| Classification | Project | Qualification |
| Specifications | Working power supply | Voltage: AC176~253 V |
| Frequency: 50Hz | ||
| Work environment | Working temperature | -40℃~+70℃ |
| Relative humidity | 10%~95% | |
| Power dissipation | -------- | ≤5W |
| Clock | Clock precision | <±1s/d |
| Clock cell | CR2032 | |
| Insulating property | Power frequency voltage | 2.5KV |
| Impulse withstand voltage | 6KV | |
| Electromagnetic compatibility | Electrostatic discharge | 8KV |
| Fast transient pulse group | Signal loop: 2KV | |
| Power loop: 4KV | ||
| Surge | Differential mode: 2KV | |
| Common Mode: 4KV | ||
| Data transmission | Communication mode | Uplink: 485 wired |
| Downlink: optional RS485 or M-BUS | ||
| Hardware interface | Choice of RS485 or MBUS:1 path | |
| Reliability | Mean free error time | MTBF≥10×10h |