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ZN-CTX / CTM
Portable Power Monitor
Whenever needed, you can identify the level of electricity consumption immediately at your worksite.
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last update: March 1, 2023
Ratings and Specifications
Logging unit (rating)
| Model | ZN-CTX21-A |
|---|---|
| Connectable sensor | ZN-CTM[]1-[]A |
| Display | 7-seg. 5-digit 2-step LCD display, auxiliary information indicator displays |
| Recording Interval | 1 s, 2 s, 5 s, 10 s, 20 s, 30 s, 1 min. *1 |
| Calculation functions *2 | Momentary power, Integrated power consumption |
| Measurement Mode | Normal mode, Sleep mode *3, High-speed logging mode *4 |
| Recording Mode | Continue mode *5, Ring mode *6 |
| External Output | Alarm output (Photocoupler output) *7 |
| Internal storage device | Internal memory: approx. 6500 data items |
| External storage device | SD card (measured value and converted value saving/set value saving and reading),
Recommended SD card: HMC-SD292 (2 GB) and HMC-SD492 (4 GB) (manufactured by OMRON) *8 |
| Power Supply | DC input: 24 VDC ±10%;
Batteries: Two AAA batteries *9 |
| Current Consumption | 80 mA max. |
| Battery Life *10 | Approx. 1 week *11 |
| Operating Temperature | Battery Supply: -10°C to 60°C (no condensation or icing) |
| Operating Humidity | 20% to 85% (no condensation or icing) |
| Storage Humidity/
Temperature |
-15°C to +60°C, 20% to 85% (no condensation or icing) |
| Insulation Resistance | 20 MΩ (500 VDC) |
| Withstand Voltage | 1000 VAC, 50/60 Hz, 1 min.: Between the case and current input circuit |
| Vibration Resistance | With mounting screws: 10 to 150 Hz, 0.7 mm double amplitude, acceleration:
50 m/s2 for each in X, Y and Z directions for 80 min. With mounting magnets: 10 to 55 Hz, 0.3 mm double amplitude, acceleration: 20 m/s2 for each in X, Y and Z directions for 50 min. |
| Shock Resistance | 150 m/s2 in 6 directions (+/-X, +/-Y, and +/-Z directions), 3 times each *12 |
| Material | ABS |
| Degree of Protection | IP30 |
| Mounting | Magnet mounting, screw mounting, hook |
| Weight (in Package) | Approx. 500 g |
| Accessories | Instruction Sheet, Startup Guide, Mounting Magnets *13, Alarm Output Connector *14,
DC Cable, and Ferrite Core |
*1. In high-speed logging mode, data is recorded in 83 ms at 60 Hz and in 100 ms at 50 Hz.
*2. Momentary power and integrated power values are converted from the measured current. Correctly specify the number of
used channels, application circuit, CT type, frequency, voltage, and power factor.
*3. The display turns OFF after 10 seconds of no user operation and recovers by a key operation when SLEEP mode is
specified LAN cannot be used when sleep mode is specified
*4. Ethernet cannot be used during high-speed logging.
*5. 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.)
*6. 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.)
*7. Output when the integrated power upper limit specified inTHR mode is exceeded. An alarm output is not available in
SLEEP mode.
*8. When using a third party SD card, it is recommended to use a reliable and durable industrial SD card (SD standard or
SDHC standard (not compliant with SDXC standard), Class 4 or higher, flash memory type SLC or MLC type).
You must confirm the operation of the SD card yourself.
*9. Nickel-metal hydride cells or alkaline dry cells can be used. Manganese battery cells cannot be used.
*10. Battery life varies depending on the measurement environment, recording interval, operation mode as well as the
battery type and performance.
*11. Conditions: Two AAA nickel-metal hydride cells; Sleep mode; Continue mode; Recording interval: 1 s; SD memory card:
HMC-SD292; Operation temperature: 23°C ; and Automatic range selection off
*12. The installation place must be free from physical shock when using mounting magnets.
*13. Already installed on the product by factory default.
*14. OMRON’s XW4B-02B1-H1 connector.
*2. Momentary power and integrated power values are converted from the measured current. Correctly specify the number of
used channels, application circuit, CT type, frequency, voltage, and power factor.
*3. The display turns OFF after 10 seconds of no user operation and recovers by a key operation when SLEEP mode is
specified LAN cannot be used when sleep mode is specified
*4. Ethernet cannot be used during high-speed logging.
*5. 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.)
*6. 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.)
*7. Output when the integrated power upper limit specified inTHR mode is exceeded. An alarm output is not available in
SLEEP mode.
*8. When using a third party SD card, it is recommended to use a reliable and durable industrial SD card (SD standard or
SDHC standard (not compliant with SDXC standard), Class 4 or higher, flash memory type SLC or MLC type).
You must confirm the operation of the SD card yourself.
*9. Nickel-metal hydride cells or alkaline dry cells can be used. Manganese battery cells cannot be used.
*10. Battery life varies depending on the measurement environment, recording interval, operation mode as well as the
battery type and performance.
*11. Conditions: Two AAA nickel-metal hydride cells; Sleep mode; Continue mode; Recording interval: 1 s; SD memory card:
HMC-SD292; Operation temperature: 23°C ; and Automatic range selection off
*12. The installation place must be free from physical shock when using mounting magnets.
*13. Already installed on the product by factory default.
*14. OMRON’s XW4B-02B1-H1 connector.
Logging unit (rating)
| Model | ZN-CTX21-A |
|---|---|
| Primary side rated current | Dedicated CT (5 A/50 A/100 A/200 A/400 A) |
| Primary side allowable input current | 120% of rated current (Continue) |
| Accuracy | ±2.0%FS±1 digit (Ambient temperature 23°C, rated input, rated frequency) * |
| Measurement target frequency | 50 Hz/60 Hz |
| Recording values | Current value, instantaneous power, integrated power consumption |
| Applicable circuit | Single phase two-wire, single phase three-wire, three-phase three-wire,
three-phase four-wire |
* An error of the dedicated CT is not included.
Dedicated CT unit (rating and performance)
| Model | ZN-CTM11
-5A |
ZN-CTM11
-50A |
ZN-CTM11
-100A |
ZN-CTM11
-200A |
ZN-CTM11
-400A |
ZN-CTM51
-200A |
|---|---|---|---|---|---|---|
| Primary side rated current | 5 A | 50 A | 100 A | 200 A | 400 A | 200 A |
| Secondary winding | 3,000 turns | 6,000 turns | 3,000 turns | |||
| Applicable frequency | 10 Hz to 5 kHz | |||||
| Insulation resistance | Between output terminal and case: 50 MΩ minimum (500 VDC megohms) | |||||
| Withstand voltage | Between output terminal and case: 2,000 VAC 1 minute | |||||
| Protection element | 7.5 V clamp element | |||||
| Allowable frequency of
disconnection |
100 times | 5,000 times | ||||
| Applicable wire diameter * | 7.9 mm dia.
maximum |
9.5 mm dia.
maximum |
14.5 mm dia.
maximum |
24.0 mm dia.
maximum |
35.5mm dia.
maximum |
23.0 mm dia.
maximum |
| Operating temperature
and humidity range |
-20°C to +60°C 85% maximum (no condensation or icing) | |||||
| Storage temperature and
humidity range |
-30°C to +65°C 85% maximum (no condensation or icing) | |||||
| Voltage of circuit used | 480 VAC maximum | |||||
* If you use a flat cable, select the cable based on the dimensions of the CT.
last update: March 1, 2023
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