ST Engineering Mirra CX1-2AS Plus LoRaWAN Meter Interface Unit
Product Using Instructions
- The product is designed to operate within specified mechanical and environmental conditions to ensure optimal performance.
- Choose a suitable location for the Mirra CX1-2AS Plus unit near the metering equipment.
- Ensure proper power supply and connectivity options are available in the installation area.
- Mount the unit securely using the provided mounting hardware.
- Once installed, follow these steps to configure the unit:
- Access the configuration interface using the provided credentials.
- Set up communication parameters as per your network requirements.
- Adjust the alarm settings based on your preferences.
- Monitor the data readings and alerts displayed on the unit interface.
- Respond to any alarms or notifications promptly to ensure system integrity.
Key Features
- Water meter interface unit
- LoRaWAN communication (AS923MHz)
- Remote scheduled data reporting
- Power saving feature
- Battery life (up to 15 years)
- Integrated pulse sensor
- Battery replacement at site
- Support Firmware-Over-The-Air upgrade
- Infrared for short range configurations
- Alarms (Backflow, Overflow, low battery voltage, anti-tampering, high temperature, Last Gasp, storage exception alarm)
- Secured data protection: AES256
Product Compliant
- Safety: EN 61010-1:2010+A1:2019
- EMC:EN IEC 61326-1:2021
- RF:EN 300220-1 EN 300220-2FCC Part15
- ENVR:EN 60068-2-30:2005, EN 60068-2-2:2007,EN 60068-2-1:2007, IEC 60068-2-38:2021
- RoHS: EN 62321
- Ingress: IEC 60529:1989+A1:1999+A2:2013
- Entrusted: IEC 62262:2002+A1:2021
- Reliability: IEC 62059-31-1
- Drop: IEC 60068-2-31:2008
Mechanical / Working Environment
- Dimensions: 121(L)x100(D)x51(H) mm
- Weight: 0.26KG
- Operating temperature: -20°C to +55°C
- Operating humidity: <95% non-condensing
- Ingress protection: IP68
- Impact rating: IK08
MIU Certifications
- FCC (USA)
- CE (Europe)
- ATEX (Ꜫꭓ) –In accordance with Directive 2014/34/EU
- Quality: STEURS ISO 9001 & ISO 14001
Technical Specifications
Technical Specifications (V2.0)
| COMMUNICATIONS / NETWORK | |||
| Transmission Protocol | LoRaWAN V1.0.2 Class A | Data rate | 0.018 -37.5 kbps |
| Topology | Star | Bandwidth | 125/250/500 KHz configurable |
| Frequency band | 902.3-927.7MHz | Center Frequency | Can be customized |
| TX Power | 20 dBm（max） | Antenna gain | <1.0 dBi |
| RX SENSITIVITY | -139 dBm@SF12/125kHz | Data security | AES256 data encryption (dynamic) |
| Antenna type | Internal (Omi-directional) | ||
| DATA READING | |||
| Data accuracy | Depends on the water meter | Data storage | Up to 30 days of data storage |
| Data reporting interval | Default 1 time/day, configurable up to 3 times/day | Data log interval | Up to 30 minutes data interval |
| Device/Environment status data | MIU firmware version, MIU time (real), Device temperature (°C), | Others data | Number of transmissions, Daily battery voltage level, Data timestamp, Data size |
| MIU identification data | MIU code (unique), devEUI, AppKey, Water meter code | Measured data | Cumulative flow, Cumulative positive flow, Cumulative reverse flow, Collection time, |
| ALARMS | |||
| Water backflow | Supported | High temperature report | Supported |
| Low battery voltage | 3.3V | MIU removal (tamper) | When MIU is removed from the water meter |
| Last Gasp | Battery failure | Storage exception alarm | MIU internal memory failure |
| Overflow alarm | Supported | ||
| CONFIGURATIONS | |||
| No. of days of lost data | Data storage up to 7 days for retrieval | Data transmission/logging interval | Max. up to 3 times/day / up to 15 minutes |
| Time sync | Supported | Local configuration capability | Infrared |
| FEATURES | |||
| Real Time Clock (RTC) | Supported | Firmware OTA upgrade | Supported |
| Integrated pulse sensor | Accuracy up to 99.9% Precision up to 0.1L per pulse | Last Gasp | Supported |
| External interfaces | Inductive pulse, Infrared | Temperature sensor | Supported |
| OPERATING ENVIRONMENT | |||
| Operating Temperature | -20°C to +55°C | Storage temperature | -20°C to +55°C |
| Operating Humidity | <95% RH Non-Condensing | Storage humidity | <99% RH non-condensing |
| Ingress protection | IP68 | Entrusted protection | Impact IK08 |
| POWER SUPPLY | |||
| Battery type | Lithium | Transmission inrush current |
＜80mA |
| Battery life | 15 years (transmission interval, by default 1 time/day), 10 years (transmission interval is 3 times/day) | MIU power consumption during transmission |
Data Sampling per times: ＜0.30uAh Data Report per times: 15uAh |
| Power consumption | ＜200mW | Battery nominal capacity | 19Ah |
| Standby mode | ＜100uW | Battery storage leakage | <1% per year @ +25°C |
| SYSTEM | |||
| Availability | On Demand | Single cast | Supported |
| Device trigger/activation | Magnetic sense | ||
| COMPLIANCE | |||
| Safety | EN 61010-1:2010+A1:2019 | RF radio | EN 300220-1, EN 300220-2
FCC Part15 |
| EMC | EN IEC 61326-1:2021 | Environmental | EN 60068-2-30:2005, EN 60068-2-2:2007
EN 60068-2-1:2007, IEC 60068-2-38:2021 |
| RoHS | EN 62321 | Ingress protection | IEC 60529:1989+A1:1999+A2:2013 |
| Entrusted | IEC 62262:2002+A1:2021 | Reliability | IEC 62059-31-1 |
| CERTIFICATIONS / QUALITY | |||
| Europe | CE RED | Explosive | ATEX |
| STEURS ISO 9001 | Design and Development | STEURS ISO 14001 | Manufacture, Supply, Installation, Maintenance |
| MECHANICAL | |||
| Dimensions | 121(L) x 100(D) x 51(H) mm | Casing material | ABS UV treated |
| Weight | 0.26KG | Casing color | Pantone Color: Cold grey 1C |
Dimension
FCC Statement
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20cm between the radiator & your body.
FCC Warning
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
- This device may not cause harmful interference, and
- this device must accept any interference received, including interference that may cause undesired operation.
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, according to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
NOTE 2: Any changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
CONTACT
- ST Engineering Urban Solutions Ltd.
- www.stengg.com
- URS-Marketing@stengg.com
- © 2021 ST Engineering Electronics Ltd. All rights reserved.
FAQ
- Q: What should I do if I encounter a storage exception alarm?
- A: If you receive a storage exception alarm, check the storage capacity of the unit and ensure it is not exceeded. Clear out unnecessary data or increase storage capacity as needed.
- Q: How do I know if tampering is detected by the unit?
- A: The unit will trigger a tampering alert indicating any unauthorized access or interference with the device. Review the tamper event log in the unit’s interface for details.
- Q: Can I adjust the temperature threshold for high temperature alerts?
- A: Yes, you can typically adjust the temperature threshold in the unit’s settings to customize when high temperature alerts are triggered based on your specific requirements.
Documents / Resources
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ST Engineering Mirra CX1-2AS Plus LoRaWAN Meter Interface Unit [pdf] Owner's Manual Mirra CX1-2AS Plus, Mirra CX1-2AS Plus LoRaWAN Meter Interface Unit, LoRaWAN Meter Interface Unit, Meter Interface Unit, Interface Unit |