Hub RS485 industriel actif à 2 canaux de type cache

Conçu pour résoudre les conflits de communication série entre plusieurs hôtes, ce concentrateur industriel RS485 de type cache achemine efficacement les données entre deux maîtres et un esclave (ou vice versa). Il offre des configurations de vitesse de transmission indépendantes et un filtrage avancé des données pour assurer une intégration transparente de la télémétrie et l’intégrité des données au sein de réseaux SCADA complexes.

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INSTANT QUOTE

Fonction principale

Supporte le relais réseau RS485, 2 maîtres et 1 esclave / 1 maître et 2 esclaves

Schéma de connexion

Chaque canal RS485 est indépendant et les paramètres du port série peuvent être réglés indépendamment.

Support de montage sur rail

Supporte le rail de guidage standard de 35 mm avec une boucle de montage sur rail, facile à installer.

Introduction de l'interface

Présentation du produit

Dimensions générales

Guide de sélection des moyeux

Modèle

2CH-HUB-RS485

4CH-HUB-RS485

4CH-HUB-RS232/485

8CH-HUB-RS485

Présentation du produit

Concentrateur actif RS485 à 2 canaux

Concentrateur d'isolation RS485 actif à 4 canaux

Concentrateur d'isolation active RS485/232 à 4 canaux

Concentrateur d'isolement actif RS485 à 8 canaux

Interface physique

Port RS-485 Tête de bride 3PIN*3

Port RS-485 Tête de bride 2PIN*5

Extrémité RS-232C tête femelle DB9 (type trou)*1, port RS-485 tête à bride 2PIN*5

Port RS-485 2PIN tête de bride*9

Taux de transmission

1200~460800bps

300-460800bps (adaptatif)

0~200Kbps (adaptatif)

300-460800bps (adaptatif)

Protection contre l'isolement

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Tension d'isolation RS485 Tension d'isolation : 2500V Protection statique RS485 : 12KV

Tension d'isolation RS485 Tension d'isolation : 2500V Protection statique RS485 : 12KV

Tension d'isolation RS485 Tension d'isolation : 2500V Protection statique RS485 : 12KV

Paramètres d'interface

Bit de données 8 Bits de contrôle Aucun/Odd/Pair/Mark/Espace
Position d'arrêt 1/2

Nœuds de support

Chaque port RS485 prend en charge un maximum de 32 nœuds.

Distance de transmission

RS232C：15m ; RS485 : 1200 mètres (à 9600bps) ; plus la vitesse de communication est élevée, plus la distance est courte.

Support de transmission

Fil ordinaire, paire torsadée ou fil blindé

Méthode de travail

Demi duplex asynchrone

Consommation électrique

DC9-24V 12V@30mA

Température de fonctionnement

-45℃~+85℃

Humidité

<95%HR

Taille（Longueur x Largeur x Hauteur）

121mm * 72mm * 34mm

Interface standard

Compliant with RS485 standard

Physical interface

RS485 screw terminals

Baud rate

1200~460800

supported nodes

Each RS485 port supports up to 32 nodes

Communication distance

1200m (9600bps), the higher rate the shorter distance

Operating mode

RS485 two-wire (A, B), half-duplex transparent transmission

Power supply

DC 9~24V

Operating temperature

-45 ~ +85℃

Environment humidity

<95%RH

Transmission medium

Normal parallel cables/twisted-pair cables

The 2CH-HUB-RS485 is an industrial-grade, 2-channel active RS485 caching hub engineered specifically to resolve multi-host data conflicts. In standard RS485 networks, two host devices directly polling the same slave will cause inevitable data collisions. This caching hub independently collects data, identifies the originating master station, and safely routes the telemetry back without data loss.

Core Applications & Features

* 2 Masters to 1 Slave Topology: Allows two master stations to simultaneously schedule and read from a single RS485 slave station without data clashing.

* 1 Master to 2 Slaves (Baud Rate Bridging): The three RS485 interfaces are all completely independent. This allows for seamless communication even if the devices are running at different baud rates (1200 to 460800bps supported).

* Advanced Data Filtering: Built-in address mask and whitelist functions allow users to filter station addresses for Modbus reply commands, reducing unnecessary bus load.

* Visual Configuration: Comes with a dedicated « Cache Hub Tool » software for straightforward PC-based parameter management and diagnostics.

Q1: Will the « active caching » mechanism cause severe polling latency or timeout errors on my SCADA system?

A: 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 (1-2 requests per second for example) this nanosecond delay is totally invisible to the master station. You do not have to change the timeout thresholds on your system.

Q2: Is this hub strictly limited to Modbus RTU, or can I use it with custom serial protocols?

A: 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. If your project also requires converting these serial protocols to Ethernet TCP, we highly recommend pairing this hub with our [Industrial Modbus RTU to TCP Gateway]

Q3: With independent baud rates across three ports, do I need to configure complex hardware DIP switches in the field?

A: 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 to the device via USB to RS485 adapter to visually configure baud rate (1200~460800bps), data bits, parity and whitelist settings for each port independently. Every setup takes effect instantly and needs no coding at all.

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.

📥Documents

[User Manual] Valtoris-2CH-HUB-RS485 User Manual

 

 
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