Product Short Description
Manufacturer: B+B SmartWorx (Belden Brand)
Product Overview:
The BB-ESR902 is a dual-port RS-232/422/485 serial device server designed for industrial Ethernet connectivity. It provides transparent serial-to-Ethernet conversion, enabling legacy serial devices to operate on modern TCP/IP networks.
Description
Technical Specifications:
| Parameter | Value |
|---|---|
| Serial Ports | 2 ports (RS-232/422/485 configurable) |
| Ethernet Port | 1x 10/100 Base-TX RJ-45 |
| Protocol Support | TCP, UDP, HTTP, Telnet, DHCP, DNS, ARP |
| Serial Baud Rate | 300 bps to 921.6 kbps |
| Data Bits | 5, 6, 7, 8 |
| Stop Bits | 1, 1.5, 2 |
| Parity | None, Even, Odd, Mark, Space |
| Flow Control | RTS/CTS, XON/XOFF |
| Operating Temperature | -25°C to +75°C |
| Power Input | 9–30 VDC |
| Housing | Metal DIN-rail mountable |
| Dimensions | 120 x 94 x 25 mm |
| Certifications | CE, FCC, UL/cUL, ATEX (depending on variant) |
Functional Features:
- Transparent data tunneling with no protocol modification
- Supports Modbus TCP gateway mode
- Built-in web-based configuration interface
- Dual watchdog timer for network and serial link monitoring
- Supports virtual COM port (VCP) driver for PC integration
- SNMP v1/v2c support for network management
Working Principle:
The device receives serial data from connected equipment, encapsulates it into TCP/UDP/IP packets, transmits over Ethernet, and decapsulates incoming network data back to serial format. Full bidirectional transparent bridging with no data alteration.
Advantages:
- Eliminates need for serial cables over long distances
- Enables remote monitoring of serial devices over LAN/WAN
- Robust industrial-grade design for harsh environments
- Zero-configuration deployment via DHCP
Applicable Industries:
Building automation, SCADA systems, industrial process control, energy management, water/wastewater treatment
Installation Requirements:
- DIN-rail (35mm TS-35) or wall mounting
- 9–30 VDC power supply
- Ethernet connection to switch/router
- Serial cable (DB-9 or terminal block depending on configuration)
Usage Notes:
- Ensure correct baud rate and parity match between device server and connected serial device
- Use shielded serial cables in electrically noisy environments
- Firmware updates available via web interface or TFTP
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