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2CCA880211R0001 ABB CMS-121PS 18 mm 40 A Open-Core Current Sensor
ABB CMS-121PS is an 18 mm open-core current sensor with a 0.1–40 A measurement range, accuracy class 1 and InSite bus connectivity for compatible pro M compact and SMISSLINE branch-circuit monitoring installations.
£46.91
Why Choose the ABB CMS-121PS 40 A Open-Core Current Sensor?
The ABB CMS-121PS is a compact open-core current sensor designed for branch-circuit monitoring and energy-management applications. As part of the ABB CMS Circuit Monitoring System, this 18 mm sensor provides precise current measurement for individual electrical circuits and supports detailed monitoring within compatible ABB InSite installations.
Designed for compatible ABB pro M compact and SMISSLINE installation devices with twin terminals, the CMS-121PS uses an open-core construction that supports convenient installation around the monitored conductor. Its compact format makes it particularly suitable for distribution boards where multiple circuits require individual monitoring without excessive space requirements.
With a measurement range of 0.1–40 A, current accuracy of ≤±1% full scale and an InSite bus flat-cable interface, the CMS-121PS provides dependable circuit-level measurement with straightforward system integration. ABB order code 2CCA880211R0001 identifies this 40 A open-core CMS sensor.
Key Advantages
- Compact 40 A open-core current sensor for branch-circuit monitoring.
- Wide 0.1–40 A measurement range for individual electrical loads.
- Open-core construction supports convenient installation around conductors.
- Designed for compatible ABB pro M compact and SMISSLINE devices with twin terminals.
- Current accuracy of ≤±1% full scale for dependable monitoring.
- Integrates with compatible ABB monitoring systems through the InSite bus flat-cable interface.
Key Features
- ABB CMS Circuit Monitoring System sensor.
- 40 A maximum measurement current.
- 0.1–40 A measurement range.
- 18 mm open-core sensor construction.
- Accuracy class 1.
- Current accuracy of ≤±1% full scale.
- InSite bus flat-cable interface.
- Designed for pro M compact and SMISSLINE installation devices with twin terminals.
- Compact surface-mounted format for distribution equipment.
- Operating ambient temperature range of -25 to +70 °C.
Flexible Circuit Monitoring for Energy Management
Current sensors such as the ABB CMS-121PS provide detailed visibility of individual electrical circuits within a wider energy-management system. Branch-level current measurements can support energy-consumption analysis, load supervision and identification of unusual operating conditions within commercial, industrial and critical-power distribution systems.
The CMS-121PS combines an open-core design with compact dimensions and ABB's InSite flat-cable architecture. This makes it particularly useful where multiple circuits need to be monitored efficiently within compatible pro M compact and SMISSLINE distribution equipment.
Typical Applications
- ABB CMS and InSite energy-monitoring systems.
- ABB pro M compact electrical installations.
- ABB SMISSLINE distribution systems.
- Branch-circuit current monitoring.
- Electrical distribution boards and switchboards.
- Commercial building energy monitoring.
- Industrial electrical load monitoring.
- Data centre and critical-power monitoring.
Technical Specifications
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| Accuracy Class | Class 1 | |
|---|---|---|
| Device Type | Split-core CT | |
| Rated Primary Current (A) | 40 A | |
| Aperture (mm) | 10 mm | |
| Series | CMS Circuit Monitoring System | |
| ABB order code | 2CCA880211R0001 | |
| EAN | 7612271452971 | |
| Product type | Open-core current sensor | |
| Maximum measurement current | 40 A | |
| Measurement range | 0.1–40 A | |
| Accuracy class | 1 | |
| Current accuracy | ≤±1% full scale | |
| Sensor type | Open-core, 18 mm | |
| Conductor opening | 10 mm | |
| Power consumption at rated load | 0.18 W | |
| Communication interface | InSite bus (flat cable) | |
| Mounting type | Surface mounting | |
| Device compatibility | pro M compact and SMISSLINE devices with twin terminals | |
| Operating temperature | -25 to +70 °C | |
| Dimensions (W × H × L) | 17.4 × 26.5 × 41 mm | |
| Net weight | approx. 0.012 kg |
Frequently Asked Questions
What is the ABB CMS-121PS used for?
The ABB CMS-121PS is used for branch-circuit current monitoring in ABB CMS and InSite energy-management installations and is designed for compatible pro M compact and SMISSLINE devices with twin terminals.
What current range can the CMS-121PS measure?
The CMS-121PS has a measurement range of 0.1–40 A, making it suitable for monitoring individual branch circuits with currents up to 40 A.
How accurate is the ABB CMS-121PS?
The CMS-121PS has accuracy class 1 and specified current accuracy of ≤±1% of full scale for dependable circuit-level monitoring.
What type of sensor is the CMS-121PS?
The CMS-121PS is an 18 mm open-core current sensor. Its open-core construction supports convenient installation around the monitored conductor in compatible electrical distribution equipment.
Where is the ABB CMS-121PS installed?
The CMS-121PS is designed for compatible ABB pro M compact and SMISSLINE installation devices with twin terminals and uses a compact surface-mounted configuration.
Trusted Circuit Monitoring from ABB
ABB CMS open-core current sensors provide compact and flexible branch-level measurement for energy-management systems, helping operators gain detailed visibility of electrical loads while supporting efficient integration into modern distribution equipment.
