Q4: In high-EMI environments, if my two master stations have different ground potentials, will it crash the RS485 bus?

A: We built this hub to eliminate that very risk. All the RS485 ports on the device feature industrial-grade optical isolation and surge protection. This physically decouples the ground loop currents between the master stations and the slaves. Standard shielded twisted-pair (STP) cables give reliable, continuous telemetry in the most severe electrical environments.

Industrial Active 2-Ch Cache-type RS485 Hub

Name: Industrial Cache-Type RS485 Hub & Multi-Host Node | Valtoris
SKU: IoT-IC103
Price: 28.99 USD
Availability: InStock

Engineered to resolve multi-host serial communication conflicts, this Industrial Cache-Type RS485 Hub efficiently routes data between two masters and one slave.

Part No. 2CH-HUB-RS485

sku : IoT-IC103

INSTANT QUOTE

Industrial Cache-Type RS485 Hub

A specialized 2-channel active caching hub designed to resolve multi-host communication conflicts and support complex routing topologies.

Multi-Host Routing Topologies

Supports seamless RS485 network relaying. Flexibly configure the hub for 2-master to 1-slave polling, or 1-master to 2-slaves data routing.

Supports 2 master 1 slave or 1 master 2 slaves

Independent Channel Configuration

Each RS485 channel operates entirely independently. You can set different baud rates and serial parameters for each port, enabling legacy devices to communicate across mismatched networks.

Each RS485 channel is independent connection diagram

Zero Data Collision Polling

Eliminate RS485 bus congestion. The active hardware cache queues simultaneous requests from multiple masters, ensuring responses are routed back without data collision or timeout errors.

Communication between two master and slave should not conflict

Overcurrent & Surge Protection

Built for harsh industrial deployments, featuring robust internal protection circuits and replaceable fuses to safeguard your equipment against voltage spikes.

Overcurrent protection power supply with added fuse

Visual Parameter Configuration

Includes a dedicated Windows utility tool. Easily configure advanced features like address masks, whitelists, and caching intervals directly from your PC.

Hardware Interfaces & DIN-Rail Mount

Compact design featuring a standard 35mm guide rail buckle. Pluggable screw terminals and clear LED status indicators make field wiring and maintenance highly efficient.

Interface introduction and wiring diagram

Hub Selection Guide

Model	2CH-HUB-RS485 (This Model)	4CH-HUB-RS485	4CH-HUB-RS232/485	8CH-HUB-RS485
Function	2-channel caching hub	4-channel isolated hub	4-channel isolated hub	8-channel isolated hub
Physical Interface	*RS-485 3PIN terminal 3**	RS-485 2PIN terminal *5	RS-232 DB9 1, RS-485 2PIN 5	RS-485 2PIN terminal *9
Baud Rate	1200 ~ 460800 bps	300 ~ 460800 bps (adaptive)	0 ~ 200 Kbps (adaptive)	300 ~ 460800 bps (adaptive)
Optical Isolation	/ (Built-in Overcurrent)	2500V (RS485) \| 12KV ESD	2500V (RS485) \| 12KV ESD	2500V (RS485) \| 12KV ESD

Hardware Interface
Interface Standard	Compliant with RS485 standard
Physical Connection	RS485 screw terminals
Communication Performance
Baud Rate	1200 ~ 460800 bps
Operating Mode	RS485 two-wire (A, B), half-duplex transparent transmission
Node Capacity	Each RS485 port supports up to 32 nodes
Max Distance	1200 meters (@9600bps); The higher the rate, the shorter the distance
Transmission Medium	Normal parallel cables / twisted-pair cables
Power & Environment
Input Power	DC 9V ~ 24V
Operating Temperature	-45°C ~ +85°C
Humidity	< 95% RH (Non-condensing)

Resolve Multi-Host Data Conflicts

The 2CH-HUB-RS485 is an active caching hub engineered to prevent data collisions when two master stations poll the same slave simultaneously.
It independently collects data, identifies the originating master station, and safely routes the telemetry back without dropping packets.

Baud Rate Bridging & Advanced Filtering

1 Master to 2 Slaves: The RS485 interfaces are fully independent (3 interfaces). Easy connection of devices with different baud rates (1200 to 460800bps).
Address Filtering: The built-in address mask and whitelist functions enable you to filter Modbus reply commands, significantly reducing unnecessary bus load.

📥 Documents & Manuals

[User Manual] Valtoris 2CH-HUB-RS485 Installation Guide →

📝 Download A&E Spec Sheet (.doc)

Technical FAQ & Troubleshooting

Will the “active caching” mechanism cause severe polling latency or timeout errors on my SCADA system?

Nope. 2CH-HUB-RS485 has microsecond queuing at hardware level. When two master stations poll the same slave simultaneously, the hub caches one request instantly and then routes it sequentially in under a second. For normal industrial polling rates this nanosecond delay is totally invisible to the master station.

Is this hub strictly limited to Modbus RTU, or can I use it with custom serial protocols?

The device operates on standard RS485 half-duplex transparent transmission at the physical layer. It seamlessly transmits Modbus RTU as well as most standard serial payloads. However, advanced features like Address Filtering are specifically optimized for Modbus frames.

With independent baud rates across three ports, do I need to configure complex hardware DIP switches in the field?

No. We got rid of the tiny DIP switches for easier field deployment. The device comes with a dedicated Windows based Cache Hub Tool. Connect your laptop via USB to RS485 adapter to visually configure baud rate, data bits, parity, and whitelist settings for each port independently.

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