Omron K3MA-J 100-240VAC, K3MA-J-A2 100-240VAC, K3MA-J 24VAC/VDC, K3MA-J-A2 24VAC/VDC User Manual
Process Meter K3MA-J 1
Process Meter
K3MA-J
Highly Visib le LC D D is play with 2-color (Re d
and Green) LEDs
• Multi-range DC voltage/current input.
• Front-panel key operation for easy setting.
• Ave ra ge proc es si ng functi on su ppre ss es flicker .
• Scaling, front-panel forced-zero, zero-limit 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 Lege nd
1. Input Type
J: DC voltage/current
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
■Accessories (Order Separately)
K3MA-J-@
1 2 3
Input type Supply voltage Output Model
DC voltage/current 100 to 240 VAC None K3MA-J 100-240VAC
2 relay contact outputs (SPST-NO) K3MA-J-A2 100-240VAC
24 VAC/VDC None K3MA-J 24VAC/VDC
2 relay contact outputs (SPST-NO) K3MA-J-A2 24VAC/VDC
Name Shape Model
Splash-proof Soft Cover K32-49SC
Hard Cover K32-49HC
2 Process Meter K3MA-J
Specifications
■Ratings
Model K3MA-J 100-240VAC, K3MA-J-A2 100-240VAC K3MA-J 24VAC/ VDC, K3MA-J-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)
6 VA max. 4.5 VA max. (24 VAC)
4.5 W max. (24 VDC)
Insulation resistance 20 M
Ω 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 com-
mon mode.
±1 µs, or 100 ns for square-wave noise with 1 ns.
±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.
Vibration resistance
Vibration: 10 to 55 Hz, Acceleration: 50 m/s
2
5 min each in X, Y , and Z directions for 10 sweeps.
Shock resistance
150 m/s
2
(100 m/s2 for relay contact outputs) 3 times each on 3 axes, 6 directions.
Ambient temperature Operating:
−10°C to 55°C (with no condensation or icing)
Storage:
−25°C to 65°C (with no condensation or icing)
Ambient humidity Operating: 25% to 85% (with no condensation)
Approved safety standards UL3121-1, conforms to EN61010-1 (Pollution degree 2/overvoltage category II)
Conforms to VDE0106/P100 (finger protection)
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
8 kV air 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)
2 kV line to ground (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% (rated voltage)
Weight Approx. 200 g
Process Meter K3MA-J 3
■Characteristics
■Measuring Ranges
Process Voltage/Current Inputs
■Input/Output Ratings
Relay Contact Output
Input signal DC voltage/current (0 to 20 mA, 4 to 20 mA, 0 to 5 V, 1 to 5 V, ±5 V, ±10 V)
A/D conversion Double integral method
Sampling period 250 ms
Display refresh period Sampling period (sampling times multiplied by number of measurements for averaging if average pro-
cessing is selected.)
Max. displayed digits 5 digits (
−19999 to 99999)
Display 7-segment digital display, Character height: 14.2 mm
Polarity display “
−” is displayed automatically with a negative input signal.
Zero display Leading zeros are not displayed.
Scaling function Programmable with front-panel key inputs (range of display:
−19999 to 99999). The decimal point po-
sition can be set as desired.
Hold function Max. hold (maximum value), Min. hold (minimum value)
Hysteresis setting Programmable with front-panel key inputs (0001 to 9999).
Other func tions Forced-zero (with front-panel key)
Zero-limit
Scaling teach function
Display color change (green (red), green, red (green), red)
OUT type change (upper limit, lower limit, upper/lower limit)
Average processing (simple aver age)
Output Relays: 2 SPST-NO
Delay in comparative outputs 750 ms max.
Degree of protection Front panel: NEMA4X for indoor use (equivalent to IP66)
Rear case: IEC standard IP20
Terminals: IEC standard IP00 + finger protection (VDE0106/100)
Memory protection Non-volatile memory (EEPROM) (possible to rewrite 100,000 times)
Input Measuring range Measuring accuracy Input impedance Displayable range
DC voltage 1.000 to 5.000 V
±0.1% FS ±1 digit max.
(at 23
±3°C)
1 M
Ω min. –19999 to 99999
(with scaling function)
0.000 to 5.000 V
–5.000 to 5.000 V
±0.1% FS ±1 digit max.
(at 23
±5°C)
–10.00 to 10.00 V
DC current 4.00 to 20.00 mA/
0.00 to 20.00 mA
±0.1% FS ±1 digit max.
(at 23
±3°C)
45
Ω
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)
10 mA at 5 VDC
Mechanical life 5,000,00 0 times min. (at a switching frequency of 1,200 times/min)
Electrical life
(at an ambient temperature of 20
°C)
100,000 times min. (at a rated load switching frequency of 10 times/min)
4 Process Meter K3MA-J
Connections
■Terminal Arrangement
■Block Diagram
■Input Circuits
Analog Input (DC Voltage/Current)
Power
supply
Output
terminals
Input
terminals
A1
A2
E1
E2
E3
E4
E5
E6
E4
E5
E6
100- to 240-VAC
type or 24-VAC/
VDC type
(No polarity for
24-VDC
connection.)
Models with
comparative
output
Voltage input
For voltage input For current input
OUT1
OUT2
COM
COM
Current input
Terminal No. Name Description
Operation power Connects the operation power supply.
Analog input Connects the voltage or current analog input.
Outputs Outputs the relay outputs.
A1 A2
-
E4 E6
,
E5
-
E1 E2
,
E3
-
X
5 V 12 V
Input Input circuit
Microcomputer
Key
Display
Output
circuit
Contact output
(See note.)
Constant voltage circuit
Power supply circuit
EEPROM
Note: Relay output models only.
45 Ω
4
5
6
5
A
B
Voltage input Current input
COM
To A/D
A+B=1 MΩ
COM
To A/D
Process Meter K3MA-J 5
Operation
■Main Funct ions
Input Types and Ranges
Note: The initial value for the input range is “4 to 20 mA (4-20).”
Scaling
• Analog (Process) Inputs
The K3MA-J converts input signals into desired physical values.
INPUT2: Any inp u t valu e
DISPLAY2: Dis played value corresponding to INPUT2
INPUT1: Any inp u t valu e
DISPLAY1: Dis played value corresponding to INPUT1
When DISPLAY1 is set for INPUT1, and DISPLAY2 is set for INPUT2, a line will be displayed joining the two points. (Raise shift, reverse scaling,
plus/minus display, etc., can be adjusted as desired.)
Input type (setting parameter) Function Input range
(setting parameters)
Setting ra nge
Input range (in-t) Selects DC voltage/current signal
input
0 to 20 mA (0-20) Displayable from
−19999 to 99999
with scaling function.
The position of the decimal point
can be set as desired.
4 to 20 mA (4-20)
0 to 5 V (0-5)
1 to 5 V (1-5)
±5 V (5)
±10 V (10)
Parameter Setting value Meaning Parameter Setting value Meaning
inp.1 -19999 to 99999 Input value for dsp.1 dp %.%%%% Display four digits after decimal point
dsp.1 -19999 to 99999 Display value for inp.1 %%.%%% Display three digits after decimal point
inp.2 -19999 to 99999 Input value for dsp.2 %%%.%% Display two digits after decimal point
dsp.2 -19999 to 99999 Display value for inp.2 %%%%.% Display one digit after decimal point
%%%%% No decimal point
()()
()
(
)
()
()
()
(
)
Reverse scaling also possible.
Input value
Input value
Display value Display value
DISPLAY 2
DISPLAY 1
DISPLAY 1
DISPLAY 2
INPUT 1
INPUT 2
INPUT 1 INPUT 2
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-J.
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.
Reverse scaling, where the display value decreases as
the input value increases, is also possible.
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