Industrial 8-Port isolated RS485 Hub

Expand SCADA networks with this Industrial 8-Port RS485 Hub. It actively splits one master signal into eight independent slave branches, enabling flexible star topologies with 2500V optical isolation and adaptive baud rates up to 460.8kbps.

Part No. 8CH-HUB-RS485
sku : IoT-IC101
INSTANT QUOTE

Industrial 8-Port RS485 Hub

Expand one RS485 master into 8 independent slave branches. This active repeater enables network relay, extension, and isolation, breaking traditional daisy-chain wiring limits.

Industrial 8-Port RS485 Hub features overview
Supports RS485 network relay extension and isolation functions

Flexible Star Topology

Build resilient networks. The hub splits the master signal into 8 isolated branches, forming a star topology where a fault on one branch won't crash the entire communication bus.

RS485 Host to 8-channel Slave connection diagram

2500V Optical Isolation & Adaptive Baud Rate

Features 2500V optical isolation and 12KV surge protection to safely block ground loops. The plug-and-play engine automatically adapts to baud rates from 300 to 460,800 bps.

Industrial isolation protection photoelectric circuit
Wide baud rate range 300 to 460800 bps self-adaptive

Hardware Interfaces & DIN-Rail Mount

Designed for control cabinets with a standard 35mm DIN-rail buckle. Features pluggable screw terminals and clear LED indicators (POWER, TXD, RXD, CH1-CH8) for instant diagnostics.

35mm standard guide rail mount support
Hardware interface introduction and LED indicators
8CH-HUB-RS485 product physical show
Physical CAD outline dimensions

Hub Selection Guide

Model2CH-HUB-RS4854CH-HUB-RS4854CH-HUB-RS232/4858CH-HUB-RS485 (This Model)
Function2-channel active hub4-channel isolated hub4-channel isolated hub8-channel isolated hub
Physical InterfaceRS-485 3PIN terminal *3RS-485 2PIN terminal *5RS-232 DB9 *1, RS-485 2PIN *5RS-485 2PIN terminal *9
Baud Rate1200 ~ 460800 bps300 ~ 460800 bps (adaptive)0 ~ 200 Kbps (adaptive)300 ~ 460800 bps (adaptive)
Optical Isolation/2500V (RS485) | 12KV ESD2500V (RS485) | 12KV ESD2500V (RS485) | 12KV ESD
Node CapacityEach RS485 port supports a maximum of 32 nodes

Hardware Interface
Interface StandardCompliant with EIA/TIA RS485 Standard
Physical ConnectionRS485 Pluggable Screw Terminals
Communication Performance
Baud Rate300 ~ 460800 bps (Self-adaptive)
Operating ModeRS485 two-wire (A, B), half-duplex transparent transmission
Node CapacityEach RS485 port supports up to 32 nodes
Max Distance1200 meters (@9600bps); The higher the rate, the shorter the distance
Transmission MediumNormal parallel cables / twisted-pair cables
Power & Environment
Input PowerDC 9V ~ 24V
Optical IsolationPhotoelectric isolation circuit
Operating Temperature-45°C ~ +85°C
Humidity< 95% RH (Non-condensing)
Massive Star Topology Expansion
  • The 8CH-HUB-RS485 is an industrial-grade active isolated Hub/Splitter/Repeater designed to handle high-density data acquisition networks.
  • It expands 1 master RS485 port into 8 independent slave branches, enabling engineers to deploy massive and fault-tolerant star topologies.
Fail-Safe Isolation for SCADA Systems
  • Features critical 2500V photoelectric isolation between the master and all 8 slave channels, successfully localizing severe electrical faults.
  • It features a self-adaptive baud rate engine (up to 460800bps) and pluggable screw terminal power inputs (DC 9~24V), making it the ultimate cost-effective solution for IoT gateways and intelligent instrument monitoring in heavy industry.
📥 Documents & Manuals

[User Manual] Valtoris 8CH-HUB-RS485 Installation Guide →

📝 Download A&E Spec Sheet (.doc)

Technical FAQ & Troubleshooting

Does the 8CH-HUB-RS485 support protocol conversion?
No. This device is a pure physical layer (OSI Layer 1) active signal repeater and splitter. It ensures zero-latency transparent transmission but does not convert protocols. The master and all 8 slave branches must operate using the exact same protocol (e.g., Modbus RTU) and baud rate.
How many total devices can I connect to this 8-port hub?
Each of the 8 isolated RS485 slave ports acts as its own independent bus segment and can support up to 32 nodes. Therefore, a single 8CH-HUB-RS485 can theoretically aggregate signals from up to 256 end devices (8 branches × 32 nodes) back to your single master controller.
Where should I place the 120Ω termination resistors?
In a star topology enabled by this hub, you are creating 8 distinct RS485 networks. You only need to place a 120Ω termination resistor at the very last device on each of the active branches. The hub internally manages the termination on its side.

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