12-Port(with 8 PoE+/PoE++)Serial Over Ethernet Industrial Switch

The new generation Managed PoE Industrial Switch with 8-Port 10/100/1000Base-TX + 2 x RS485/422/232 and 2xGigabit uplink ports to provide stable and reliable Ethernet transmission. It converts RS-232/422/485 connections to Ethernet connections, allowing for seamless communication between traditional serial-based devices such as PLC, meters, sensors, and barcode readers to an IP-based Ethernet device. Moreover, It can supply power to PD terminal equipment such as wireless AP, webcam, VoIP, and visual intelligent building intercom through network cable and meet the network environment that needs a high-density PoE/PoE+/PoE++ power supply.



  • All-aluminum Case, Compact and Fanless Design
  • -40 to 75℃ temperature maintains performance in extreme conditions
  • DIN Rail and wall-mountable – quick to install and remove for maintenance
  • Full gigabit L2+ management, easy to manage the industrial network by CLI/WebGUI/NMS.
  • Build up a redundant network with STP/RSTP/MSTP/ERPSv2.
  • RADIUS, SNMPv3, IEEE 802.1x, HTTPs, SSHv2 and sticky MAC address to enhance network security
  • EherNet/IP and Modbus TCP protocols supported for device management and monitoring
  • Electric 8KV surge protection Complete status indicator, working state at a glance
  • Power input polarity protection design, no worry about wrong operation
  • QoS, Priority mode based on 802.1P, Port & DSCP, queue scheduling algorithm including Equ, SP, WRR&SP+WRR

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Managed Industrial Network Switch with PoE

FR-7M3408SBT L2+ Managed Industrial PoE switch has high-standard industrial grade and synchronously supplies power and data to power devices across a copper cable. Connects such as Wireless AP, IP Camera, and VoIP Phones satisfy both IEEE802.3bt PoE++ and gigabit ethernet connection. It will increase bandwidth for higher performance when transferring large amounts of services across Ethernet networks.


1. IEEE802.3af/at/bt standard automatically identifies power devices without damaging non-PoE devices.
2. Up to 90W per port.
3. PoE++ Switch port will supply power to the high priority level port when the power budget is insufficient.
4. PoE output power allocation, Scheduling of PoE operation.


1. Build a redundant network with STP/RSTRP/MSTP/ERPSv2.
2. IPv4/IPv6 Management and Static Route
3. ACL Based on MAC, IP address.
4. Retagging and complicated flow classification based on VLAN, MAC/IP.
5. Flexible bandwidth control policies.


1. Web-based CloudMQTT to monitor the PoE Network anytime, anywhere.
2. Command-line interface(CLI) and Firo WebGUI management for configuring major managed functions.
3. SNMPv1/v2C/v3 for different levels of network management.
4. FIRO Web-based NMS enable discovery and diagrams of PoE++ Switch network topology.


1. AAA&RADIUS, IEEE 802.1X, SNMPv3, HTTPs/SSLv3,SSH2.0 to enhance network security.
2. Support user hierarchical management, ACL control list
3. Port isolation within the same VLAN, DHCP-Snooping
4. DDOS, port-based MAC filtering/binding, MAC black holes, IP source protection, ARP message speed limit

Industrial-grade Design for a Harsh Environment

Additionally, the aluminium housing and fanless design provide efficient heat dispersal. Moreover, the switch operates at a wide temperature range (-40 to +75°C). The industrial PoE switch also supports Energy-Efficient Ethernet(EEE) to reduce power consumption by 50% while retaining compatibility with existing equipment.

Compliance with IEEE802.3af/at/bt PoE++ Standard

IEEE802.3af/at/bt standard applies to ports 1-8. As a critical addition, it can automatically identify and recognize all power devices that meet the standard and supply power through the network cable.

Converting Between Serial and Ethernet Connectivity

Fiberroad Serial over Ethernet Industrial Switch provides an all-in-one solution. It converts RS232/422/485 connections to Ethernet connections, allowing seamless communication between traditional serial-based devices such as PLC, meters, sensors, and barcode readers to an IP-based Ethernet device. More importantly, the industrial switch is fully compliant with Modbus/TCP and offers a convenient solution for connecting existing devices or controllers running the Modbus serial protocol(Modbus/ACSCII or Modbus/RTU) to an Ethernet network.

Establish a secure network with L2+ industrial switches

FR-7M3408SBT provides robust Layer 2+ Gigabit networks connectivity, including but not limited to Static route, LAN network security, ACL/QoS policy… Moreover, By configuring ITU-T G.8032 ERPS (Ethernet Ring Protection Switching) technology, Spanning Tree Protocol (802.1s MSTP), and redundant power system in industrial automation networks to enhance system reliability and uptime in harsh environments. As can be seen, the Managed Industrial Switch is easy to manage and maintain.

Manage the Industrial PoE Network Anytime, Anywhere

Managed Industrial PoE Switch allows various network management methods, such as the WebGUI, CLI and NMS. The notion of easy to use, particularly with no additional hardware investment and installation. Industrial PoE Switch can deploy centralised management, real-time monitoring, checking PoE usage and scheduling PoE operation.


Where are industrial switches used?

Industrial and factory automation systems.
Outdoor electrical application.
Rail and intelligent transportation system(ITS).
Oil and gas platforms.
Clean Energy System

What is the difference between industrial switches and normal switches?

Industrial Ethernet switches have a wide operating voltage range, while regular switches require higher voltages. Regular switches are basically single power supply, while industrial switch power supplies are generally dual power supply backup. Industrial Ethernet switches can be installed in DIN rails and racks.

Ethernet Interface
Model FR-7M3208SP FR-7M3208SBT

8×10/100/1000Base-T(X)Ports(RJ45 connector)

2×100/1000Base-FX (SFP Slots)

2x RS485/422/232(5-pin Serial Terminal)

Port Mode(Tx)

Auto-Negotioation Speed

Full/Half Duplex Mode

Auto MDI/MDI-X Connection


IEEE 802.3 for 10BaseT

IEEE 802.3u for 100BaseT(X) and 100BaseFX

IEEE 802.3ab for 1000BaseT(X)

IEEE 802.3z for 1000BaseSX/LX/LHX/ZX

IEEE 802.3x for flow control

IEEE 802.1D-2004 for Spanning Tree Protocol

IEEE 802.1w for Rapid Spanning Tree Protocol

IEEE 802.1s for Multiple Spanning Tree Protocol

IEEE 802.1p for Class of Service

IEEE 802.1Q for VLAN Tagging

IEEE 802.1X for authentication

IEEE 802.3ad for Port Trunk with LACP

Packet Buffer Size 4Mbits
Maximum Packet Length Up to 10K
MAC Address Table 8K
Transmission Mode Store and Forward (full/half duplex mode)
Exchange Property

Delay time: < 7μs

Backplane bandwidth: 24Gbps

IGMP GroupS 2048
Max. No. of VLAN 64
VLAN ID Range VID 1 to 4094
Series Port Parameters
Ports 2 x RS485/422/232

RS-232: a:TXD、b:RXD、c:Na、d:Na、e:GND

RS-422: a:T+、  b:T-、  c:R+、d:R-、 e:GND

RS-485: :a: Na、 b: Na、 c:D+、d:D-、 e:GND

Baud rate 2400-115200bps
Terminal 5-Pin Terminal
Load Capacity RS-485/422 supports 128 points polling environment
Movement RS-485 adopts automatic data flow control technology
Interface Protection

RS-232  15KV static protection

Isolation voltage 2KV, electrostatic protection 15KV

Management Features
Serial Protocol TCP Server/Client, UDP, Modbus ASCII TCP Server/Client, Modbus RTU Server/Client
Interconnection Data Bits, Parity, Stop Bits Configuration
Serial Statistics Bytes and Packets Statistics
PoE & Power Supply
Model FR-7M3208SP FR-7M3208SBT
PoE Ports Port 1 to 8 IEEE802.3af/at @PoE+ Port 1 to 8 IEEE802.3af/at/bt @PoE++
Power Supply Pin Default: 1/2(+), 3/6(-) Default: 1/2(+), 3/6(-) or 4/5(+), 7/8(-)
Max Power Per Port 30W 90W
Total PWR /Input Voltage 240W(DC48-56V) (Model dependent) 480W(DC48-56V) (Model dependent)
Power Consumption 10 Watts Max(without PoE load)
Power Inputs 2
Input Voltage 9-56VDC, Redundant dual inputs
Operating Voltage

Non-PoE Mode: 9-56VDC

30W PoE Mode: 48-56VDC

90W PoE Mode: 52-56VDC(IEEE802.3bt model)


1 removable 6-contact terminal blocks

Pin 1/2 for Power 1, Pin 3/4 for Power 2, Pin 5/6 for fault alarm

Protection Overload Current Protection, Reverse Polarity Protection

Support Documents

Item Type Version Release Date
2D Drawing
99 KB
2D Drawing 2.0
Tech Note _STP
597 KB
Tech Note
Serial over Ethernet Industrial PoE Switch_ Product Data Sheet
504 KB
Quick Start Guide
22 MB
WebGUI Network Management User Manual
8 MB

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