Hid Wiegand Reader Wiring

[Terina]

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Dahua access control device is designed to interface with third-party access control device using Wiegand protocol. The main objective is to connect devices to electronic entry systems via a specific protocol language.

This page will provide you instruction of how to setup Third-party Access Controller with Dahua Card Reader.For instruction of how to wire Third-party card reader to Dahua Access Controller, please click here.

In this article, we are testing Third Party access controller with some of our card reader type. DHI-ASR1200 and DHI-ASR-1100.Below are the wiring diagram to connect the card reader using Wiegand Protocol:

The Operation of LED is controlled by the Access Controller, the LED operation may vary depending on the Access Controller software. The normal behavior, the LED on card reader will turn Green to indicate that card is read and privileged.

4. Connect your access controller device to the network and access it from the computer in the local network. Follow the manufacture user guide to setup the controller, create user, assign permission, etc.

5. Once the access controller is configured properly, the reader is ready to be tested. Scan your card and you should hear the beeps. For this example, we wire a LED light indicator to connect to Alarm output interface from access controller. When the card is read and access is permitted, light turns Green.

If you look at manufactures of composite access control cable such as Belden, General Cable, Superior Essex, and others manufactures usually they make the card reader cable with twisted pairs. Also several card access manufactures such as DSX, Kantech, and others recommend twisted pairs in their literature.

Twisted cat5e and cat6 are not good to be used for wiegand readers. The twist by the data can cause problems with the data packets. If you have to use cat5e or cat6, make sure to have the data running on two different twists. Usually the longer the run, the bigger chance of there being reader issues.

Do you have any documentation to site to back up your claim? Why are all the manufatures I liked to in my original post using sheidled twisted pair wiring? I understand that the HID reader spec a 5c wire but is that a minimum requirement? Wouldn't a twisted pair shielded be even better? Several manufactures also spec twister pair wiring and twisted pair shielded wiring.

Common mode rejection is the method that UTP uses to reduce noise. But unlike a shield, you need equipment on both ends to get the benefit. Plus the signals and their inverse must be put on the same pairs.

If there were only 4 wires, I would say that you could use STP, Sheilded Twisted Pair, without incident, by assigning each pair to a single signal, but you have 5 and so would have to double one up...

I would say if the cable needs nothing besides the 3 wires (two signals and shared ground), then using STP and by putting each signal on their own pair as well as the ground should perform well. It also halves the resistance of the conductors. Note that this is not using any differential signaling, and the effect of the twisted pairs are effectively eliminated by putting the same signal on both wires.

While I cant say for sure re HID. 3 manufacturers that I am certified with all insisit that you dont use twisted cables. As a matter of fact, one of them, wont even work on trouble shooting reader issues if you use cat5

I'd be interested in this as well - I'm spec'd to wire a site for HID readers (I believe mostly MiniProx and maybe a few ProProx keypads) and they have me using Cat5e, would be good to know before we start if I have to have them change the cable spec.

Just a couple of thoughts here. Wiegand was invented some 50 years ago before Cat 5 etc. I think you will find that each manufacturer uses their own wiring specification, and most if not all have settled over the years on the accepted "wiegand" standard, 6 conductor non-twisted, overall shield.

CAT 5 or 6 is designed to extend the ability of the cable to transmit data using tighter winding, the winding canceling out interference. The issue is the power. You will drop too much voltage using 24ga wire to properly power your readers.

I would consult the manufacturers documentation or tech support before using CAT anything. We have tried it in elevators and it did not work well at all. We had to use a Wiegand extender down to the elevator car and standard 6 conductor with an overall shield.

Wiegand is a technology invented in the 1970s by John Wiegand that became an integral part of access control systems in the 1980s. While the term Wiegand actually refers to a variety of things (the Wiegand effect, the Wiegand wiring standard, and Wiegand protocol), this article focuses on the Wiegand wiring standard. This standard explains how an access control reader communicates with a door controller.

The reader then converts that series of 1s and 0s into electrical pulses per the Wiegand interface standard, which is made up of 3 wires: a common ground, DATA0 (aka Data Low) and DATA1 (aka Data High).

The OSDP reader sends card data to the controller and the controller can also communicate with the reader to monitor the state of the OSDP reader and to detect if the reader wiring has been tampered with.

The Verkada access door controllers supports both Wiegand readers and the Verkada AD31. As shown, each door cassette on the AC41 has connection points for Verkada Readers using OSDP and Wiegand readers.

This is a quick reference for the standard wiring of IBC readers. If you have a non-standard reader, or your wire colors or pinouts do not match anything described here, please contact IBC for wiring information. It is possible you could have a special reader supplied by one of our OEM's, and using the following wiring diagrams could be incorrect and possibly damage your reader. If you're not positive whether your reader is standard or not, contact us first before using the following wiring descriptions.

The Wiegand interface is a de facto wiring standard which arose from the popularity of Wiegand effect card readers in the 1980s. It is commonly used to connect a card swipe mechanism to the rest of an access control system. The sensor in such a system is often a "Wiegand wire", based on the Wiegand effect, discovered by John R. Wiegand. A Wiegand-compatible reader is normally connected to a Wiegand-compatible security panel.

The high signaling level of 5 VDC is used to accommodate long cable runs from card readers to the associated access control panel, typically located in a secure closet. Most card reader manufacturers publish a maximum cable run of 500 feet (150 m). An advantage of the Wiegand signalling format is that it allows very long cable runs, far longer than other interface standards of its day allowed.

The communications protocol used on a Wiegand interface is known as the Wiegand protocol. The original Wiegand format had one parity bit, 8 bits of facility code, 16 bits of ID code, and a trailing parity bit for a total of 26 bits. The first parity bit is calculated from the first 12 bits of the code and the trailing parity bit from the last 12 bits.[3] However, many inconsistent implementations and extensions to the basic format exist.

Many access control system manufacturers adopted Wiegand technology, but were unhappy with the limitations of only 8 bits for site codes (0-255) and 16 bits for card numbers (0-65535), so they designed their own formats with varying complexity of field numbers and lengths and parity checking.[4]

The physical size limitations of the card dictated that a maximum of 37 Wiegand wire filaments could be placed in a standard credit card, as dictated by CR80 or ISO/IEC 7810 standards, before misreads would affect reliability. Therefore, most Wiegand formats used in physical access control are less than 37 bits in length.

A wireless bridge that enables you to wirelessly connect Wiegand-based access control systems, which are often used in security applications. Wiegand systems generally involve cables and wiring to transfer data between a card reader (like an access card scanner) and the control panel that decides whether to unlock a door.

The bridge consists of two parts: a transmitter and a receiver. The transmitter (Remote Interface) is connected to the card reader, which reads access cards or key fobs. When a card is read, the transmitter sends the data wirelessly to the receiver. The receiver (Controller Interface), in turn, is connected to the control panel and sends the data to it, just as if it were wired directly to the card reader.

The benefit of using the Sure-Fi Wiegand Kit is that it eliminates the need for complex and potentially expensive cabling between card readers and the control panel, especially over large distances or through challenging environments. It can be particularly useful in retrofitting older buildings where adding new wiring would be difficult or intrusive.

Most Wiegand tag readers include several wires in the bundle, where some connect to the ESP microprocessor (green and white, the two DATA lines), others connect to the 5VDC power supply (Vin/red and GND/black), while two others serve to change the color of the LED on the reader or to beep the beeper/buzzer on the reader. These two lines typically react when connected to the GND ground connection point, FYI.

Using a combination two-relay or four-relay board with embedded ESP microprocessor, you can save some wiring effort. These boards are typically used for sprinkler controllers or lighting controllers, or even gate/latch/hasp controllers. If you hard-code a list of two or three or four tag IDs in your ESPHome YAML, then your device can function to open/unlock/lock even if the LAN or Home Assistant server is down or offline.

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