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Changing Security Expert readers from RS-485 to Wiegand

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Changing Security Expert readers from RS-485 to Wiegand

Captain BillNeville Captain
‎2019-07-11 09:52 PM

Last Updated: Kirk AdamSteele Kirk ‎2021-09-12 10:42 PM

Warning

Hazard of Electric Shock: Remove all power from all devices before removing any covers or doors of the system. Disconnect power at the device and at the power source.

Electrostatic Discharge Required: Always discharge static electricity from your person by touching metal prior to handling any hardware. Failure to do so may result in damage to devices.

Issue

A Security Expert reader that supports Wiegand and RS-485 is wired for Wiegand. It is not working. It only works on RS-485.

Product Line

Security Expert

Environment

Security Expert Smart Card Readers which support both 125Khz and 13.56Mhz (SX-DRD-xx, SX-DRK-xx, SX-RK-xx)

Cause

Tried to use a Smart Card Reader wired for Wiegand after it had been connected by RS-485 to the controller.

Resolution

Once a Security Expert Smart Card Reader is used in an RS-485 configuration it will not work in Wiegand configuration until it has been re-programmed with a configuration card designed for that purpose. The configuration card  (SX-ISO-CONFIG) must be purchased through Schneider Electric. See the Security Expert Credentials Order Form for details.

 

This is because RS-485 is a two-way communication, intelligent wiring protocol. Once the reader is set in this two-way communication mode there is currently no way, without the configuration card, to go back to a less intelligent one-way mode like Wiegand.

 

Note: Readers manufactured in 2017 or before may have a firmware version that uses a configuration mode that will not respond to a configuration card. If you contact Schneider Electric for a configuration card, supply the serial number (SN) from the back of the reader on your request.

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