3.2 Electrical Equipment Power Connections

3.2.1 High Current 12 V Power Input

High Current 12 VDC Power Source Requirements

High Current 12 VDC Power Connection Instructions

1. High Current 2 AWG conductors connect the Seakeeper to the DC source are supplied as length 13ft (4 m). Approximately 3 ft (1 m) is routed inside the Seakeeper frame.
2. Conductor length may be increased, but changing from 2 AWG to larger wire size does not allow longer length than 30 ft (9 m) each. The length limit is required to limit the inductance from the high current conductors.
3. Use the shortest length and most direct route to the battery bank as possible.
4. Bind positive (B+, red) & negative (B-, black) conductors together throughout entire length and do not coil.
5. Connect positive conductor (B+, red) through dedicated over-current protection device (customer supplied) and a dedicated isolation switch (customer supplied) then directly to battery positive terminal.
6. Connect negative conductor (B-, black) directly to battery negative terminal.

7. If the 2 AWG high current 12 V power input conductors are shortened or lengthened, use heavy-duty eyelet (closed end) terminal such as Molex 19221-0235 and follow instructions on Seakeeper Drawing No. 90470 – Seakeeper 2 Cable Block Diagram, sheet 2.
8. The bare wire strands should extend fully into the barrel of the heavy-duty eyelet and be crimped in two places if possible then sealed with double-wall heat shrink tubing. Crimp heavy-duty terminals with Quick Cable 4245 Crimp Tool, Molex 19284-0034 Crimp Tool, or equivalent using manufacturer’s instructions.

3.2.2 Low Current 12 V Power Input

Low Current 12 VDC Power Source Requirements

Low Current 12 VDC Power Connection Instructions

Reversing polarity on the DC power input to the Seakeeper can result in damaging the electronics in the control system.

1. Install Seakeeper-provided Low Current DC Power Input Cable, (P/N 20248) to battery bank.
2. Connect control power positive conductor (B+, red) through dedicated over-current protection device (customer supplied) and a dedicated Seakeeper isolation switch (customer supplied). A 2AWG, B+ conductor (red), is capable of carrying the current for both the High Current, Low Current, and Seawater Pump from the 12VDC power supply to the dedicated battery isolation switch.
3. Connect negative conductor (B-, black) directly to battery minus terminal or negative DC bus bar.
4. Before connecting Low Current Power Cable to Seakeeper, check for proper voltage and polarity with a DC multimeter using Figure 14 below.

When energizing DC power the first time, if display does not power up immediately then disconnect and inspect connector polarity.

5. Connect low-current control power cable to Low Current 12 VDC power input connector on the Seakeeper, Deutsch DTP04-2P connector.

3.2.3 DC Seawater Pump 12 V Power Output

DC Seawater Pump 12 VDC Power Source Specifications

DC Seawater Pump 12 VDC Power Input Connection Instructions

1. Located the Seawater Pump Power Input Cable (P/N 30327) for Seakeeper 2 “SW Pump DC In” connection on Seakeeper 2 wire harness (as shown in Drawing No. 90470).
2. Connect the 16 AWG positive conductor (red) through dedicated overcurrent protection device (customer-supplied), maximum of 15A, to dedicated battery isolation switch.
   
   • The High Current, 2AWG B+ conductor (red), is capable of carrying the current for both the High Current, Low Current, and Seawater Pump from the 12VDC power supply to the dedicated battery isolation switch.
3. Connect the 16 AWG negative conductor (black) directly to battery negative terminal or DC main negative bus bar.
4. Before connecting the SW Pump Power Input Cable to the Seakeeper 2, check for proper voltage and polarity with a DC multimeter using Figure 15 below.
5. Connect SW Pump Power Input Cable to Seawater Pump 12 VDC In connector on the Seakeeper, DEUTSCH DT04-2P connector.

Seawater Pump 12 VDC Power Output Connection Instructions

1. Locate the Seawater Pump Power Output Cable (P/N 20334) for “SW Pump 12VDC Out” connection on Seakeeper 2 wire harness (as shown in Drawing No. 90470).
2. Pumps rated at 12 VDC, 15 amps maximum, customer-supplied, must be configured with a Deutsch DT series, 2-pin receptacle to mate with the connector as shown in Figure 16.
   • TE Connectivity (Deutsch) DT04-2P Receptacle, 2-Way, for Male Pins (qty 1)
   • TE Connectivity (Deutsch) 0460-202-1631 Pin, Solid, Gold-plated, Size 16, 16-20 AWG (qty 2)
   • TE Connectivity (Deutsch) W2P Wedgelock for 2-Way DT Receptacle (qty 1)

4. The Seawater Pump Power Output Cable must be routed and installed in the vessel from the Seakeeper 2 “SW Pump 12VDC Out” Deutsch connector plug (pins end) to the DC seawater pump cable Deutsch connector (socket end).
5. Connect Seawater Pump Power Output Cable (socket end) to the customer-supplied receptacle end (pins end). The recommended wiring arrangement is shown in Figure 17
6. Seakeeper DC Seawater Pump Assembly (P/N 30331), which is prewired for the Seawater Pump Output Cable, is available as an option with the Seakeeper 2.