Rmi/Obi - Garmin GNS 530W Installation Manual

4.9 RMI/OBI

4.9.1 RMI/OBI Function
The MAIN OBI output provides bearing information from the active waypoint for Bendix/King Serial
OBI devices based upon the 500W Series unit's GPS navigation. For the GNS 530W, the MAIN OBI
output may be configured so that it sends VOR/ILS bearing information when VLOC is selected by the
GNS 530W CDI key.
The VOR OBI output provides bearing information from the currently tuned VOR station for
Bendix/King Serial OBI devices based upon the GNS 530W VOR receiver. When a localizer channel is
tuned on the VLOC window, there is a bit in the data stream set to indicate that a localizer frequency is
tuned which stows the needle or drive it to the 3 o'clock position.
4.9.2 RMI/OBI Electrical Characteristics
Pin Name
MAIN OBI CLOCK
MAIN OBI SYNC
MAIN OBI DATA
Pin Name
VOR OBI CLOCK
VOR OBI SYNC
VOR OBI DATA
The output driver is active low. The driver output voltage is not more than 1.0 V when sinking 20 mA.
The maximum off state leakage current with respect to ground is less than 10 μA.
4.9.3 RMI/OBI Configuration
For the GNS 530W, see Section 5.3.9 for the MAIN OBI source configuration.
4.9.4 RMI/OBI Calibration and Checkout
Refer to Section 5.5.7.11 for calibration and checkout.
4.9.5 RMI/OBI Interconnect
Refer to Figure H-20 for the RMI/OBI interconnect.
500W Series Installation Manual
190-00357-02
Connector Pin
P5001 43
P5001 45
P5001 44
Connector Pin
P5006 25
P5006 26
P5006 27
I/O
Out
Out
Out
I/O
Out
Out
Out
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