The USR-DR502-E is an industrial-grade DIN rail-mounted 4G LTE Cat-1 modem designed for reliable cellular data communication in automation, IoT, and remote monitoring applications. It provides stable, cost-effective LTE Cat-1 connectivity with wide protocol support, making it ideal for industrial control systems, smart infrastructure, and cloud-connected devices.
Designed for harsh environments, the DR502-E features guide rail (DIN rail) installation, a hardware watchdog, and robust ESD and surge protection compliant with IEC standards. It supports transparent data transmission over TCP, UDP, HTTP, and SMS, allowing serial devices to connect seamlessly to IP networks without complex protocol handling.
With built-in support for MQTT and major IoT cloud platforms such as AWS IoT, ThingsBoard, Alibaba Cloud, EMQX, Tuya, and Cumulocity IoT, the USR-DR502-E is well suited for modern industrial IoT deployments. Configuration can be performed easily via SMS, network interface, or serial AT commands, offering flexible setup and remote management.
Key Features
- Industrial DIN rail 4G LTE Cat-1 modem
- Guide rail (DIN rail) installation for industrial cabinets
- Transparent transmission via TCP / UDP / HTTPD / SMS
- Supports TCP, UDP, IPv4, IPv6, HTTP, MQTT, DNS, SSL, TLS
- Cloud support: AWS IoT, ThingsBoard, Alibaba Cloud, EMQX, Tuya, Cumulocity IoT
- RS485 serial interface for industrial devices
- Hardware watchdog for high system reliability
- SMS, network, and serial AT command configuration
- EFT/Surge protection IEC 61000-4-5 Level 3
- ESD protection IEC 61000-4-2 Level 3
Cellular Specifications
- LTE Category: LTE Cat-1
- LTE FDD Bands: B1 / B3 / B7 / B8 / B20 / B28
- GSM/GPRS/EDGE: 900 / 1800 MHz
- LTE Cat-1 Speed (Rel.13):
Download: 10 Mbps
Upload: 5 Mbps - GPRS Speed: 85.6 kbps DL / 85.6 kbps UL
TX Power
- LTE FDD (B1/3/7/8/20/28): 23 dBm 2 dB
- GSM 900 MHz: 33 dBm 2 dB
- GSM 1800 MHz: 30 dBm 2 dB
RX Sensitivity
- GSM 900 MHz: -109.5 dBm
- GSM 1800 MHz: -108 dBm
- LTE FDD B1/B3/B20: -98 dBm
- LTE FDD B7: -97.5 dBm
- LTE FDD B8/B28: -98.5 dBm
Serial Interface
- Interface: RS485 (Terminal) ×1
- Data Bits: 8
- Stop Bits: 1 or 2
- Parity: None / Odd / Even
- Baud Rate: 1200 ~ 230400 bps
Hardware & Interfaces
- SIM/USIM: 1.8V / 3V SIM card slot
- Antenna: SMA Female
- USB: USB 2.0
- Indicators: POWER, WORK, NET, LINK, RSSI
- Reload: Button
- Reset: -
Electrical & Environmental
- Input Voltage: 9-36 VDC
- Power Consumption: < 3 W
- Housing: ABS plastic
- Dimensions: 44.5 × 31.8 × 13.94 mm (L × W × H)
- Operating Temperature: -30 C to +75 C
- Storage Temperature: -40 C to +85 C
- Operating Humidity: 5%-95%
- Storage Humidity: 5%-95%
Software & Data Handling
- Protocols: TCP / UDP / IPv4 / IPv6 / DNS / HTTP / MQTT / SSL / TLS
- Serial to Network: 4 sockets (default A)
- SMS Mode: PDU / TEXT
- Configuration: Serial, Network, SMS AT commands
- Cache: 20 packets × 4 KB
- Packaging Time: 10-500 ms (default 50 ms)
- Packaging Length: 5-65535 bytes (default 1024)
- Configuration Tool: USR-Cat1 Configuration Utility
Certifications
What's in the box
1 x USR-DR502-E - DIN Rail 4G Cat-1 Industrial Modem
