| Quantity(Sets) | 1 - 100 | >100 |
| Est. Time(days) | 7 | To be negotiated |
Industrial Grade NB-IoT DTU
Support CoAP Protocol,China Telecom Cloud,NB-IoT,
LPWAN,support external battery power supply
ZSN311 NB-IoT DTU is a external terminal based on the NB-IoT for wireless data transmission, small volume,support multiple interfaces;support the online,IDLE,PSM status, get the lower standby power consumption; Support UDP/CoAP network protocol, providing the fully transparent data transmission mode for users; Support customized heartbeat packet,registration packet,header; Support our self-built IoT Cloud without building server by users; Fully support industrial SCADA, users needn’t care of the complex network protocol, just by full transparent transmission serials you can achieve wireless data sending&recei, making your device connect into Internet without the limitation of time or place.Using the Quectel Industrial Grade Communication Chip
MDN311-485 uses the Quectel Industrial Grade Communication Chip so that efficiently guarantee uninterrupted NB-IoT network communication.
MDN311 Support CoAP protocol
NB-IoT DTU can choose Mind IoT Cloud/China Telecom IoT Cloud
Mechanical Dimensions
Function Introduction
Technical Parameters
| Characteristics | Descriptions |
| Power supply | VIN interface: DC5V-30V |
| BAT interface: DC3.5V-4.2V | |
| Power consumption | Regular version:VIN interface, DC12V Power Supply |
| Online Mode Current:60mA-150mA | |
| Peaking working Currentt:500mA | |
| PSM/IDLE Mode Current:≈13mA | |
| Low power version: BAT interface, 3.7V Lithium battery Power Supply | |
| Online Mode Current:60mA-150mA | |
| Peaking working Currentt:500mA | |
| PSM/IDLE Mode Current:≈20uA | |
| Frequency Band | MDN311-B5: China Telecom 850M |
| MDN311-B8: China Mobile/Unicom 900M | |
| MDN311-Bx: International version | |
| Network | NB-IoT UL/DL:200kbps/200kbps |
| SIM Card | Micro SIM:3V |
| Antenna Connector | SMA connector-external thread inner hole |
| Series Data interface | RS232,RS485 Level |
| Baud Rate:1200-38400bps | |
| Data bits: 8 | |
| Parity check:No | |
| Stop bits:1bits | |
| Temperature range | Working environment temperature: -30°C to +75°C |
| Storage temperature -40°C to +85°C | |
| Humidity range | Relative humidity 95% (no condensation) |
| Physical characteristics | length: 10.5cm, width: 6cm, height: 2.2cm |
The device runs with low power consumption and can't receive downlink data from the data center.
The DTU must actively upload data and enter the connection mode before the center can send data.
After no data communication, MDN311 automatically enters PSM mode to maintain low power consumption standby.
MDN311 supports script programming function. Users can customize script files through the graphical configuration software of the equipment, so that on-site applications do not require additional controllers, and do not need to rely on the data platform to issue collection instructions to achieve direct connection to the instrument. MDN311 Directly and actively collect data from the instrument and report it to the platform.
Flexible Data Packet Format Customization
Custom registration packet: Users can freely configure the content of the data packet sent when MDN311 is first connected to the data center.
Custom heartbeat packet: Users can freely configure the content of the heartbeat packet sent by MDN311 to the data center.
Custom header packet: User can configure specific content before the data packet sent by the DTU to the data center in order to distinguish the data type or category.