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No Communication
When the Central and/or Remote unit is not communicating with its partner unit, the status LED will flash green/red. To
troubleshoot communication issues, check the following:
•
Power:
• Both units must be powered.
• Ensure proper power requirements are met: Unregulated Input 8 to 16Vdc @ 300mA max.
•
Installation:
• There should be a direct line of sight between Central and Remote units (if there is no direct line of sight, a
Repeater unit is recommended).
• The Central and Remote units should be installed level relative to each other.
• Both the Central and Remote units should be mounted high enough to avoid interference from obstacles
(vehicles, trains, buildings, trees, etc.).
• Metal mounting surfaces can affect communication as well as range. If use of a metal surface is
unavoidable, space unit
as far from metal surface as possible using a non-metal spacer.
• Antennas should both point up toward the sky (refer to Antenna Orientation, pg. 6).
• In some cases an optimal mounting location can be selected by operating one of the units on a small 12V
battery and moving the location while observing the diagnostic LED indicators.
•
Configuration:
• Ensure both Suprex units are set to the correct link type (see Configuration Mode, pgs. 7-9).
• Ensure Suprex units are properly paired (see pgs. 25-26).
• Ensure the Channel and Network ID settings on the Central and Remote units match (see Radio Configuration,
pgs. 25-26).
No Data / Invalid Data
If the access control panel is not receiving valid data, check the following:
•
Basic
Equipment Check:
• Ensure the reader and the access control panel data port are functional by directly connecting the reader to the
data port and passing card data.
• Check Suprex circuit boards for any signs of visual damage, such as burnt traces, burnt components, or
browning of the PCB; these usually indicate misapplied power.
•
Wiring:
• Ensure there is a common ground between the Remote unit and the card reader.
• Ensure there is a common ground between the Central unit and the access control panel.
• Ensure Wiegand data wires are correctly connected and not reversed.
•
Configuration:
• Ensure both Suprex units are set to the correct interface type (see Configuration Mode, pgs. 7-9).
• Ensure the access control panel is properly configured for the selected data format.
•
Data Voltage:
For a Wiegand connection, ensure Data 0 and Data 1 pins on Central and Remote units are at 5V
relative to ground. The data pins can be as low as 4.4V before failing. If any Wiegand data pin is less than 4.4V, it is
necessary to identify which device is pulling down the voltage.
• Disconnect the Suprex from the reader/panel.
• Maintain power on the Suprex and the reader/panel.
• Independently measure the voltages of the Wiegand data pins of the Suprex, and of the reader/panel. If one or
both devices have 4.3V or less, try enabling the pullup resistors on the Suprex by turning on DIP switch 5.
• If internal pullup resistors do not work, try external pullup resistors (through-hole resistor 500 ohms - 2K ohms).
To install external pullup resistors, place one end of the through-hole resistor into the +5Vdc pin on the Suprex
unit; place the other end in the low-voltage Wiegand data pin (see pg. 5).
Cypress Suprex® RF Series - Troubleshooting
