4-Channel Serial Data Ring Network Fiber Modem

This device provides 4 channels of RS232/422/485 transmission over fiber optic cables and supports various fiber network topologies, including point-to-point communication, chain networks, star networks, and redundant ring network with self-healing protection. It can also be used to create more complex network topologies with self-healing protection. This product overcomes the contradiction between the distance and communication speed of traditional serial interface communication. It also addresses challenges such as electromagnetic interference, ground loop interference, and lightning damage, significantly improving the reliability, security, and confidentiality of data communication.

● This device provides 1-4 independent serial ports (RS232/422/485 optional) channels, which are physically isolated from each other with no correlation.

● It offers two fiber optic line paths that automatically switch in case of line failure to ensure uninterrupted communication.

● It supports various fiber network topologies, including point-to-point, star, chain, and redundant ring, which can be combined to form more complex network topologies.

● The electrical interface of this device is powered by an independent power module, completely isolating the ground loop between the bus and the device. It also utilizes opto-isolation technology to isolate internal communication from the bus data signal, effectively protecting the communication equipment from interference and damage caused by power ground loops and surges.

● The RS232/485/422 interfaces are available, with RS232 supporting 3-wire RS232 (TXD/RXD/GND) and flow control (DCD/DSR/CTS).

● The RS232/485/422 channels on this device can transmit asynchronous serial data with adaptive baud rates ranging from 0 to 115,200.

● The serial interface of this device meets IEC61000-4-5 (10/700μS) standards for lightning protection, with differential mode: 6KV impedance (2Ω) and common mode: 6KV impedance (2Ω).

● It supports internal isolation and redundant dual power inputs.

● It also supports a wide range of 9-55V AC and DC power inputs.

● The power supply of this device features overload protection and reverse connection protection.

● It complies with industrial-grade electromagnetic compatibility requirements.

● The device is housed in an anodized aluminum alloy enclosure with an IP40 rating, capable of withstanding harsh environmental conditions.

● DIN rail or wall-mounted for installation.

● Fiber

Fiber Type: 

Fiber Interfaces: FC/SC/ST/LC (SFP)

Wavelength: 850nm/1310nm (Multi-mode); 1310nm/1550nm (Single-mode)

Non-Relay Transmission Distance: 20-120Km

Typical Transmit Power:

Single Mode 1310/1550nm: ≥-9dBm

Multi-mode 850nm: -18dBm

Multi-mode 1310nm: -25dBm

Receive Sensitivity Range: -28dBm to -40dBm

● RS232/422/485 Interface

Standards:

EIA/TIA-232 RS-232 (ITU-T V.28)

EIA/TIA-422 RS-422 (ITU-T V.11)

EIA/TIA-485 RS-485 (ISO/IEC 8284)

Serial Interface:

RS-422: TxD+, TxD-, RxD+, RxD-

RS-485 4 wires: TxD+, TxD-, RxD+, RxD-

RS-485 2 wires: A (corresponds to TxD+), B (corresponds to TxD-), Signal Ground

RS-232: RXD, TXD, Signal Ground

Connector: Phoenix terminal

● Working Environment

Working temperature: -40℃ ~85℃

Working Humidity: 5%~95 % (no condensation)

Storage temperature: -40°C ~ 80°C

Storage Humidity: 5%~95 % (no condensation)