Installation manual

Connecting peripheral equipment
77
851--164300 / C
8.3 Course gyro connection
Overview
The SH80 sonar can read the course information from an RS-232
serial line. In case where only a 3-phase synchro or stepper signal
is available, an optional Gyro Interface Unit must be used for
converting these signals to RS-232 serial line format.
→ More information about the Gyro Interface Unit can be found on
page 7.
Gyro with RS-232 serial line output
The course data on the RS-232 serial line must be on a standard
NMEA 0183 telegram format. The telegram can contain both the
speed and the course data.
→ Refer to the telegram format description on page 139.
Refer to the cable connection drawing for termination of the serial
line data i n the Sonar Interface Unit.
→ Refer to the drawing on page 159.
For connection to the course gyro, refer to the applicable gyro
documentation.
Gyro with 3-phase synchro or stepper output
If only a 3-phase synchro or stepper signal is available, an optional
gyro interface unit must be used to convert these signals to RS-232
serial line format. An LR40 Digital Gyro Repeater may be used for
interfacing the following signals:
• 3-phase synchro signal, 20-115V L-L, 50/60/400 Hz, gear ratio
1:360 or 1:180
• 3-phase stepper signal, 20-115V L -L, gear ratio 1:360 or 1:180
The LR40 Digital Gyro Repeater can be delivered from Simrad on
part number 298-078535.
→ For connection to the LR40 Digital Gyro Repeater, refer to the
LR40 Instruction Manual.
Refer to the cable connection drawing for termination of the serial
line data i n the Sonar Interface Unit.
→ Refer to the drawing on page 159.