Omron K3MA-J Series User manual

CSM_K3MA-J_DS_E_11_1
1
Process Meter
K3MA-J
Highly Visible LCD Display with 2-color
(Red and Green) LEDs
• Multi-range DC voltage/current input.
• Front-panel key operation for easy setting.
• Average processing function suppresses 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 Compo-
nent Recognition Program of UL.
•CEmarking.
Model Number Structure
■Model Number Legend
1. Input Type
J: DC voltage/current
2. Comparative Output Model
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
*Changing the display color based on comparison with a reference value is not possible.
Refer to Safety Precautions for All Digital Panel
Meters.
For the most recent information on models that have been certified for
safety standards, refer to your OMRON website.
K3MA-J-@
1 2 3
Input type Supply voltage Comparative Output Model 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

K3MA-J
2
■Accessories (Order Separately)
Note: Rubber packing is provided with the Controller.
Specifications
■Ratings
Name Shape Model
Splash-proof Soft Cover K32-49SC
Hard Cover K32-49HC
Watertight Cover Y92A-49N
Rubber Packing K32-P1
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 MΩmin. (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/s2
5 min each in X, Y, and Z directions for 10 sweeps.
Shock resistance 150 m/s2(100 m/s2for 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 UL61010-1, CSA C22.2 No.61010-1-04, 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

3
K3MA-J
■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 functions 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 average)
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 MΩmin. –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
Max. contact voltage 250 VAC, 150 VDC
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 5,000,000 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)

K3MA-J
4
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 V12 V
Input Input circuit
Micro-
computer
Key
Display
Output
circuit Contact output
(See note.)
Constant voltage circuit
Power supply circuit
EEPROM
Note: Relay output models only.
−
＋
−
＋
Voltage inputCurrent input
COM
To A/D
A+B=1 MΩ
COM
To A/D
45 Ω
4
5
6
5
A
B

5
K3MA-J
Operation
■Main Functions
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 input value
DISPLAY2: Displayed value corresponding to INPUT2
INPUT1: Any input value
DISPLAY1: Displayed 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 range
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 Input 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 Input 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 followthe decimal point prior to
setting the scaling display value.
Reverse scaling, where the display value decreases as
the input value increases, is also possible.

K3MA-J
6
Convenient Functions
Scaling Teach
The parameters (inp.1, inp.2) for the K3MA-J’s initial setting level can be set using actual input values with the teaching function. After displaying
the parameters, the actual input settings can be made with the following operation.
OUT Types (Comparative Output Models Only)
OUT 1 and OUT 2 can be set to operate in one of the three following modes in accordance with the compared values:
•Upper limit (High Acting):
The output is turned ON when the measurement value is greater than its set value.
•Lower limit (Low Acting):
The output is turned ON when the measurement value is less than its set value.
•Upper and lower limits (Outside Band Acting):
An upper limit (H set value) and lower limit (L set value) can be set independently.
The output is turned ON when the measurement value is greater than upper-limit set value or less than the lower-limit set value.
The three types of output operations shown above can be combined as desired. The following are examples of possible combinations.
“T” lights to
indicate that the
parameter is
valid for teaching.
Monitor mode
Teaching mode
“T” flashes.
Normal change
“T” turns OFF.
Use to register
and shift to monitor
mode.
Use to shift to
the next parameter
without registering.
Next parameter
Upper Limit (High Acting) Lower Limit (Low Acting)
OUT1/2 value
Measurement value
ON
OFF
OutputON
OFF
OutputON
OFF
Output
OUT1/2 value
Measurement valueMeasurement value
Hysteresis
Hysteresis
Hysteresis
Hysteresis
Upper and Lower Limits
(Outside Band Acting)
OUT1/2 upper-limit value
OUT1/2 lower-limit value
Upper Limit 2-stage Output Threshold Output Combination of Upper Limit and
Upper/Lower Limits
OUT2
value
OUT1
value
OUT2
OUT1
ON
OFF
OFF
ON
OUT2
OUT1
ON
OFF
OFF
ON
OUT2
OUT1
ON
OFF
OFF
ON
Measurement
value
Measurement
value
Measurement
value
OUT2 upper-limit
value
OUT1 upper-limit
value
OUT1 lower-limit
value
OUT2 lower-limit
value
OUT2 Upper-limit
value
OUT1 value
OUT2 Lower-limit
value

7
K3MA-J
Parameter Initialization
This function returns all of the parameters to their initial values.
Use this to reset the K3MA-J after returning it to its factory-set condi-
tion.
Average Processing
Average processing stabilizes displayed values to minimize flicker by
averaging the fluctuating input signals. Average processing can be
performed for the measurement values in either of four steps (OFF, 2
times, 4 times, or 8 times).
This is useful for ignoring rapid fluctuations, e.g., eliminating spike
noise.
Hysteresis (Comparative Output
Models Only)
The hysteresis of comparative outputs can be set to prevent chatter-
ing in the output when the measurement value fluctuates finely near
the OUT value.
Zero-limit Function
The zero-limit function changes any value below the set value to
zero. This is useful when you want to change negative values to zero
rather than display them, or when you want to make the display in the
smallest part of the input range zero.
Changing the Display Color
The color of the value displayed can be set to either red or green. For
comparative output models (K3MA-J-A2), 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.
Display Auto-return Time
This function automatically returns the display to the operation level’s
current value if no keys are pressed for a preset time (called the dis-
play auto-return time).
Move-to-Protect-Level Time
The time required to shift to the protect level can be set as desired.
Forced-zero Function
It is possible to shift from a value to the zero point with one touch of
the Up Key on the front panel (for example, when adjusting reference
values).
Note: Used only for releasing the forced-zero with the Protect menu.
MAX/MIN Display
The maximum and minimum measurement (display) values from the
time the power is turned ON until the current time can be stored and
displayed. This is useful, for example, when measuring the maximum
value.
Parameter Setting value Meaning
init off ---
on Initializes all parame-
ters.
Parameter Setting value Meaning
=-lim off OFF: No zero-limit
on ON: Zero-limit
lim-p 0 to 99 0 to 99: Zero-limit value
Upper limit (high acting)
Set value
Measurement value
Hysteresis
Output
ON
OFF
Display
Zero-limit
setting value
Input
8.781
100.05
113.36
OUT1 value
OUT2 value
Green
Red
Red
UP
MAX/MIN LEVEL MODE SHIFT
Current value
MAX value
MINvalue
MAX/MIN
MAX/MIN
MAX/MIN
Max
Min
MAX/MIN LEVEL MODE SHIFT UP
MAX/MIN LEVEL MODE SHIFT UP
MAX/MIN LEVEL MODE SHIFT UP

K3MA-J
8
Nomenclature
Dimensions
Name Functions
1. Main indicator Displays current values, parameters, and set values.
2. Opera-
tion indica-
tors
1 Lit when output 1 is ON.
2 Lit when output 2 is ON.
SV Lit when a set value is being displayed or changed.
Max Lit when the main indicator is showing the MAX value.
Min Lit when the main indicator is showing the MIN value.
Z Lit during the forced-zero operation.
T Lit when the teaching function is operable. Blinks while the teaching function is operating.
3. Level indicator Displays the current level that the K3MA-J is in. (See below for details.)
4. MAX/MIN Key Used to display the MAX and MIN values when a measurement value is being displayed.
5. Level Key Used to change the level.
6. Mode Key Used to allow the main indicator to indicate parameters sequentially.
7. Shift Key Used to enable a set value to be changed. When changing a set value, this key is used to move along the digits.
8. Up Key Used to change a set value. Used to set or clear a forced-zero function when a measurement value is being displayed.
Level indicator Level
pProtect
Not lit Operation
sInitial setting
fAdvanced-function setting
2
1
MAX/MIN LEVEL MODE SHIFT UP
Max
Min
SV
Z
T
2. Operation indicators
3. Level indicator
4. MAX/MINkey
5. Level key 6. Mode key 7. Shift key
8. Up key
1. Main indicator
ABCDE
UPSHIFTMODELEVELMAX/MIN
101.2
91
96
48
1.3
12
97
85
80
44.8
45
+0.5
0
92
+0.5
0
Finger protective
cover (provided)
Main indicator
character size
Panel cut-out
7.6 mm
14.2 mm
75 min.
120 min.
The K3MA-J uses M3 terminals.
Mounting Recommended Panel Thickness
1 to 8mm.
Mount the product horizontally.

9
K3MA-J
Application Examples
Installation
1. Insert the K3MA-J into the panel cut-out hole.
2. For a waterproof installation, insert the rubber gasket onto the
body of the K3MA-J.
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-J.
■Angle of View
The K3MA is designed to provide the best visibility at the angles
shown in the following diagram.
■Watertight Cover
Y92A-49N
■Rubber Packing
K32-P1
If the rubber packing is lost or damaged, it can
be ordered using the following model number:
K32-P1.
(Depending on the operating environment, dete-
rioration, contraction, or hardening of the rubber
packing may occur and so, in order to ensure
the level of waterproofing specified in NEMA4,
periodic replacement is recommended.)
Note: Rubber packing is provided with the
Controller.
■Wiring Precautions
•Use crimp terminals.
•Tighten the terminal screws to a torque of approximately 0.5 N⋅m.
•To avoid the influence of noise, route signal lines and power lines
separately.
■Wiring
•Use the following M3 crimp terminals.
■Unit Labels (Provided)
•The unit labels are not attached to the K3MA-J. Select the desired
labels from the provided sheet.
Note: For scales and gauges, use the unit labels that are specified by
the relevant laws or regulations.
Flowrate sensorDisplaying/outputting
liquid level
Monitoringinterior
tank pressure
E8AA Pressure Sensor
4 to 20 mA
K3MA-J
Tank Discharge valve
Pump
E4PA Ultra-
sonic Dis-
placement
Sensor
4 to 20 mA
or 0 to 10 V
K3MA-J
Pump
K3MA-J
4 to 20 mA
Flowrate Sensor
m/min
mm
Pa
• Monitoring gas pressure
• Inspection instruments in food or phar-
maceutical plants
• Monitoring liquid level in cleaning tanks • Monitoring send-out flowrate
• Water processing devices, etc.• Water tanks, devices using chemicals,
etc.
10°
30°
5.8mm max.
5.8mm max.

K3MA-J
10
Operating Procedures
■Operations in Run Mode
■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, setting/clearing forced-zero function, and
setting OUT 1/2 values.
Continue
Initial setting Making initial settings of input type, scaling, output operating action,
and other parameters.
Stopped
Advanced-function setting Setting average processing, display color settings, and other ad-
vanced-function parameters.
Stopped
Setting and Releasing a
Forced Zero
Setting a Forced Zero
Any reference point can be easily set to zero.
•Press the Up Key while the measurement is
being displayed. The displayed value will be
shifted to 0 and measurement will be
continued.
•The Z indicator will light when a forced zero
has been set.
•The shifted measurement value after a forced
zero has been set will be maintained even
after power is turned OFF.
Releasing a Forced Zero
•Press the Up Key for 1 s min. to release the
forced zero. The Z indicator will turn OFF.
If forced-zero protection is turned ON in the
protect level, the Up Key cannot be used to
set a forced zero. Forced-zero protection is
ON in the default settings.
Displayed value
Forced zero input
Z indicator OFF ON
Measured value
Measured value
after setting
forced zero
Checking the Maximum and Minimum Values
The maximum and minimum values can be displayed by pressing the MAX/MIN Key while
the measurement is being displayed.
The maximum and minimum values can be reset by pressing the MIN/MAX Key for 1 s
min. when the maximum or minimum value is displayed.
Checking and Setting Comparative Set Values (for
Models with the Comparative Output Function)
Each time the Mode Key is pressed when the measurement value, maximum value, or
minimum value is displayed, the comparative values will be displayed in the following
order: OUT1 value (or OUT1 upper-limit value, OUT1 lower-limit 1), OUT 2 value (or OUT
2 upper-limit value, OUT2 lower-limit value 2).
Note: When a comparative value is displayed, it can be changed by pressing the Shift Key
and the Up Key (when key protection is OFF).
Measurement
value
MAX value MINvalue
MAX/MINKey MAX/MINKeyMAX/MINKey
Measurement
value
MAX value
MINvalue
OUT1
upper-limit
value
OUT1 value OUT2 value
OUT1
lower-limit
value
OUT2
upper-limit
value
OUT2
lower-limit
value
Mode Key Mode Key Mode Key Mode Key Mode Key