Specifications

BATS AND PORTABLE BATS INSTALLATION

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2.3.8.3 VRU INTERFACE (MODEL 4414B)

The VRU input of the ANALOG connector accepts PITCH and ROLL analog signals from an external

dynamic motion sensing system, such as the EdgeTech Model 4414B. (See Figure 2-24.) The pitch

and roll signals compensate target position for vessel motion. The analog inputs can accept voltag-

es up to +/-10 VDC. The normal vessel motion for a positive Voltage pitch is BOW UP and the nor-

mal vessel motion for a positive Voltage roll is PORT UP. The polarity of the analog input signals to

the Transceiver can be reversed and compensated for in the REMOTE VRU POLARITY menu. Normal

polarity for pitching bow up is (+) and for rolling port side up is (+). The VRU scaling can also be

modified under the REMOTE VRU SCALE menu. Normal scaling LINEAR is 0.2 V/degree (+/- 10VDC

= +/-50°). (optional scaling is 10 sin )

NOTE: For a Remote VRU the normal voltage polarity for pitching BOW UP is [+]. The nor-

mal voltage polarity for rolling PORT UP is [+]. The system configuration software

(Trackman) shows the roll and pitch polarity [+] when the vessel pitches BOW UP or

rolls PORT UP. The RS232 Format STD W/PR (standard format with pitch and roll at

end of data string) also outputs data with this same protocol. The RS232 Format

NMEA ORE (NMEA 0183 type format string that is proprietary to EdgeTech and in-

cludes pitch and roll data at end of string) is different in that it outputs data in the

same polarity as its incoming voltage. This allows pass-through of signals from re-

mote VRU to integrated navigation system without modification of polarities.

When using the Model 4730B VRU setup the Attitude Sensor for Internal. This auto-

matically sets up the parameters to agree with this standard EdgeTech sensor.

Connect the pitch signal to pin-L and the roll signal to pin-S. Connect the analog commons to pins-

P & R respectively.

Also see the newer EdgeTech MODEL 4760B MRU. It uses MEMS technology to provide very accu-

rate pitch and roll data. It connects to the Analog Connector for its power and to COM#3 for its

data.