Insert Assembly Installation; St40 Speed Transducer Connections - Raymarine ST40 Service Manual

Chapter 1, Speed Transducer

Insert assembly installation

ST40 Speed transducer connections

ST40 Instruments Service Manual 83149-2
When reinstalling the insert assembly:
• Ensure that the 'O' rings have been inspected and if necessary, replaced and
lubricated
• Ensure that the key of the insert assembly locates with the keyway of the housing
assembly.
• Secure with cap nut (hand tighten).
Cable core Instrument head circuit
colour diagram reference
Red 12V
Green SPD
Screen 0V
White TEMP
Brown 0VANA
Description
Approximately 11.2 V dc out
With transducer attached, spinning paddlewheel
produces pulses approximately 11.2 V dc in amplitude
at 5.5 Hz/knot.
0 V
With transducer attached, voltage here is dependent
on temperature. Approximately 1.8 V at 0 degrees C.
0 V
3 - 3