4322 Cotag Reader module
4-7
The LED outputs have the following meanings.
Green
Access granted - the door is unlocked.
Red
Access denied - the reader is operational and ready to read a card. A
red LED output normally means that the door is locked. However,
when anti-passback is in use a Reading Head may be positioned on
either side of the same door. In this situation, someone can be read
on one side and unlock the door while the LED on the other side
continues to show red.
Amber
The amber LED gives information about cards which are read by the
system. Its function depends on whether the red LED is lit or the
green LED is lit when the card(s) come within range of the antenna.
When the red LED is lit:
• A valid card unlocks the door, the red LED goes out and the
green LED lights for the duration of the relay time. The amber
LED does not light.
• An invalid card lights the amber LED for as long as the card
remains in range of the antenna. The red LED remains lit.
• If more than one card is detected at the same time the amber
LED flashes for as long as the cards remain in range of the
antenna. If one card becomes significantly nearer the antenna
than the other, the closer card will be read as if the other were
not present.
When the green LED is lit:
• A valid card lights the amber LED for half a second to show
that the card has been correctly read.
• If either an invalid card or more than one card is within range
of the antenna, the amber LED does not light.
An invalid card is one which has the correct Distributor Code, but is
denied access because of one of the violations specified on the Access
Violations page of the System Administration part of the Access
Control Software. A card with an incorrect Distributor Code is treated
by the system as if it weren’t there at all, but its presence will affect
the reading of other cards.
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