Installation Manual

Electrical Installation

Twin Disc, Incorporated

138

EC300 Control Power Wiring

Note: Using switched power to the EC300 Control is not

recommended. However, if standards or agencies require that all electronic circuits have on-off control, then use the same switched power that also feeds the engine controller.

CAUTION

Controller power or grounding connections can not be made at any conductor through which motor starting current flows. Do not use a connection directly on the engine or starter. Locate the connection as close to the battery as practical.

CAUTION

Use the same source of power for the EC300 Control as used for the electronically controlled engine, if applicable. Ensure that the circuit current rating is adequate for combined load of the EC300 Control and the engine controller.

CAUTION

Obtain power either from primary distribution for the engine or directly from the batteries. Primary distribution is the first location to which the heavy-duty battery wires connect. Do not connect downstream of any secondary circuit breaker or fuse.

Power Wiring Requirements

The following criteria must be met when installing power distribution wiring for

US installations:

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Low voltage conductors must comply with SAE standards J1127 Battery

Cable or J1128 Low Tension Primary Cable. The insulation temperature rating must meet the requirements of SAE J378 Marine Engine Wiring or UL 1426 Cables for Boats.

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Electric cables must be constructed of stranded copper conductors, thermoplastic, elastomeric or other insulation, moisture-resistant jackets, and, where applicable, armor and outer-sheathing are to be in accordance with IEC Publication 60092-353, IEEE 1580-2001 or other marine standards acceptable to the American Bureau of Shipping (ABS).

All electrical cables for power circuits are to have insulation suitable for a conductor temperature of not less than 60°C (140°F).

EC300 Marine Control System Installation Manual #1024168

Twin Disc, Incorporated

Electrical Installation

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Battery positive and negative power wires must be 14 American Wire

Gauge (AWG) minimum (15 amps max.).

Approved fuses or manual-reset trip-free circuit breakers must be used for the EC300 Control System power distribution wiring as per the applicable codes or standards. The fuse or circuit breaker rating must be 15 amps.

Note: A fuse or circuit breaker is required at the battery or power

distribution point for cable protection. The EC300 Control is internally protected.

A 15A fuse and fuse holder are supplied in the Power Connector Kit

(J13).

All fuses must meet the general provisions of Article 240 of the National

Electrical Code or IEC 92-202, as appropriate, and have an interrupting rating sufficient to interrupt the maximum asymmetrical RMS short-circuit current at the point of application. Each fuse must provide for ready access to test the condition of the fuse.

Unless otherwise permitted, the fuse or circuit breaker must be located within 178 mm (7 in.) of the point at which the power conductor is connected.

Note: If the wire is continually sheathed or enclosed and if

connected directly to a battery terminal, the distance may be up to 1,829 mm (72 in.).

Power distribution wiring must be insulated. Caps or boots are required at all terminals in order to prevent accidental shorts.

Special requirements apply to vessels with gasoline, liquid petroleum gas (LPG), or Marine Compressed Natural Gas (CNG) engines or to vessels with hazardous areas. Power routing and wiring must meet all applicable codes and standards. Circuit components may have to be rated as Ignition Protected as per SAE J1171 External Ignition Protection of Marine Electrical Devices, UL 1500 Ignition Protection Test to Marine

Products, and the electrical system requirements for boats in Title 33

CFR 183.410(a).

The main power wires to the power/interface connector (battery + and battery -) must be routed directly to the battery or a primary distribution panel within 1 m (3.3 ft) of the battery, but not the starter feed.

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Do not connect the EC300 Control’s battery + or - power input directly to the engine or any of its electrical components.

Connect the EC300 control power wires to the battery for the engine controlled by the EC300 Control. Port engine controls should be connected to the “port” battery. Starboard engine controls should be connected to the “starboard” battery.

Use a good quality connector to connect the power wires to the battery or bus bar and check the wires to be sure they are secure. Do not use simple spring-loaded connectors.

DC Distribution must be a two-wire system. Battery return wiring must be routed to the battery and not to the bonding system or the metallic hull. The negative side of the battery must be connected to ground if the system is to be grounded.

The electrical load added by the EC300 Control System is not large.

Current is limited to 15 amps at either 12 or 24 VDC. However, in some circumstances, this may require an increase in the capacity of the power distribution system, larger batteries, and/or larger grounding conductors.

The customer is responsible for meeting the applicable code and standard requirements.

140 EC300 Marine Control System Installation Manual #1024168

Twin Disc, Incorporated

Electrical Installation

Install the control power wiring as follows (See Figure 51 and Figure 52):

The EC300 Control operates on voltages between 10 and 28 VDC. DC to DC converters must be used for other system voltages. Power wiring must be a twisted pair of 14 AWG stranded copper wire.

Note: Figure 51 and Figure 52 show auxiliary batteries as is

required by certain codes and standards. If redundant (port and starboard) batteries are present, then use the port battery for the port controller’s main battery connection on J13 pin 1. Use the starboard battery for the auxiliary connections on J13 pin 2. Reverse the connector assignments for the starboard EC300 Control.

Note: Figure 51 and Figure 52 both show two single batteries.

This is typical for 12 VDC systems using 12 VDC batteries. The 24 VDC system typically connects two 12

VDC batteries in series to obtain 24 VDC. 6 VDC batteries can also be connected in series to achieve either 12 VDC or 24 VDC. Batteries can also be connected in parallel in order to increase the available battery current. Using a multimeter, test the voltage of each battery and across all batteries if multiple batteries are used so as not to exceed the voltage limits for the EC300 Control.

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Electrical Installation

Twin Disc, Incorporated

PORT CONTROL

TWIN DISC

INCORPORATED

MODEL EC300

P/N 1020676

BOM

S/N

VOLTAGE 12-24VDC

J1 J2 J3 J4 J5 J6 J7

15 AMP

J8 J9 J12

3

1

J13

4

6

J10 J11

CONNECTOR KIT

INSERT SEALING PLUG IN

CONTACT POSITIONS 4-6

J13-3

J13-1

HARNESS, WIRING

POWER

CUSTOMER SUPPLIED

POWER COMMON (14 AWG)

PRIMARY POWER INPUT (14 AWG)

-

PORT

BATTERY

+

NEGATIVE CONTROL LEADS

MUST BE CONNECTED TO

SAME SINGLE POINT

FROM STARBOARD

EC300 CONTROL

(IF USED)

-

STBD

BATTERY

+

HOOKING UP PORT CONTROL

TO STARBOARD BATTERY

IS OPTIONAL

TO STARBOARD

EC300 CONTROL

(IF USED)

15 AMP

FUSE AND HOLDER ARE SUPPLIED

WITH CONNECTOR KIT

INSTALL AS CLOSE TO BATTERY AS POSSIBLE

J13-2

AUXILIARY POWER INPUT (14 AWG)

Figure 51. Power Wiring Diagram for Unswitched Engine Powering

Applications

142 EC300 Marine Control System Installation Manual #1024168

Twin Disc, Incorporated

Electrical Installation

PORT CONTROL

TWIN DISC

INCORPORATED

MODEL EC300

P/N 1020676

BOM

S/N

VOLTAGE 12-24VDC

J1 J2 J3 J4 J5 J6 J7

NEGATIVE CONTROL LEADS

MUST BE CONNECTED TO

SAME SINGLE POINT

-

PORT

BATTERY

+

J10 J11 J12

3

1

J13

4

6

J8 J9

CONNECTOR KIT

INSERT SEALING PLUG IN

CONTACT POSITIONS 4-6

SWITCH

15 AMP

J13-3

J13-1

HARNESS, WIRING

POWER

CUSTOMER SUPPLIED

POWER COMMON (14 AWG)

PRIMARY POWER INPUT (14 AWG)

FUSE AND HOLDER ARE SUPPLIED

WITH CONNECTOR KIT

INSTALL AS CLOSE TO BATTERY AS POSSIBLE

SWITCH 15 AMP

J13-2

AUXILIARY POWER INPUT (14 AWG)

FROM STARBOARD

EC300 CONTROL

(IF USED)

-

STBD

BATTERY

+

HOOKING UP PORT CONTROL

TO STARBOARD BATTERY

IS OPTIONAL

TO STARBOARD

EC300 CONTROL

(IF USED)

Figure 52. Power Wiring Diagram for Switched Engine Powering

Applications

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Figure 53. Redundant Power Distribution

Note: Some applicable codes and standards (notably RMRS)

require completely redundant wiring between the EC300 controller and the auxiliary power supply. Figure 53 shows the connections for redundant power distribution.

EC300 Marine Control System Installation Manual #1024168

Twin Disc, Incorporated

Electrical Installation

2.

3.

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

1.

Install two fuses or circuit breakers at the battery positive or engine controller power distribution connections.

Route power wiring to the fuses or circuit breakers.

Temporarily remove the fuses or open the circuit breakers.

Note: Power wiring must be a twisted pair of 14 AWG stranded

copper wire.

CAUTION

Ensure that the EC300 Control power wiring is electrically identical to that used for any associated engine controller.

4.

5.

Connect the first red wire going to EC300 Control Connector J13 Pin 1 to the load side of Main Battery fuse or circuit breaker.

Note: If no auxiliary battery is present, do not install a wire to

J13 Pin 2. Pin 2 should be plugged.

Connect the second red wire going to EC300 Control Connector J13

Pin 2 to the load side of the Auxiliary Battery fuse or circuit breaker.

CAUTION

The two batteries and the EC300 Controller’s negative power connection must be made at the same point.

6.

7.

8.

Connect the yellow (preferred) or black wire going to EC300 Control

Connector J13 Pin 3 to the DC Grounding Bus or the DC Negative Bus as is applicable.

Route the EC300 Control Power and Grounding Harness (J13) to the associated EC300 Control.

Note: The Deutsch contacts (14 AWG) (P/N 0462-209-16141)

have a green band.

Using the Deutsch crimping tool (P/N HDT 48-00), crimp the wires to the Deutsch contacts (14 AWG) (P/N 0462-209-16141).

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Twin Disc, Incorporated

9.

Assemble the J13 Deutsch Mating Connector (P/N DT06-6S-P012).

See Figure 51 and Figure 52.

10.

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

11.

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

Note: For vessels complying with American Bureau of Shipping

(ABS) Rules for Building and Classing Steel Vessels 2002 or Rules for Building and Classing Steel Vessels Under

90 Meters (295 Feet) 2001, insulation resistance of power and lighting cables is to be measured. Appliances connected to the circuits may be disconnected for this test. Each power and each lighting circuit is to have an insulation resistance between conductors and between each conductor and earth of not less than 0.4 Megohms for loads less than 25 amps.

12.

Ensure that the power harness conductors for J13 pin 1 through J13 pin

6 are disconnected at both ends.

13.

Using a 500 VDC Megohmmeter or equivalent, measure the resistance between each of the following sets of conductors: z z

J13 pin 1 and Earth or Bonding System

J13 pin 2 and Earth or Bonding System z

J13 pin 3 and Earth or Bonding System

14.

Verify that all measurements are greater than or equal to 0.4 Megohms.

Note: Leave EC300 Control Power and Grounding Harness

(J13) disconnected from the EC300 Control until all wiring has been completed.

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