +0.5 92 0 12 45+0.5 0 1.3 80 96 44.8 48 MAX/MIN LEVEL MODE SHIFT The K3MA-F uses M3 terminals. A terminal cover is provided.
Installation 1. Insert the K3MA-F into the panel cut-out hole. 2. For a waterproof installation, insert the rubber gasket onto the body of the K3MA-F. Note: For scales and gauges, use the unit labels that are specified by the relevant laws or regulations. 3. Fit the adaptor into the grooves on the left and right sides of the rear case, then push it until it contacts the panel to secure the K3MA-F. ■ Wiring Precautions • Use crimp terminals. • Tighten the terminal screws to a torque of approximately 0.
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 disassemble the product or touch the internal components of the product while the power is being supplied. Doing so may result in electric shock. !Caution Do not allow metal objects or wire cuttings to enter the product. Doing so may result in electric shock, fire, or malfunction.
Operating Procedures ■ Levels “Level” refers to a grouping of parameters. The following table lists the operations that are possible in each of the levels, and the diagram tells how to move between levels. There are some parameters that are not displayed for certain models. Level name Function Measurement Protect Setting lockouts. Continue Operation Displaying current values, and setting OUT 1/2 set values.
■ Parameters Note: 1. Some parameters are not displayed for certain models. 2. The K3MA-F will stop measurement if the level is changed to the initial setting level or the advanced-function setting level. 3. If the input range is changed, some parameters are set to default values. Therefore, set the input range first. 4. Settings displayed in reversed colors are defaults. Power ON Operation level Current value For models with the comparative output function. MODE OUT1 value − MODE Set one of these.
Press Level Key for more than 3 s. Press Level Key for less than 1 s. Advanced-function setting level Initial setting level Press Level Key for less than 1 s.
Press Level Key + Mode Key for more than 1 s. Operation level Protect level Press Level Key + than preset time. Mode Key for more Operation/adjustment lockouts / / / / MODE Setting level lockouts MODE Setting change lockout / MODE Operation/Adjustment Lockouts ■ Initial Settings Restricts key operations for operation level and adjustment level.
■ Setting Example When displaying a flowrate (e.g., in l/min or l/h), make the scaling settings after confirming the I/O characteristics of the flowrate sensor. There are flowrate sensors that output analog signals. If this kind of flowrate sensor is used, consider using the K3MA-J. Initial Settings The settings for the following example are shown here. Example: Display conveyor belt feed speed E2E-X5E1 Proximity Sensor 0.
Warranty and Limitations of Liability ■ WARRANTY OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a period of one year (or other period if specified) from date of sale by OMRON. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE PRODUCTS.
Frequency/Rate Meter K3MA-F 19
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. N107-E1-03A In the interest of product improvement, specifications are subject to change without notice. OMRON Corporation Industrial Automation Company Industrial Devices and Components Division H.Q.
