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IoT, RS485 HUB
USR‑HUB104S Industrial Grade RS485 HUB
SKU: USR‑HUB104S
₹2,643.20
₹2240 + 18% GST
incl. GST
Availability: Available on backorder
Estimated Delivery: Estimated delivery in 2 to 4 weeks
For bulk orders or B2B inquiries, email us: sales@empere.in
USR-HUB104S Industrial Grade RS485 Hub (1 Master to 4 Slaves)
1 Master to 4 Slaves | 3kV Optical Isolation | ±15kV ESD & 600W Surge | 9–40V DC
The USR-HUB104S is a rugged, industrial-grade RS485 communication hub designed to expand a single RS485 master bus into 4 independent, optically isolated slave ports utilizing a star bus topology. Featuring up to 3kV (2500Vrms) optical isolation, ±15kV ESD protection, and 600W per-line lightning surge suppression, it eliminates ground loop interference and protects downstream PLCs, sensors, and meters across harsh industrial automation networks.
Channel Topology
1 Master to 4 Slaves
1 Master to 4 Slaves
Isolation Protection
2500Vrms / 3kV Optical
2500Vrms / 3kV Optical
Surge & ESD Rating
±15kV ESD | 600W Surge
±15kV ESD | 600W Surge
Supply Voltage
DC 9V to 40V (500mA)
DC 9V to 40V (500mA)
Transmission Speed
300 bps to 115.2 Kbps
300 bps to 115.2 Kbps
Node Capacity
128 Nodes / Channel
128 Nodes / Channel
| Product Model | USR-HUB104S (USRI-HUB104S) |
| Device Classification | Industrial 4-Port Isolated RS485 Hub / Repeater / Splitter |
| Interface Standard | Compatible with TIA/EIA RS-232 and RS-485 standards via industrial screw terminal blocks |
| Channel Configuration | 1-Channel RS-485 Master Input to 4-Channel RS-485 Slave Outputs (Star Bus Architecture) |
| Node & Network Capacity | Up to 128 nodes supported per individual RS485 channel; supports multi-node cascading and star-topology branching |
| Data Control & Protocols | Automatic data flow direction sensing; integrated serial port buffering; protocol-agnostic (Modbus RTU / ASCII / transparent) |
| Isolation & Surge Protection | 3kV optical isolation (2500Vrms, 500V DC insulation, continuous DC/DC converter); ±15kV ESD; 600W lightning surge protection per line |
| Transmission Range | 0 to 3 km (adaptive transmission distance based on baud rates from 115,200 bps down to 300 bps) over twisted pair or shielded cable |
| Status Diagnostics | 3 LED indicators: Power (POW), Data Transmit (TXD), and Data Receive (RXD) |
| Mechanical & Dimensions | 100 x 54 x 32 mm with integrated back clamp and positioning mounting holes |
| Operating Environment | Operating temperature: -20°C to +7 |
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