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
indicator driving circuitry.
6 Refer to the appropriate system manual for specific wiring details.
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 Request to exit (REX) terminals on the reader are not to be connected for UL listed
installations.
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