14 | ST40 Speed Instrument Owner’s Handbook |
Running transducer cable
Each transducer has a 9 m (30 ft) cable fitted with spade terminals for connection to the ST40 Speed instrument. Observing the following guidelines, run the cable to the instrument:
•If the cable has to be fed through the deck, always use a good quality deck gland.
•Where cables are fed through holes, always use grommets to prevent chafing.
•Secure long cable runs so they do not present a hazard.
•Wherever possible, route the cable away from fluorescent lights, engines, radio transmitting equipment, as these may cause interference.
Connections to the instrument
You can connect your instrument:
•Directly to the speed transducer as a
•As part of a SeaTalk system either as a repeater or, with a transducer also connected as a system master. To connect to SeaTalk, you will need an additional SeaTalk Interconnection Kit, (Part No. E25028). When connected in this manner, power can be provided from the SeaTalk bus (e.g. from the autopilot).
You can also connect the instrument to both the speed transducer and SeaTalk. When thus connected, the instrument will be the master speed instrument for the SeaTalk system.
If it is necessary to fit spade connectors to the transducer cable, do so as shown in the following illustration. Prepare the cable, as at (a), and fit the spade connectors, as at (b). When fitting each spade connector, ensure that wire strands do not extend beyond the rear of the spade connector insulation.