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Dual Isolated Half-Duplex RS-485 Repeater


The two sides of the communication and the power supply adopt triple-layer
isolation design , which can provide RS485 clean transmission completely
isolated from the system power supply

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AR-485REP-V3 Features




  • 9-24VDC wide input, Triple-Zone DC/DC power isolation, built-in antisurge, static electricity, and lightning protection.
  • The signal isolation strength of automatic direction detection can reach 3.0KV.
  • Fully transparent data transmission; Support communication protocols such as MODBUS RTU and encrypted transmission.
  • Industrial-grade RS-485 signal repeater and amplifier distance extender.

RS485 wiring precautions


  1. 485 communication lines must use shielded twisted-pair; all 485 equipment on the lines must be connected to same GND ground.

  2. The theoretical length of 485 communication line should not exceed 1000 meters. According to actual experience and on-site environment, it is recommended that the total length should not exceed 500 meters, 485repeater should be added if it exceeds 500 meters.

  3. The theoretical maximum of devices on the 485 bus should not exceed 64; If it exceeds, a 485 repeater should be added.

  4. The 485 bus must be a hand-in-hand bus structure, and resolutely avoid the way of star and bifurcation connection.

  5. The 485 wiring should be as far away from interference sources as possible such as high-voltage power supply / electric mains / high-radio frequency signal cables, and not to be bundled together; if it is necessary to run with these cables in parallel, please add EMT conduit tube.


AR-485REP-V3 Specifications

Operating Voltage9~24VDC
rated power0.4W(9V/46mA:12V34mA:24V15mA)
Communication rate300-11500bps
Surge Protection3KV
Responsibility1-64 nodes
Communication distance0-1000 meters(theoretical value)
Housing MaterialABS
Dimension (mm)106.5(H)x66(W)x27.7(D)
Weight(g)approx. 50
Operation Temperature-20°C ~ +70°C

Datasheet / Manual

File NameVersionUpdated DateDownload
Full Catalogue
v2308082023-08-08 Download
Converter Series Catalogue
V180111 Download
AR-485REP-V3 Manual
V2208092022-08-09 Download
Full Catalogue
Converter Series Catalogue
AR-485REP-V3 Manual

How to Order


Since established in 1993, SOYAL Technology has been adopting the distribution policy of sales and after-sales service. Due to all SOYAL products are produced with high industrial-grade components, the users can use our products for more than 10 years, in which indicates SOYAL provides a reliable security system with trusted and long-term companionship.
In order to ensure long-term and high-quality after-sale services and maintenance, it is very important to carefully select distributors who can provide good installation and service. 
We would advise the customers to take after-sales service as the main consideration before purchasing to avoid any doubts about installation and after-sales service. 
In addition to physical distributors, SOYAL also made a variety of online teaching videos and Q&A to help customers quickly find answers as like 24 / 7 services. You are welcome to subscribe our training channel.

After Sales Service

SOYAL offer Standard Warranty and SOYAL Extended Warranty Program that can be listed below:

1. Standard Warranty is 12 months warranty against manufacturing defects is guaranteed since the date of shipment under the circumstances of non-natural disaster, damage, non- deliberate damage by people.

2. Extended Warranty Program is extended program of Standard Warranty to prolong the Warranty period in which divided into two different plans.

Plan 1. Directly Add Purchase

Purchase Extended Warranty by the time product is purchased.

Plan 2. Purchase Before Warranty Expires

Purchase the Extended Warranty before the original 12 months warranty expires. If you did not purchase the Extended Warranty when you purchase the product, you can enjoy an opportunity to purchase an extended warranty before the 12 months warranty expires.



Please refer to the following price list for the additional purchase fee required for the Extended Warranty of the two plans:

Extended Warranty Price List

Extendend WarrantyPlan 1. Directly Add PurchasePlan 2. Purchase Before Warranty Expires
Extended to 2  years warranty10% of the Unit Price15% of the Unit Price
Extended to 3  years warranty20% of the Unit Price25% of the Unit Price
Extended to 4  years warranty35% of the Unit Price40% of the Unit Price
Extended to 5  years warranty50% of the Unit Price55% of the Unit Price
Extended to 6  years warranty65% of the Unit Price70% of the Unit Price
Extended to 7  years warranty80% of the Unit Price85% of the Unit Price
Extended to 8  years warranty95% of the Unit Price105% of the Unit Price
Extended to 9  years warranty115% of the Unit Price125% of the Unit Price
Extended to 10  years warranty135% of the Unit Price145% of the Unit Price



Product Package ReferenceDimension(cm)


Inner Box


Outer Carton


Accessories Type

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