FP Wireless LLC LRT01 Manuel D’Utilisation
2
The antenna can have a gain of no more than 8.1db. For best operation the coaxial cable between
the antenna and transmitter should be kept as short as practical. We recommend no more that 10 ft. More
coax than this will reduce the operating range of the system.
coax than this will reduce the operating range of the system.
The following antenna radiation pattern shows that there is a small amount of power being
radiated off the rear side of the yagi antenna and minor lobes on each side that should not cause any
problems. Parking a vehicle directly behind the antenna within 10 feet may allow the transponder to
operate, shortening battery life.
problems. Parking a vehicle directly behind the antenna within 10 feet may allow the transponder to
operate, shortening battery life.
RECEIVER INSTALLATION –
The Receiver can be located away from the Antenna at any convenient location. This may be on
a nearby fence, guard house, etc. It should be located within 100 ft. of the maximum read point of the
windshield transponder. If located within a metal building, or other difficult RF read area, an external
antenna can be connected to the receiver and mounted outside in a more favorable location. For a single
lane installation, no electrical connection is required between antenna and receiver.
ELECTRICAL HOOKUP –
windshield transponder. If located within a metal building, or other difficult RF read area, an external
antenna can be connected to the receiver and mounted outside in a more favorable location. For a single
lane installation, no electrical connection is required between antenna and receiver.
ELECTRICAL HOOKUP –
The Exciter requires a 1A, 12VDC power supply and the receiver requires a 0.5A 12VDC power
supply. The receiver can normally be powered by the same supply as the controller, like any other
proximity reader. The transponder is powered by an internal replaceable battery with an expected life of
5-7 years. We recommend use of the Keri Power Supply KPS-5. This is a 2 amp supply, but has the
provisions for battery backup. If battery backup is not desired, the KPS-7 is suitable.
Cable Requirements –
proximity reader. The transponder is powered by an internal replaceable battery with an expected life of
5-7 years. We recommend use of the Keri Power Supply KPS-5. This is a 2 amp supply, but has the
provisions for battery backup. If battery backup is not desired, the KPS-7 is suitable.
Cable Requirements –
Power supply cable for Exciter
18 Ga wire allows up to 500’
22 Ga wire allows up to 200’
24 Ga wire allows up to 100’
Power supply cable for Receiver
22 Ga wire allows up to 500’
24 Ga wire allows up to 200’
Data cable from Receiver to Keri Host Controller
This will be the cabling recommended by Keri for remote readers and will vary
depending on communication type. Check controller manual for proper
recommendations.
depending on communication type. Check controller manual for proper
recommendations.