GreenConnect - 8 Channel Modbus Hub - Convert Daisy Chain to Star Topology

GC-MH8 — 8-Channel Opto-Isolated Modbus RTU Hub

Built for Reliability. Designed for Installers.

One shorted wire shouldn’t take down your entire Modbus network. The GC-MH8 converts a fragile, daisy-chained RS-485 trunk into eight individually opto-isolated branches — so a fault, surge, or miswire on one device stays on that device, and the other seven keep running. It’s the rugged, install-anywhere hub that makes large Modbus RTU networks easier to build, troubleshoot, and trust.

Why installers choose the GC-MH8

• ✓Opto-isolated on every channel. Optical isolation on all 8 branches protects your BMS from shorts, surges, ground loops, and wiring faults. Problems stay contained instead of cascading across the network.
• ✓Star topology made simple. Turn a daisy chain into a clean 8-branch star — easier to wire and far easier to troubleshoot. Isolate any single branch without hunting the entire loop.
• ✓One network, one address space. All 8 branches share the same Modbus RTU network, so integration stays simple. No extra gateways, no re-addressing.
• ✓Room to grow. Supports up to 247 Modbus RTU devices across the network (per the Modbus specification).
• ✓Integrated 5 A circuit breaker. Built-in overcurrent protection guards the hub and your network — and resets without tools or spare fuses.
• ✓Push-in DIN-rail terminals. Fast, vibration-resistant push-in connections. No screw terminals to loosen, back out, or retighten in the field.
• ✓Installs in minutes. DIN-rail or wall-mount enclosure with clearly labeled connections and cable glands. Land your wires, apply power, and get to work.
• ✓Built to last. Industrial-grade enclosure and components stand up to tough BMS and field environments.

Specifications at a glance

Ideal for

Building management systems (BMS), HVAC and VAV controls, building automation, energy management, and any RS-485 Modbus RTU network where reliability matters.

🇺🇸  Assembled in America