DC-1023
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8/5/2010
Your best option for Proximity Access Control
3.4 GENERAL WIRING REQUIREMENTS
All the Reader wiring must be continuously shielded. AWID recommends using #22
AWG up to #18 AWG, six or seven-conductor shielded cables. Longer distances and
higher current consumption on the power supply line will require larger gauge wires.
Refer to Table 1 and Figure 1, Figure 2 and Figure 3 on the following pages to
determine your data lines’ wiring requirement. Due to system data termination
differences, contact your panel manufacturer for their specific requirements.
WIRE SIZE
#22 AWG (0.6mm Dia)
#18 AWG (1.2mm Dia)
WEIGAND
500ft (152 meters)
980 ft (300 meters)
RS-232
50 ft (15 meters)
50 ft (15 meters)
Table 1
Data Line’s Wiring Requirement
NOTE: WHEN USING AN EXTERNAL POWER SUPPLY, ALWAYS USE A LINEAR
POWER SUPPLY, DO NOT USE A SWITCHING POWER SUPPLY.
3.5 POWER
SUPPLY
AVOID
using a single power supply for Reader and the magnetic lock. Doing so will
affect the Reader operation and can damage the Reader.
3.6 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. This 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 or for best results drive your own copper clad ground rod
into the earth for the ground point.
For multiple Reader installations, it is critical that all Readers are connected to a single
ground point. Using multiple ground points will create secondary current paths or
ground loops that can affect the performance and cause damage to the Reader.
3.7 WIRING
DIAGRAMS
The Reader is designed for Wiegand and RS-232 standard communication formats; use
Figure 1 for Wiegand format installation and Figure 2 for RS-232 format installation, and
use Figure 3 for combined Wiegand and RS-232 installation. If an external power
supply is being used, leave the Panel’s Ground and Power terminals open and connect
the Reader’s Ground (Black) and 5-12VDC (Red) terminals to the external power
supply.
