Installation Manual

Twin Disc, Incorporated

Electrical Installation

Multi-Station Dual Lever Control Head Wiring Installation Using Station Doublers

This section is applicable to multiple engine applications with more than three

(3) Dual Lever Control Heads per EC300 Control. Each EC300 Control can directly accept up to three Control Head inputs. Using Station Doublers, a total of five Control Head inputs can be supported. Each Station Doubler combines the signals from two separate Control Heads and routes the combined signals to each of the EC300 Controls at J2 or J3. See Figures 33 and 34.

Figure 33 shows five Control Heads and two Station Doublers. The control head not connected to a station doubler must be connected to J1.

PORT STBD

CONTROL STATION 1

PORT STBD

CONTROL STATION 2

PORT STBD

CONTROL STATION 3

PORT STBD

CONTROL STATION 4

PORT STBD

CONTROL STATION 5

STARBOARD

STATION

A

STBD

STATION

B

PORT

STARBOARD

1020617

PORT

STATION

A

PORT

STATION

B

HARNESS, WIRING

DUAL LEVER

7 PLACES

STARBOARD

PORT

STATION

A

STBD

STATION

B

CIRCULAR

CONNECTOR

7 PLACES

BOX, JUNCTION

STATION DOUBLER

2 PLACES

STARBOARD

1020617

PORT

STATION

A

PORT

STATION

B

PORT CONTROL STARBOARD CONTROL

TWIN DISC

INCORPORATED

MODEL EC300

P/N 1020676

BOM

S/N

VOLTAGE 12-24VDC

6

J1

7 6

J2

7 6

J3

7

J4 J5 J6 J7

1 12 1 12 1 12

J8 J9

2

1

J10

3

4

J11 J12 J13

TWIN DISC

INCORPORATED

MODEL EC300

P/N 1020676

BOM

S/N

VOLTAGE 12-24VDC

6

J1

7 6

J2

7 6

J3

7

J4 J5 J6 J7

1 12 1 12 1 12

J8 J9

2

1

J10

3

4

J11 J12 J13

1020614

RECEPTACLE

T CONNECTOR (J1939)

2 PLACES

CONNECTOR

TERMINATING RESISTOR

2 PLACES

HARNESS, WIRING

COMMUNICATION

1020615

1020614

HARNESS, WIRING

CONTROLLER COMMS

2 PLACES

Figure 33. Typical Five Station Dual Lever Control Head Wiring

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Electrical Installation

Twin Disc, Incorporated

Note: Station Doublers may also be used on single-engine

Single Lever Control Head applications if more than three

Control Heads are required. Single Lever Control Head

Station-to-Doubler harnesses are used in place of the dual lever station-to-doubler harnesses. A port station-todoubler harness is used with a Port Control Head. A starboard station-to-doubler harness is used with a

Starboard Control Head.

PORT STBD

CONTROL STATION 1

PORT STBD

CONTROL STATION 2

74

TO STBD

CONTROL

TO PORT

CONTROL

BOND WIRE

WITH RING LUG

BOX, JUNCTION

STATION DOUBLER

STATION

A

STBD

STATION

B

STARBOARD STARBOARD

1020617

PORT PORT

HARNESS, WIRING

DUAL LEVER

3 PLACES

STATION

A

PORT

STATION

B

Figure 34. Station Doubler Connection Using Dual Lever Control Heads

Install the Control Head harnesses as follows:

Note: The Doubler-to-Station Harness routes between the

Control Head and the Station Doubler. The Doubler-to-

Control Harness routes between the Station Doubler and the EC300 Control (J2 or J3).

Note: The Control Head may be removed from the dash if this facilitates making the connection. If it is removed, then reinstall it after the connections have been made.

EC300 Marine Control System Installation Manual #1024168

Twin Disc, Incorporated

Electrical Installation

Note: Provide enough length in the harness to allow removal of the Control Head in the future.

Refer to General Electrical Installation Guidelines for harness routing criteria.

Control Station 1

1.

Connect the circular connector end of a Doubler-to-Station harness to the Dual Lever Control Head.

Note: For each Control Head connector, align the large connector key with the large keyway and push the connector into place. Then, turn the connector’s collar until the engagement snap is felt.

Ensure that the Dual Lever Control Head is firmly mounted.

2.

3.

4.

5.

Route the Doubler-to-Station harness to the Station Doubler.

Connect the Doubler-to-Station harness plug marked “PORT” into the receptacle marked “STATION A” on the “PORT” end of the Station

Doubler.

Connect the Doubler-to-Station harness plug marked “STARBOARD” into the receptacle marked “STATION A” on the “STBD” end of the Station

Doubler.

Control Station 2

6.

Connect the circular connector end of a Doubler-to-Station harness to the Dual Lever Control Head.

7.

8.

Ensure that the Dual Lever Control Head is firmly mounted.

Route the Doubler-to-Station harness to the Station Doubler.

9.

Connect the Doubler-to-Station harness plug marked “PORT” into the receptacle marked “STATION B” on the “PORT” end of the Station

Doubler.

10.

Connect the Doubler-to-Station harness plug marked “STARBOARD” into the receptacle marked “STATION B” on the “STBD” end of the Station

Doubler.

EC300 Marine Control System Installation Manual #1024168

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Electrical Installation

Twin Disc, Incorporated

Doublers to EC300 Control

11.

Connect the circular connector end of a Doubler-to-Control harness to the receptacle on the Station Doubler marked “CONTROL”.

12.

Route the harness marked “PORT” to the EC300 Port Control.

Note: It is desirable, especially on single station vessels, to route the port and starboard harnesses as far apart as possible.

This minimizes the odds of both harnesses being accidently damaged at the same time allowing continued, but reduced, control of the vessel.

13.

Connect the Doubler-to-Control Harness plug to the J2 receptacle of the Port EC300 Control.

14.

Route the harness marked “STARBOARD” to the EC300 Starboard

Control.

15.

Connect the Doubler-to-Control Harness plug to the J2 receptacle of the Starboard EC300 Control.

16.

If applicable, repeat steps 1 through 15 to connect two additional Dual

Lever Control Heads through a second Station Doubler to the J3 receptacles of the EC300 Port and Starboard Controls.

17.

If J2 and/or J3 are not used, install a connector kit into these receptacles to seal the connector. See System Drawing for Connector Plug Kit p/n.

18.

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

76 EC300 Marine Control System Installation Manual #1024168

Twin Disc, Incorporated

Electrical Installation

Bonding Wire

19.

Route a bond wire from the vessel bonding system to the selected mounting pad on each Station Doubler. See Figure 33.

Note: The bonding conductor must be 14 AWG stranded copper wire. It must be colored green with a yellow stripe

(preferred) or green in order to comply with ABYC standards.

20.

Install a ring lug on the doubler end of the wire.

Note: The ring lug must be properly sized for both the wire and the mounting fastener.

21.

Remove the mounting fastener at the bonding connection.

22.

Remove any paint at the mounting connection in order to ensure electrical contact.

23.

Insert the bonding wire’s ring lug on the Station Doubler.

24.

Reinstall and tighten fasteners up to 1.13 Nm (10 lb-in.) maximum.

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