Installation Manual

Electrical Installation

Twin Disc, Incorporated

Tachometer Output Wiring Installation

The tachometer output circuit is used to drive a tachometer indicator. This signal can be used to drive a tachometer at the helm indicating either engine or propeller speed.

Install the tachometer output wiring portion of the Bridge Signals harnesses as follows (See Figure 44):

3.

4.

5.

Refer to General Electrical Installation Guidelines before proceeding with this section.

1.

Note: EC300 Bridge Signals Harness (J8) also may contain wiring for other features. Route the harness to the most convenient location serving all the applicable connections.

Connect one customer supplied wire to the signal input connection on the tachometer.

2.

Connect the other customer supplied wire to the return connection on the tachometer.

Route the two wires to the EC300 Control.

Remove the locking wedge from the Deutsch connector.

Insert the wire connected to the tachometer signal input into position 5 of the J8 connector.

6.

Note: Refer to the EC300 System Installation Drawings in the

Engineering Drawings Section for pin numbering

information.

Note: The J8 connector is part of the Bridge Signals Harness.

Insert the wire connected to the tachometer signal return into position 6 of the J8 connector.

116 EC300 Marine Control System Installation Manual #1024168

Twin Disc, Incorporated

Electrical Installation

7.

When all pins have been inserted in the connector body, reinsert the

Deutsch locking wedge into the front of the connector body.

Ensure that sealing plugs are installed in all empty connector positions.

8.

9.

Align the harness connector with the J8 receptacle of the EC300 Control and push it in until it snaps into place.

10.

Secure all harnesses to a supporting structure with clamps or cable ties at 406 mm (16 in.) intervals.

Note: It may be desirable to complete any other terminations for this harness before securing the harness.

EC300 Marine Control System Installation Manual #1024168

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