[Transmission Type] : GPRS
[Working voltage] : 8V~28V
[Size] : 172*107*29mm
[Interface] : RS485
[Weight] : 453±5g
[Introduction] : E850-DTU (4440-GPRS) is a network IO product that supports 4 switch inputs (default dry contact), 4 analog inputs, and 4 relay outputs. Support Modbus TCP/RTU protocol. The product is highly easy to use and can be easily and quickly integrated into your system for GPRS-based remote control.
| Wireless parameter | Description |
| Standard frequency band | 850/900/1800/1900MHz |
| Hardware parameter | Description |
| Size (H*W*D) | 172*107*29mm |
| Working temperature | -20℃~+70℃ |
| Storage temperature | -40℃~+85℃ |
| Working humidity | 5%~95% |
| Storage humidity | 1%~95% |
| Working voltage | 8V~28V |
| Current collection range | 0mA~20mA |
| Accuracy | 0.2% |
| Data interface | RS485：1200~115200bps |
| Software parameter | Description |
| Network type | GPRS |
| Configuration command | Modbus TCP/RTU |
| Network protocol | Modbus TCP/RTU |
| Working mode | Master mode, slave mode |
| Data transmission mode | TCP Client |
| No. | Definition | Function | Description |
| 1 | RS485 G | Signal ground | Signal ground, can be no onnected |
| 2 | RS485 A | RS485 A | RS485 A connects with device A |
| 3 | RS485 B | RS485 B | RS485 B connects with device B |
| 4 | DC-IN- | Power input negative | Power ground |
| 5 | DC-IN+ | Power input positive | Power input, DC 8V~28V, recommended 12V/24V |
| 6 | DC-IN | DC 5.5*2.1mm | Power input, DC 8V~28V, recommended 12V/24V |
| 7 | Ground screw | Ground | Ground |
| 8 | Reload | Reset button | Long press 5s to work |
| 9 | SIM Card slot | SIM Card slot | Insert SIM card to connect network |
| 10 | ANT | Antenna interface | GPRS antenna |
| Order online |
| 【eBay】：https://www.ebay.com/usr/cdebyte |
| 【Aliexpress】：https://www.aliexpress.com/store/2798183 |
| 【Alibaba】：https://www.alibaba.com |
| For batch order/customized product |
| 【Sales hotline】：+86-28-61399028 Ext.812 |
| 【E-mail】：service@cdebyte.com |
| Technical support |
| 【Submit online】：http://www.ebyte.com/en/apple-technology.aspx |
| 【E-mail】：support@cdebyte.com |
| Model | Interface | Transmission protocol | Network type | TCP/RTU | Ebyte cloud | Working mode | Size(mm) | Feature | Manual | Sample |
|---|---|---|---|---|---|---|---|---|---|---|
| E850-DTU(4440-4G) | RS485 | Switch/analog signal | - | Support | Support | Master mode Slave mode | 172*107*29 | 12-channel network IO controller | ||
| E850-DTU(4440-4G) | RS485 | - | 4G | Support | Support | Master mode Slave mode | 172*107*29 | 12-channel network IO controller | ||
| E850-DTU(4440-GPRS) | RS485 | Switch/analog signal | - | Support | Support | Master mode Slave mode | 172*107*29 | 12-channel network IO controller | ||
| E850-DTU(4440-GPRS) | RS485 | - | GPRS | Support | Support | Master mode Slave mode | 172*107*29 | 12-channel network IO controller |
