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Operation
Card reader LED outputs
Dual-line LED control
It is important to put the card reader in the dual-line LED control
mode. This is can be done by ordering the correct model reader,
setting the correct option switch, or using a mode control card.
Refer to the manufacturer’s installation sheet for details. If the
card reader is left in the single-line LED control mode, the green
and red LED functions may appear reversed.
Red LED
The CRC drives two LED outputs, one designated for the red
LED wire to the reader and the other for the green LED wire to
the reader.
Normally, the red LED on the reader is on as an indication that
the reader is receiving power and ready to read cards. In most
readers, when a card is presented to the card reader the red LED
flashes indicating that the card presented has been read. This is a
function of the reader itself and not a function of the CRC.
If a 3-CPU unlock command is sent to the CRC from a rule or
command the red LED output turns off.
If a card was read in and the unlock timer has the door unlocked,
the red LED output turns off.
If a REX device, unlock button, or 3-CPU command for a timed
unlock is received and the manual unlock timer has the door
unlocked, the red LED output turns off.
If a card was read and a PIN is required, the red LED output
flashes slowly off and on at a rate of one cycle per second. This
mode lasts for 30 seconds.
The two-person rule and escort and visitor applications require
that two cards be read to badge in. After the initial card has
badged in, the red LED output flashes quickly off and on at a
rate of two cycles per second, for 30 seconds.
Green LED
Normally, the green LED on the reader is off. In some readers,
when a card is presented, the green LED flashes on as indication
that the card has been read. This is a function of the reader itself
and not a function of the CRC.
If a 3-CPU unlock command is sent to the CRC from a rule or
command, the green LED output turns on.
7.8
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CRC Technical Reference Manual