Omron K3MA-L 100-240VAC, K3MA-L-C 100-240VAC, K3MA-L 24VAC/VDC, K3MA-L-C 24VAC/VDC User Manual

Temperature Meter K3MA-L K-45

Panel

indicators

Temperature Meter

K3MA-L

Highly Visible LCD Display with 2-color
(Red and Green) LEDs

• Wide input range - select from two types of platinum-resistance
thermometers and ten types of thermocouples.

• Front-panel key operation for easy setting.

• Average processing function suppresses flicker.

• Temperature input shift and temperature unit selection func­tions.

• Easy confirmation of max/min display.

• Short 80-mm depth (measured from edge of face plate).

• Finger protective cover (standard equipment) protects against
electric shock.

• Water- and dust-proof NEMA4X (IP66 equivalent) front panel.

• Recognized to conform to U.S. and Canadian requirements un­der the Component Recognition Program of UL.

• CE marking.

Model Number Structure

■ Model Number Legend

1. Input Type

L: Platinum-resistance thermometer or thermocouple

2. Output Type

None: No output
C: With relay contact output (SPDT)

3. Supply Voltage

100-240VAC:100 to 240 VAC
24VAC/VDC:24 VAC/VDC

Ordering Information

■ List of Models

■ Accessories (Order Separately)

12 3

K3MA-L-@

Input type Supply voltage Output Model

Platinum-resistance thermometer or
thermocouple

100 to 240 VAC None K3MA-L 100-240VAC

1 relay contact output (SPDT) K3MA-L-C 100-240VAC

24 VAC/VDC None K3MA-L 24VAC/VDC

1 relay contact output (SPDT) K3MA-L-C 24VAC/VDC

Name Shape Model

Splash-proof Soft Cover K32-49SC

Hard Cover K32-49HC

K-46 Temperature Meter K3MA-L

Specifications

■ Ratings

K3MA-L 100-240VAC, K3MA-L-C 100-240VAC K3MA-L 24VAC/VDC, K3MA-L-C 24VAC/VDC

Supply voltage 100 to 240 VAC 24 VAC (50/60 Hz), 24 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 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.

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+A1Industry

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+A1Industry
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

Temperature Meter K3MA-L K-47

Panel

indicators

■ Characteristics

Note: The indication accuracy of the K thermocouple at a temperature of −200 to 1300°C is ±2°C ±1 digit maximum.

The indication accuracy of the T and N thermocouples at a temperature of −100°C or less is ±2°C ±1 digit maximum.
The indicator accuracy of the U and L thermocouples at any temperature is ±2°C ±1 digit maximum.
The indication accuracy of the B thermocouple at a temperature of 400°C or less is unrestricted.
The indication accuracy of the R and S thermocouples at a temperature of 200°C or less is ±3°C ±1 digit maximum.

■ Measuring Ranges

Platinum-resistance Thermometer

Thermocouple

Indication accuracy (at 23±5°C)
(See note.)

Thermocouple:
(±0.5% of indication value or ±1°C, whichever greater) ±1 digit max.

Platinum-resistance thermometer:
(±0.5% of indication value or ±1°C, whichever greater) ±1 digit max.

Input Thermocouple: K, J, T, E, L, U, N, R, S, B

Platinum-resistance thermometer: JPt100, Pt100
Measurement method Double integral method
Sampling period 500 ms
Display refresh period Sampling period (sampling times multiplied by number of averaging times if average processing is se-

lected.)
Max. displayed digits 4 digits (−1999 to 9999)
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.
Input shift Input shift equivalent to the setting value supported for all points within the sensor measurement range.
Hold function Max hold (maximum value), Min hold (minimum value)
Hysteresis setting Programmable with front-panel key inputs (0001 to 9999).
Other functions Display color change (green (red), green, red (green), red)

Average processing (simple average OFF/2/4/8 operations)

Setting change lockout

Parameter initialization
Output Relay contact (SPDT)
Delay in comparative outputs 1 s 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 Pt100 JPt100

Range °C −200 to 850 −199.9 to 500.0 0.0 to 100.0 −199.9 to 500.0 0.0 to 100.0

°F −300 to 1500 −199.9 to 900.0 0.0 to 210.0 −199.9 to 900.0 0.0 to 210.0

Parameter 01234

Input K J T E L U N R S B

Range °C −200

to
1300

−20.0
to

500.0

−100
to
850

−20.0

to

400.0

−200
to
400

−199.9
to

400.0

0
to
600

−100
to
850

−200
to
400

−199.9
to

400.0

−200
to
1300

0
to
1700

0
to
1700

100
to
1800

°F −300

to
2300

0.0
to

900.0

−100
to
1500

0.0

to

750

−300
to
700

−199.9
to

700.0

0
to
1100

−100
to
1500

−300
to
700

−199.9
to

700.0

−300
to
2300

0
to
3000

0
to
3000

300
to
3200

Parameter56789101112131415161718

K-48 Temperature Meter K3MA-L

■ Input/Output Ratings

Relay Contact Output

Connections

■ Terminal Arrangement

■ Block Diagram

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 400 VAC, 150 VDC
Max. contact current 5 A (at COM terminal)
Max. switching capacity 2,000 VA, 192 W 375 VA, 30 W
Min. permissible load

(P level, reference value)

10 mA at 5 VDC

Mechanical life 20,000,000 times min. (at a switching frequency of 1,200 time/min)

Electrical life
(at an ambient temperature of 20°C)

100,000 times min. (at a rated load switching frequency of 10 time/min)

Power
supply

Output
terminals

Input
terminals

+

++

−

100- to 240-VAC type or
24-VAC/VDC type*
(No polarity for 24-VDC
connection.)

Models with
comparative
output

For thermocouple
input

For platinum­resistance
thermometer input

OUT1

A

B

B

A1

A2

E1

E2

E3

E4

E5

E6

E4

E5

E6

*Recommended DC power supply: eg. OMRON S8VS

Terminal No. Name Description

Operation power Connects the operation power supply.
Thermocouple or platinum-resistance ther-

mometer input

Connects the thermocouple or platinum-resis­tance thermometer input.

Outputs Outputs the relay outputs.

A1 A2

-

E4 E6

-

E5

-

E1 E2

,

E3

-

X

5 V 12 V

Input Input

Micro­computer

Key

Display

Output
circuit

Contact
output (See
note.)

Constant voltage circuit

Power supply circuit

EEPROM

Note: Relay output models only.

Temperature Meter K3MA-L K-49

Panel

indicators

Operation

■ Main Functions

Input Types and Ranges

Note: The initial value is “5: thermocouple K (−200 to 1300°C/−300 to 2300°F).”

Temperature Unit Selection

Either centigrade (°C) or fahrenheit (°F) can be selected as the tem­perature unit.

OUT Types (Comparative Output
Models Only)

OUT 1 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 the upper-limit set value or less than the lower-limit set value.

Parameter Setting Input type Meaning

in-t 0 Platinum-resistance

thermometer

Pt100 −200 to 850°C −300 to 1500°F
1 −199.9 to 500.0°C −1999 to 900.0°F
2 0.0 to 100.0°C 0.0 to 210.0°F
3 JPt100 −199.9 to 500.0°C −199.9 to 900.0°F
4 0.0 to 100.0°C 0.0 to 210.0°F
5 Thermocouple K −200 to 1300°C −300 to 2300°F
6 −20.0 to 500.0°C 0.0 to 900.0°F
7J−100 to 850°C −100 to 1500°F
8 −20.0 to 400.0°C 0.0 to 750.0°F
9T−200 to 400°C −300 to 700°F
10 −199.9 to 400.0°C −199.9 to 700.0°F
11 E 0 to 600°C 0 to 1100°F
12 L −100 to 850°C −100 to 1500°F
13 U −200 to 400°C −300 to 700°F
14 −199.9 to 400.0°C −199.9 to 700.0°F
15 N −200 to 1300°C −300 to 2300°F
16 R 0 to 1700°C 0 to 3000°F
17 S 0 to 1700°C 0 to 3000°F
18 B 100 to 1800°C 300 to 3200°F

Parameter Setting Meaning

d-u

cDisplay in °C.
fDisplay in °F.

Parameter Setting Meaning

out 1.t

hi Upper limit: Alarm op-

erates at upper limit.

lo Lower limit: Alarm op-

erates at lower limit.

hi-lo Upper and lower lim-

its: Alarm operates at
upper and lower lim­its.

Upper Limit (High Acting) Lower Limit (Low Acting)

OUT1 value

Measurement
value

ON

OFF

Output

OUT1 value

Hysteresis

Hysteresis

Hysteresis

Hysteresis

Upper and Lower Limits
(Outside Band Acting)

OUT1 upper-limit
value

OUT1 lower-limit
value

ON

OFF

Output

ON

OFF

Output

Measurement
value

Measurement
value