4.2.4 - WIRING
Wiring an LR-3000 reader is not the same as wiring other reader types For the Wiegand interface, Data-0 and Data-1 lines are the same, but all
other wires are different. Refer to the wiring diagram for additional support.
The reader must be armed to transmit its RF field. To arm the reader, its yellow wire must be connected to its black wire.
• To transmit RF only when a vehicle is present at the reader, use a buried loop or other vehicle sensor with relay contacts that connect
the yellow and black wires temporarily.
There must not be any connection between the reader's power supply and the host system's panel — not even a ground connection. The power
supply must be floating.
The reader's drain wire and the cable's shield wire must be connected together, but they must not be grounded. These shields must be floating.
(Induced noise is drained inside the LR-3000 reader.)
To bypass a problem in the cable, wire the LR-3000 reader directly to the panel's reader input port.
• Connect the reader's 3 data wires directly to the panel's reader input port — green to Data-0, white to Data-I, and
blue to Data Common on the same reader port. If there is no terminal labelled "Data Common" on that reader port, connect the blue
wire to the electrical Ground or Common terminal on that reader port.
• Use an independent DC power supply that meets AWID's specifications fully (Section 1.2.4). Do not connect the
reader's black and red wires to the controller panel.
• If the reader now operates normally, there may be a problem in the cable or its junctions, or in the conduit.
For best results, use a separate port for every reader. This preserves the data pulse shape, and allows each reader to have its own address in the
host system.
Check the unused wires on the reader.
• The unused wires must not touch each other or anything else. Tape them off singly.
• The violet and brown wires are not used for standard installations. They should be separately taped or capped.
• The orange wire is used by the LR-TEK Kit's LR-Sounder. Keep this wire continually accessible for testing.
For RS-232 serial interface, see Technical Reference "RS-232 Interface". Download it from www.awid.com/support
4.2.5 - GROUNDING
The LR-3000 reader has no grounded wires. Three wires are used as common or negative wires — black wire for power supply negative, blue
wire for data-common, and drain (bare silver) wire for shield draining.
• These 3 wires must be wired correctly as shown in Figure 2. These 3 wires must not be connected to each other.
• The reader's yellow wire must be connected to the black wire to arm the reader for RF transmission.
The reader's power supply DC negative and the panel's electrical ground must be kept separate.
• Do not wire these two negatives together. Let the power supply's secondary (DC) side float.
• The panel and readers must be powered by different DC power supplies (or isolated outputs in a multi-channel
supply).
Check the reader's drain wire (silver stranded wire without insulation).
• The drain must be tied to the shield of the cables between the reader and the panel, and between the reader and the
power supply — but the shields must not be grounded anywhere. The shields must float. (Draining occurs inside the reader.)
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