EBYTE E810-R21 Industrial 2way Cache Type RS485 to 1way RS485 Hub DC 9~40V Optical Isolation Multi to one Hub ESD Protection - IOT Module Shop Manufacturer Factory – Ebyte Official Store - IoT Module Manufacturer

EBYTE E810-R21 Industrial 2way Cache Type RS485 to 1way RS485 Hub DC 9~40V Optical Isolation Multi to one Hub ESD Protection

$13.99

Shipping calculated at checkout.

The Ebyte E810-R21 is an industrial-grade 2-way to 1-way RS485 buffered isolation repeater featuring DC 9~40V wide voltage input, industrial EMC level 3 protection, photoelectric isolation, and plug-in terminal blocks. Parameter... Read more

Three Protections: The shell adopts three-proof coating, which is Anti-Fungal, Anti-Humidity, and Anti-Salt Spray.

Shipping: Free Air Shipping Over $89.99(China Post only)If the China post cannot deliver, other logistics need to pay extra postage delivery

Ship From: China EBYTE Manufacturer Factory

Bulk Purchase Tips: Please confirm the firmware version of the test sample with the salesperson before purchasing

Order today. Get it and , hoursminutes
Out of stock
SKU: E810-R21N/ATags: DC 9~40V, New products, RS485, RS485 HUB

Guaranteed Safe Checkout

paypalvisadiscovermaestroamerican express

Every day, EBYTEIOT serves hundreds of clients worldwide, ensuring that we always remain responsive.

Free Shipping Terms:  

1、Free shipping for orders over $89.99 and under 1500g.

2、Orders over 1500g are not eligible for free shipping. Due to thin profit margins and high international courier costs. shipping fees shall be borne by customers.

3、Orders containing fiberglass antennas, magnetic base antennas or power supply modules are not eligible for free shipping (overweight, magnetic or battery-equipped goods).

 

Total time = processing time + shipping time (shipping time is business days)

Processing time = the time between placing an order and us shipping it.

Shipping time = the time it takes for your order to be shipped and delivered to you.

Processing time: 7 working days

Shipping time: 7-30 working days by China Post Air Mail.

We offer express delivery via DHL, FedEx, UPS and more. Extra shipping fees apply: https://ebyteiot.com/products/ebyte-dedicated-link-for-paying-postage

 

Important Reminder:

(Shipment may take several months at maximum due to uncontrollable factors including wars, geological disasters, bad weather and customs clearance.)

 

Please be advised that we do not deliver to

  • Cuba
  • Islamic Republic of Iran
  • Democratic People's Republic of Korea (North Korea).
  • Sudan
  • Syria
  • Venezuela
  • Yemen
  • Colombia
  • Israel

We apologize for any inconvenience this may cause.

 

Cancel order

We accept order cancellations before the product ships. If your order is cancelled, you will receive a full refund. If the product has already been shipped, the buyer can initiate a return or refund request within 30 calendar days of receiving the goods.


Returns

We accept product returns. Customers have the right to request a return within 30 days of receipt of the product. To be eligible for a return, your item must be unused and in the same condition you received it. It must also be in its original packaging. To complete your return, we require a receipt or proof of purchase.

If the return is caused by the consumer, the consumer will bear the shipping costs. The exact cost depends on the courier company you choose.

If the product is damaged or unusable due to our fault, such as product or transportation reasons, please contact EBYTE: ebyteiot@cdebyte.com. After communication with our technical staff, we will arrange for a reissue or refund.


Refund

Once your return has been received and inspected, we will send you a delivery notification via email. We will also notify you of approval or rejection of the refund. If you're approved, your refund will be processed and automatically credited to your credit card or original payment method within 15 business days.


Contact

Contact our customer service at ebyteiot@cdebyte.com.

Tel: +086 028 61543675

Return address: Building B5, No. 199, West District Avenue, High Tech West District Chengdu, China.

 

Auto-download documents via Ebyte official website link:

The Ebyte E810-R21 is an industrial-grade 2-way to 1-way RS485 buffered isolation repeater featuring DC 9~40V wide voltage input, industrial EMC level 3 protection, photoelectric isolation, and plug-in terminal blocks.

Parameter Name Parameter Value Description
Data interface RS-485 Standard RS-485 interface standards
Baud rate 1200 ~ 115200 bps Configurable serial transmission speed
Working voltage DC 9 ~ 40V Wide voltage input support
Protection level Industrial EMC Level 3 High reliability against harsh interference
Isolation voltage 1.5KV Photoelectric isolation barrier
Electrostatic protection level Contact 4KV, air 8KV ESD protection for field deployments
Storage space Single channel host 3k Byte Buffered caching capability
Expansion channels 2-way RS-485 host Multi-to-one repeater configuration
Product size 100 x 54 x 32 mm Compact rail-mounted enclosure

 

Parameter name Parameter value Description
Common parameters Data interface RS-485 interface
baud rate 1200~115200bps
data bits 8 bits
Stop bit 1/2 digit
Check digit None/Odd/Even
storage space Single channel host 3k Byte
Working voltage DC 9~40V
Protection level Industrial EMC Level 3
Isolation voltage 1.5KV
Electrostatic protection level Contact 4KV, air 8KV
pulse wave surge Differential mode 1KV, common mode 2KV
Working temperature and humidity -40~85℃, 5%~95% (no condensation)
Storage temperature and humidity -40~105℃, 5%~95% (no condensation)
Ground terminal support
difference parameter Expansion channels 2-way RS-485 host
Product size 100×54×32mm
Product weight 70±5g
Interface standards 5.08mm copper pin plug terminal

    Industrial Grade RS485 Repeater8 reasons to choose a repeaterCached RS485 HubSupports multi-host gatewayDC 9~40V Wide Voltage SupplyPower + Signal Double isolationESD protectionThree ProofingsGuide rail and positioning hole installationHigh-speed bidirectional transmissionProduct SizeCommunication Connection DiagramApplication Scenarios

    Communication Converter

    Practical Application Scenarios

    1. Multi-Master Solar Photovoltaic Plant Monitoring Networks

    In large-scale solar PV power monitoring systems, dual supervisory control and data acquisition (SCADA) master units often need to poll a single string of RS485 field inverters. By deploying the E810-R21 hub, engineers can reliably merge two master controllers into one unified RS485 slave line, utilizing 3k Byte single-channel caching to prevent data collision and command corruption.

    2. Industrial Substation Power Meter Data Aggregation

    Power distribution cabinets and high-voltage substations suffer from severe electromagnetic interference (EMI) and transient surges from lightning strikes. Integrated between smart electricity meters and data acquisition gateways, this hub leverages industrial EMC level 3 protection, 1.5KV optical isolation, and DC 9~40V wide voltage input to safeguard downstream master units from electrical damage.

    3. Smart Factory Distributed PLC Polling Bus Extension

    Factory automation plants often require extended multidrop serial networks where signal attenuation and reflection degrade communication integrity. The buffered isolation repeater acts as a signal booster and splitter, cleansing the RS485 waveform and allowing safe expansion of serial nodes across noisy manufacturing floors without configuration overhead.


    FAQ Section

    1. Does the E810-R21 hub require software configuration or driver installation?

    No configuration is required. The device operates strictly as a hardware-level transparent transmission repeater, supporting plug-and-play operation for standard baud rates between 1200 and 115200 bps without any software protocol adjustments.

    2. How does photoelectric isolation protect connected automation equipment?

    The internal photoelectric isolation technology creates a 1.5KV galvanic barrier between the master and slave RS485 ports. This completely breaks ground loops and blocks high-voltage surges or static discharges from propagating backward to expensive core controllers like PLCs or industrial computers.

    3. What makes the 3k Byte cache storage beneficial for multi-host communication?

    The single-channel host cache provides a 3k Byte storage buffer that manages data flow discrepancies when dual master devices send polling requests concurrently, preventing packet loss and ensuring orderly queue transmission over the single-way RS485 link.


    Disclaimer:This product is strictly prohibited for use in military applications and scenarios related to life safety. The user shall be fully liable for any unauthorized use.

    Sunday,Monday,Tuesday,Wednesday,Thursday,Friday,Saturday
    January,February,March,April,May,June,July,August,September,October,November,December
    Not enough items available. Only [max] left.
    Add to WishlistBrowse WishlistRemove Wishlist
    Shopping cart

    Your cart is empty.

    Return To Shop

    Add Order NoteEdit Order Note
    Estimate Shipping
    Add A Coupon

    Estimate Shipping

    Add A Coupon

    10%OFF Code: ebyteiot ,Available for any order ,Coupon code will work on checkout page

    EBYTE E810-R21 Industrial 2way Cache Type RS485 to 1way RS485 Hub DC 9~40V Optical Isolation Multi to one Hub ESD Protection

    $13.99