10% OFF!!! Buy Industrial isolated Active RS485 repeaters RS485 Amplifier only US $16.20.

Industrial isolated Active RS485 repeaters RS485 Amplifier

Price US $16.20 18.00 / 1 piece 10% OFF
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Specifications

Brand Name : Jedrek
Model Number : RS485 Amplifier
Interface Standard : EIA/TIARS-232C, RS-485
RS232 : 300bps-120kbps
RS485/RS422 : 300bps-1Mbps
RS-422/485 : 0-1.2Km
NODE : 32
Isolation voltage : 1500V
Lightning protection voltage : 6-7V
Lightning protection capacity : 600W/ms

Details

 

Industrial Active RS485 repeaters RS485 Amplifier isolated 

485 Repeater Product Description:

Product Description
Active Isolated RS485 repeaters ( 
485amplifiers   485 isolator extender ) is a professional place for the high demands of the development of a customized product . Product is compatible with industry standard RS485 . RS485 differential signals used for communication to extend communication distance and communication isolation , you can extend the RS485 signal about 1,500 meters or additional 256 nodes. While DC-DC power supply isolation , communication signals , such as multiple isolated RS485 communications to provide effective protection . Repeater use simple, only the repeater access communication network, does not require the use of additional control data flow , the converter automatically control the flow of data transmission and reception . The communications transmission process is completely transparent. The product is in accordance with the concept of industrial control standards for the design, supply completely isolated ! Communication is completely isolated ! Interference ability , long transmission distance , high speed , stable characteristics. Is widely used in attendance machine, IC card charging systems, industrial automation and control systems, card access control systems, parking systems, automated banking system , bus charging system , canteen Canteen system , highway toll station systems. RS485 communication applications is a relatively special applications, often must be combined with on-site environment , cabling, electrical equipment make the final adjustments. So buy site RS485 product users, the practical application of what problems can contact us promptly , we will provide appropriate technical support services !

Features:

1 , active isolation, built-in industrial grade DC-DC isolated power modules to achieve electrical isolation between portsFrom ;
2 , communication isolation , using imported fully isolated 485 chip to ensure communication is completely isolated, anti-interference ability , communication distance ;
3 , professional interface data flow control technology , automatic identification and control data transfer direction ;
4,1500 W surge protection , 15KV ESD protection , 2500V communication isolation ;
Communication parameters:
Meet : EIA RS-485 standard
RS-485 signal : A +, B-
Work:Asynchronous transmission , point to point , multipoint, two -wire half duplex
Transmission media:Ordinary wire , twisted pair or shielded cable is recommended to use shielded twisted pair wire or dedicated communication
Baud rate : 300 ~ 115200bps, automatically detecting the serial signal baud rate
Direction control: automatically determine the direction of automatic control of data transmission
Transmission distance: 1500 m
Communication protocol: transparent transmission
Interface protection : 1500W surge protection , 15KV ESD protection , 2500V communication isolation , anti-lightning
Working environment : 0 ~ 60 , relative humidity 5 % to 95%
Cascade : RS485 side can cascade up to enhanced RS485 devices 256 . ( Practical applications can depend on the number of cascaded devices used in other devices
485 chip type, the current general 485 chips can be cascaded to 32 communication nodes , enhanced cascade up to 256 communication nodes. Of course , the practical application
Also the number of nodes that can be achieved and communications environment , wire, communication distance and communication rate have a relationship ) .
Power supply:
Input Power : DC9 ~ 24V wide range DC voltage input
Power consumption: about 40mA static and dynamic 60mA
Dimensions:
Length × width × height : 82 × 50 × 32mm
Case : high quality plastic shell , insulation high safety factor
Color: Light Gray
Weight: 68 g

A , 485 Wiring Precautions :

1.485 communication lines must be shielded twisted pair , the best multi-strand spare , total length does not exceed 1200 meters.
2 wiring as far away from power lines , and power lines not parallel , but not bundled together.
3.485 bus must be a hands -style bus architecture , and resolutely put an end to star connection and branching connections.
4 out of 30 controllers or lines longer than 500 meters , 485 repeater must be used .
5 AC-powered equipment and chassis ground must be true , but a good grounding .
6 shielded cable to ground all 485 devices connected to GND .
7 In the last one 485 + 485 , and 485 devices - on and connected 120 ohm termination resistors.
Communication using RS-485 bus wire selection requirements:
Use two -core shielded twisted pair
Copper , diameter 0.5 to 0.75 mm2 ,
Impedance of 38 to 88 ohms / km ,
30 to 50 nF capacitance / km ,
Twist pitch of 20 mm 2 core shielded twisted pair ( if the line distance of not more than 500 meters
The standard line can be reduced , but it must be a twisted pair
Second, the system bus :
By two or more inter- connected device with a physical component , allowing up to 128 articulated bus devices without repeater in the case of bus length
Not more than 1200 meters.
Third, the system bus should be no bifurcation , such as branch unavoidable , you must meet the following three requirements:
branch lengths of not more than 10 m;
bus length and no more than 800 meters ;
The total number of branch lines shall not be more than 50 devices .
All communication signal lines should be kept away from sources of interference, signal lines should go weak wells , not with strong electricity ( such as the 220 -volt residential power ) or radio frequency signal lines
( Such as CATV, large-signal audio cable ) and parallel lines , and parallel lines if , distance should be greater than 0.5 m .
all lines or contacts to be welded tight connection Luo Sika , and a waterproof and moisture treatment , for example, the contact will be welded with waterproof glue
Belt wrapped tight or sealed with epoxy resin .
Fourth, the signal common ground :
the same for all devices on a network segment must have a uniform signal ground to avoid common mode interference .
centralized power, the same segment of all power ( including communications equipment, its own power supply ) directly connected with the negative pole of the DC component common signal ground ,
At this point the signal ground that the DC power ground.
Single- family independent power supply, put on a different subnet to all bus devices ( black line ) pin connected together, which formed a common signal ground.
Bus using wire recommended selection

Recommend several debugging method :

First make sure the wiring is correct equipment and strict normative :
1, the same GND method: using a cable or shielded cable to the GND of all 485 devices connected together, so that all devices to avoid affecting the communication between the electric potential difference .
2 , the terminal resistance method : In the last one of the 485 + 485 devices , and 485 - and connected on 120 ohm termination resistors to improve the communication quality.
3 , the middle segment disconnect method : By disconnecting from the middle to check whether it is long distance communication device load too much damage to a device on the whole the impact of communication lines and other reasons .
4 , a separate cable method : Simple temporarily pull a separate line to the device , which can be used to rule out whether the wiring caused the communication failure .
5 , the replacement converter method : carry several converters , so you can rule out whether the converter quality issues affecting the communication quality.
6 , notebook debug way: first, to ensure their own portable laptop is the normal communication equipment, replacement client computers to communicate , if you can , then the client computer's serial port may be damaged or injured.

Note This product is no output load resistance , load resistance due to the use of different occasions , when using please bring your own load resistor , typically 120 ohms.

 

 

 

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GUARANTEE & WARRANTY:

  • 100% fully checked and QC passed from factory.  
  •  Original packaging and accessories produced by the manufacturer.
  • One Year Warranty from the date of shipment

Payment:

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shipping&handing

  • We Ship to Worldwide Except APO/FPO
  • We only ship to confirmed order addresses. Your order address MUST MATCH your shipping address.
  • Delivery Time:
  • SERVICE TRANSIT TIME is provided by the carrier and excludes weekends and holidays. Transit times may vary, particularly during the holiday season.
  • If you have not received your shipment within 30 days from we send it out, please contact us. We will track the shipment and get back to you as soon as possible with a reply. Our goal is customer satisfaction!
  • Due to stock status and time differences, we will choose to ship your item from our first available warehouse for fast delivery.
  • We ship to Worldwide, and the Approx Delivery Time is referred as below:

Item

Approx. Delivery time

UPS,DHL,FEDEX,TNT

2-5 working days

EMS

5-8 working days

China Post Air Mail

 

US, UK, AU, Singapore,etc.

12-20 working days

Canada,New Zealand,etc.

15-22 working days

India, Germany,Israel,Spain, etc.

may take up to 4-6 weeks due to strict Custom Inspection

Russia, Brazil,Italy, France, Eastern Europe,etc.

may take up to 6-8 weeks due to strict Custom Inspection

Important duties:

  • Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyers? responsibility
  • You need to check this with your customs office to find out what these additional costs will be prior to buying
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Refund &Return:

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  • you have 14 days to return it from the date it was received. Please contact us in the 14 days. If this item is in your possession more than 14 days, it is considered used and we will not issue you a refund or replacement. hope you can understand.
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  • We will refund you upon receipt of the item in its original condition and packaging with all components and accessories included. You also can choose to have a replaceme

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