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| Model | LTE NB-IoT(Bands) | Micro SD | Power Backup | GPS | Local IO | Support Protocol | Session Number | Each Session Modbus Number | Modbus Protocol | Support CHT platform | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| GRP-540M-NB | LTE NB-IoT: B1/B3/B5/B8/B20/B28 |
Yes | No | Yes | No | UDP, MQTT | 2(v1.0.1 or above version) | 32xAI, 32xDI,32xAO,32xDO | RTU/TCP | Yes | |
| RTU-540P-NB | LTE NB-IoT: B1/B3/B5/B8/B20/B28 |
Yes | 1250mAh 3.7V Battery | Yes | 1*AI, 6*DI, 2*DO | UDP, MQTT | 1 | 31xAI, 26xDI,32xAO,32xDO | RTU | No | |