User's Manual
7
4 Hardware interfaces
4.1 AntennaConnections
OR8400 supports four mono-static bidirectional RF antennas through four
reverse polarity TNC connectors. The maximum RF power can be delivered to
a 50 ohm load from each port is +30.0 dBm.
4.1.1 AntennaRequirements
The sensitivity of most of RFID reader is affected by antenna return loss.
OR8400 supports auto sensitivity improving technology. The technology can
reduce the effect to keep good sensitivity. The minimum antenna return loss is
10dB.
4.1.2 AntennaDetection
To minimize the chance of damage due to antenna disconnection, the
OR8400 supports antenna detection. Detection can be done automatically and
manually. Antenna detection helps protect the module from possible damage
due to return losses less than 6 dB.
4.2 Digital/PowerConnectorDefinition
The digital connector provides power, serial communications signals, LED
signal and reset signals to the OR8400 module. These signals are provided
through a connector that is compatible with part number: Molex 53261-1571 -
1.25mm pin centers, 1 amp per pin rating which mates with Molex housing p/n
51021-1500 with crimps p/n 63811-0300.
DigitalConnectorSignalDefinition
PinNumber PinDefine SignalDirection Notes
1 GND PowerGround
Mustconnectbothpinstoground
2 GND PowerGround
3 +12VDC PowerInput MustconnectbothpinstoDC+12V