User's Manual

TABLE 4.4-1: Data Line’s Wiring Requirement

WIRE SIZE #22 AWG (0.6mm Dia.) #18 AWG (1.2mm Dia.)

WIEGAND 500 ft (152 meters) 980 ft (300 meters)

RS-232 45 ft (15 meters) 45 ft (15 meters)

4.5 Power Supply

For consistent performance, choose a Low Noise/High Efficiency switching power supply

4.7 Grounding

Grounding is critical for proper operation of the Reader. When installing the Reader, it is crucial

to assure that the earth ground is the best ground available. If you elect to use the AC main

power ground, conduct a test by measuring its resistance relative to a known good ground, such

as a cold water pipe or a structural steel that is in direct contact with the ground. The resistance

should be less than 50 ohms. If you find that the AC main power does not provide adequate

earth ground, try using a solid connection to a cold water pipe.

Outer shield of cable should not be grounded.

For multiple Reader installations, it is critical that all Readers are connected to the same

grounding system. Using different grounding systems will create secondary current paths or

ground loops that can affect the performance and cause damage to the Reader.

4.8 Wiring Diagrams

See Fig’s 5.2-1,2,3

5.0 INSTALLATION PROCEDURE

Verify that all item listed in Section 5.1 of this manual are present before starting the installation.

5.1 Parts List

A. Installation sheet, P/N: 006-99-A QTY=1

B. Sentinel-Prox LR-911 Reader, P/N: 004-20-A QTY=1

C. #6-32 x 1” Machine screw, P/N: 0616MPP QTY=4

D. #6-32 Hex Machine Screw Nuts, P/N: 06NH QTY=5 (1 spare)

E. #6 External Tooth Lockwashers, P/N: 06WE QTY=5 (1 spare)

F. Screw hole plug, P/N: 004-27-A QTY=5 (1 spare)

AWID PROPRIETARY

5.2 Installation Steps