Note: (Unless otherwise specified):
1 For Micro/2/4/5 only: a 470 ohm, 1/2W, pull-up resistor is required between +12 VDC and
READER DATA 1. The pull-up resistor should be installed at the microcontroller’s terminal block.
Resistors are supplied with the reader.
2 Shielded cable is recommended in electrically noisy environments.
3 If using shielded cable, connect all shields together at the microcontroller end. Connect to the
ground stud in the lower left corner of Micro/2/4/5 cabinets using 14-AWG wire. No shield
connections at the reader.
4 If using a local power supply, do not connect +12V line from the microcontroller to the reader.
However, the negative side of the power supply must be connected to the microcontroller
(pin 2 on the reader port). Keep the wiring from power supply to reader less than 50 feet.
5 Switching the external indicator drives to GND activates the indicator. High impedance or +12V
deactivates indicators. These drives may also be connected to user supplied, external
indicating circuitry.
6 Refer to the appropriate system manual to determine whether this connection is required for
door switch operation.
7 Blocking diodes may be 1N5817 or GE part number 521224001 (included with reader). The
diode must be installed in a secure location, not accessible through the reader removal.
8 Protection diodes may be 1N4002, 1N4003, or 1N4004 (installer supplied) for the door strike
assembly.
9 Fuse, power supply, door strike, and relay are provided by the installer.
10 If the door contact switch is not used, link reader pin 10 to pin 2.
11 Request to exit (REX) terminals on the reader are not to be connected for UL listed installations.
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