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■ 

Overview and Features

By connecting the power monitor/sensor KM series (sold separately), the ZN-KMX21-

 

allows you to record the measured data of the power monitor/sensor (KM series) and set 

various operations.

● 

Display and judgment output

The display of the measured data can be switched with the 

 and 

 keys. Also, 

you can select the measurement target of the monitoring target and set the 

threshold value to output an alarm from the output terminal.

● 

Data output and viewing

Measurement values can be recorded to the unit's memory and the recorded 

measurement values can be stored into the SD card.

SD card (*): Data is in CSV format.

By using the software, the measured values recorded with multiple sensors can be 

converted into graphs and unified into one file.

* The operation has been checked with the HMC-SD291 2GB SD card 

(Recommended SD card).

■ 

Names and Functions

Display

MODE key

Item select key

(    key)
Item select key

(    key)

SET/REC/STOP key

Alarm output terminal

SD card slot

Sensor head

connector

AC adapter terminal

Mounting

screw hole

Reset switch

Screw hook hole

Function
Switches operating modes
Releases error and alarm (holding)
Cancels during settings
Moves setting items (upper direction)
Switches display screens (reverse direction)
Changes the setting value (increasing)
Moves the setting items (lower direction)
Switches the display screens (forward direction)
Changes the setting value (decreasing)
Confirms the setting value
Starts/stops record (holding)
Saves recorded data to the SD memory card.
Used to secure screws (M3x4 mm female hole)
For screw head hook
Restarts the unit.*

Name
 
MODE key

Item select key
(     key)

Item select key
(     key)

SET/REC/STOP key

Mounting screw hole
Screw hook hole
Reset switch

* Used when an SD card is not available when recording stops, or when error 

recovery cannot be made.

LAN port

■ 

Alarm Output Specifications

GND

External 

power 

supply

OUT

0V

Load

GND OUT

● 

Terminals

● 

Output Specifications

Terminal names are inscribed on the unit.

For wire used for a terminal block,consider the following.

Wire length

30m and less

(1) OUT

Judgment result allocated in THR mode is output.

(2) GND

Common terminal.

Do not directly connect the external power supply between OUT and GND.

Be sure to connect the load.

External power 

supply voltage
Load current
ON residual voltage
OFF leakage current
Internal circuit 

diagram

12 to 24 VDC

12 to 24 VDC  ±10%

45 mA max.
1.2 V max.
0.1 mA max.

■ 

Display Unit

Display

Meaning and operation when turned on

Communication with LAN cable.

Integral power consumption reset interval is set.

The setting is OFF when it is not displayed.

LAN cable is connected and network communication is possible.

Recording data into the internal memory. 

Recording start wait using timer when blinking.

Power is supplied.
Indicates the upper limit threshold value.

Indicates the maximum total momentary power value.

Indicates the minimum total momentary power value.

Indicates the average total momentary power value.

The unit is currently operating in RUN mode.

The unit is currently operating in FUN mode.

The unit is currently operating in THR mode.

SD card has been inserted.

SD card is being accessed while light blinking.
A total integrated power consumption has exceeded the specified 

upper threshold value.

■ 

7-segment Display List

■ 

Ratings

Item
Connectable Power Sensor/Monitor

Model

KM20-B40-FLK, KM50-C, KM50-E, KM100, KM-N1-FLK, KM-N2-FLK and KM-N3-FLK

ZN-KMX21-

Accessories

10 to 150 Hz, 0.7 mm double amplitude, acceleration: 50 m/s2 for each in X, Y and Z directions for 80 min

*

6

150 m/s2 in 6 directions (+/-X, +/-Y, and +/-Z directions), 3 times each

*

6

Instruction Sheet (This sheet), Startup Guide, 

Alarm Output Connector

*

7, AC Adapter

*

8, 

*

9, DC Cable

*

9, and Dedicated Connection Cable

ABS

IP30

Magnet mounting, screw mounting, hook, free standing

Approx. 500 g

Shock Resistance
Material

Degree of Protection

Mounting

Weight (in Package)

Max. Number of Connectable 

Power Sensor/Monitor Units
Display
Recording Interval
Recorded data
Operation Function
Recording Mode
External Output
Communication Interface
Memory Capacity (Internal)
Memory Capacity (External)
Power Supply
Current Consumption
Operating Temperature
Operating Humidity
Storage Humidity/Temperature
Insulation Resistance
Withstand Voltage
Vibration Resistance

7-seg. 5-digit 2-step LCD display, auxiliary information indicator displays

1 s, 2 s, 5 s, 10 s, 20 s, 30 s, 1 min.

Momentary power, Integrated power, Power factor, Sum of pulse input counts 1 and 2 

*

1

Integrated power total sum, integrated momentary power, electricity rate total sum

Continue mode

*

2, Ring mode 

*

3

Alarm output (Photocoupler output) 

*

4

Ethernet (10BASE-T, 100BASE-TX)

Internal memory: approx. 200 data items (at maximum load); approx. 6800 data items*5  (at minimum load)

SD card with SDHC compatibility (Save measured values, save and read setting values)

DC input: 24 VDC±10%, AC adapter: 100 to 240 VAC/50 to 60 Hz

80 mA max. (at 24 VDC); 70 mA max. (AC adapter used)

Without Ethernet: -10°C to 40°C (no condensation or icing) With Ethernet: 0°C to 40°C (no condensation or icing)

20 to 85%RH (no condensation or icing)

-15°C to +60°C, 20 to 85%RH (no condensation or icing)

20 M

Ω

 (500 VDC)

1000 VAC, 50/60 Hz, 1 min.

31 units

*

1: Only supported for KM50-C and KM50-E.

*

2: Automatically writes the data to the SD memory card when the internal memory reaches its capacity and continues recording until the SD card memory capacity reaches its limit. The 

unit stops operation if there is no SD memory card inserted when the internal memory reaches its capacity. (Recording can be resumed after inserting an SD memory card and 

outputting the data to it at a press of button.)

*

3: Continues the recording of the latest measured values until the internal memory reaches its capacity. (If the internal memory capacity exceeds the capacity, data is overwritten from 

the oldest one in the memory.)

*

4: Output when the integrated power upper limit specified in THR mode is exceeded.

*

5: The maximum load is applied when 10 KM50-� units are connected; and the minimum load, when a single KM20-B40-FLK is connected.

*

6: The vibration resistance when mounted using the ZN9-EM01-S magnets (separately sold): 10 to 55 Hz, 0.3mm double amplitude, acceleration: 20m/s2 for each in X, Y and Z 

directions for 50 min. The installation place must be free from physical shock.

*

7: OMRON's XW4B-02B1-H1 connector.

*

8: This provided AC adapter must be used.

*

9: An AC adapter is provided in the ZN-KMX21 package; and a DC cable and ferrite core are included in the ZN-KMX21-A package.

● 

Declaration of hazardous substances

Lead (Pb)

Toxic or hazardous substances and elements

Polybrominated diphenyl ether

(PBDE)

Polybrominated biphenyl

(PBB)

Hexavalent chromium

(Cr(VI))

Cadmium

(Cd)

Mercury (Hg)

PCB

Enclosure

Accessory

Cable

Name

: Indicates that this toxic or hazardous substance contained in all of the homogeneous materials for this part is below the limit requirement in SJ/T11363-2006. 

–: Indicates that this toxic or hazardous substance contained in at least one of the homogeneous materials used for this part is above the limit requirement in 

SJ/T11363-2006. 

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