101-001 (iTDC), 101-002 (EIO88), 101-145 (iTDCSR) -74- Users Manual
IDTeck – iTDC 2~4 DOOR ACCESS CONTROLLER
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The reader seems to read cards, but the controller does not respond or does not respond properly,
such as displaying wrong card numbers in the reader test mode.
Cause Reader defect, wiring error between the reader and the controller, or the electric noises around.
Solution 1. Be sure that the reader reads the card ID when you present a card.
2. Be sure that the reader format is correct. 26bit Wiegand or 34bit Wiegand for iTDC-SR
3. Check the wiring between the reader and iTDC.
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Check the wires of Wiegand data lines D0 and D1, which is connected correctly.
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Connect the controller ground to the ground wire of the reader and it is recommended to
connect them to an earth ground.
4. Using oscilloscope, check the shape of signals from the reader at the controller’s side.
When noises are shown on the signals, it is recommended to use shielded wires and the
unused wires to the common ground. You can use repeaters, also.
5. Check the maximum cable length, which may be indicated on the reader manual.
6. If the trouble remains after the procedure above, contact a designated service centre.