B+B SmartWorx BB-ESR902

Product Brief Introduction

Fanless hardened M2M cellular gateway designed for remote industrial field data transmission, integrating wired Ethernet, serial communication and multi-band cellular LTE connectivity, certified for wide-temperature industrial automation deployment.
Category:
Description

Technical Specifications

  1. Cellular Module: 4G LTE Cat.4 global multi-band, fallback 3G UMTS/2G GSM
  2. Ethernet Ports: 4 × 10/100 Mbps Fast Ethernet RJ45, IEEE802.3 compliant
  3. Serial Interfaces: 1 × RS232, 1 × RS485 terminal block, terminal screw connection
  4. Digital I/O: 2DI / 2DO opto-isolated digital terminals
  5. Power Input: 9–48 VDC wide range industrial DC power, reverse polarity protection
  6. Operating Temperature Range: -40°C to +75°C
  7. Enclosure Rating: IP30 metal housing
  8. Mounting Standard: DIN rail 35mm EN60715 mounting
  9. Memory: 512MB RAM, 4GB industrial eMMC flash storage
  10. Wireless Auxiliary: Optional Wi-Fi 802.11 b/g/n, Bluetooth 4.2

Functional Features

  • Hardware watchdog auto-reboot for cellular link failure recovery
  • Multi-SIM dual-card automatic failover for uninterrupted network
  • VPN tunnel support: IPsec, OpenVPN, GRE, L2TP
  • Firewall, NAT, port forwarding, traffic QoS bandwidth management
  • Serial-to-IP transparent Modbus RTU/TCP conversion
  • Remote device management via B+B SmartWorx cloud platform
  • Hardware encryption chip for end-to-end industrial data encryption

Structural Characteristics

  • All-aluminum extruded housing for passive heat dissipation (zero fan design)
  • Front panel separated communication terminals, cellular antenna SMA connectors
  • Side DIN rail clip integrated, wall mounting holes pre-machined
  • Terminal blocks with screw lock for vibration-resistant wiring

Material Composition

  • Main housing: Extruded aluminum alloy AL6063
  • Internal PCB: FR4 high-Tg industrial circuit board
  • Terminal hardware: Nickel-plated copper conductive terminals
  • Sealing gaskets: Silicone high-low temperature resistant rubber

Working Principle

Collect field data via Ethernet/RS485 industrial bus; encapsulate data packets through internal protocol stack; transmit encrypted data to remote server via cellular mobile network; receive downlink control instructions from cloud/central SCADA and forward to local field instruments via wired interfaces; hardware watchdog continuously monitors CPU and cellular link status to execute automatic recovery on communication outage.

Advantage Highlights

  • Full wide-temperature range operation without cooling accessories
  • Multi-network redundant communication eliminates single-point transmission failure
  • Native Modbus protocol conversion eliminates intermediate protocol converters
  • DIN rail compact form factor fits standard industrial control cabinets
  • Certified ATEX / IECEx for hazardous low-risk industrial zones

Applicable Industries

Water treatment monitoring, remote energy meter reading, transportation roadside equipment, agricultural IoT, mining auxiliary monitoring, oil & gas field remote terminals, factory distributed automation

Installation Requirements

  1. Mount vertically on standard 35mm DIN rail inside sealed control cabinet
  2. Maintain minimum 20mm clearance on top and bottom for heat convection
  3. Install cellular external antennas outside cabinet metal enclosures to avoid signal attenuation
  4. Power supply must adopt isolated industrial DC power unit with surge protection
  5. Ground device chassis to cabinet protective earth terminal

Usage Precautions

  • Do not operate device outside -40°C ~ +75°C ambient temperature
  • Avoid mounting adjacent high-frequency variable frequency drives to prevent RF interference
  • Use shielded twisted pair cable for RS485 bus wiring with single-point grounding
  • Replace SIM card only after complete power cut-off to avoid circuit burnout
  • Conduct regular firmware upgrade via wired Ethernet instead of cellular link to prevent transmission interruption
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