Edge IoT Gateway
DIN-rail gateway for collecting Modbus data from RS485 / RS232 devices and sending it to MQTT, Modbus or OPC UA systems over Ethernet, optional 4G or Wi-Fi.
Category: Remote Monitoring Gateways & RTUs
Representative image
Representative industrial gateway family visual derived from a reviewed supplier-family reference and independently de-identified. It is not the final ordered-model photograph; serial-port count, network option, enclosure details, connectors and certificates are confirmed in the quotation.
Specifications
| Serial options | 2 or 6 RS485 / RS232 ports |
|---|---|
| Ethernet | 1 × WAN + 1 × LAN, 10/100 Mbps |
| Data capacity | 2-port: up to 10 devices / 512 points; 6-port: up to 50 devices / 4,000 points |
| Uplink protocols | Model-dependent MQTT, Modbus TCP / RTU and OPC UA server |
| Network options | Ethernet standard; 4G or Wi-Fi by selected configuration |
| Power supply | 9–36 VDC with reverse-polarity protection |
| Mounting / enclosure | DIN rail or wall mount; IP30 plastic enclosure |
| Dimensions | 30 × 83 × 110 mm (2-port); 40 × 83 × 110 mm (6-port) |
| Operating environment | -40 to +85 °C; 5–95% RH (supplier manual) |
| Offline queue boundary | Supplier-format MQTT only; up to 100,000 points in RAM; lost on power loss or restart |
What the reviewed outage queue does — and does not do
Use these limits when the project depends on data recovery after a network interruption.
- The queue must be enabled and works only with the supplier-format MQTT template.
- It holds up to 100,000 data points in RAM. Queued data is lost if the gateway loses power or restarts.
- When the limit is reached, the oldest queued data is deleted.
- Backlog and live data are sent in parallel. Replay speed is not configurable and follows the normal transmission interval.
- The reviewed queue does not apply to custom JSON, Sparkplug B or OPC UA history.
- Original sampling timestamps, replay order and end-to-end integrity have not been verified. Define and test these requirements before purchase.
Typical applications
- Aggregate Modbus devices across 2 or 6 serial ports
- Send field data over Ethernet, optional 4G or Wi-Fi
- Publish selected values to MQTT or expose supported Modbus / OPC UA roles
- Use the reviewed volatile MQTT queue for defined network-outage cases
Inquiries: contact@sungeneiot.com · sungeneiot.com
Specifications are for reference and may be updated; confirm the final spec with SunGene before ordering.