Optional Installation | P12 |
7521 AND 7522 BATTERY CHARGERS |
Integrate the P12 Battery Charger with Blue Sea Systems Automatic Charging Relays to take advantage of Charge Coordination.
NOTE: If you have a Blue Sea Systems ACR with Start Isolation, it is possible to take advantage of your P12 charger’s ability to integrate in order to optimize charging of your batteries.
Automatic Charging Relays (ACRs) combine battery banks when a charging voltage is present in order to share charge between battery banks. However, due to the P12 Battery Charger’s ability to independently optimize charging for each battery bank it is favorable to isolate all battery banks by disengaging the ACR(s) ability to combine.
NOTE: The P12 Battery Charger can integrate with up to two Automatic Charging Relays (ACRs)
1.Disconnect the DC Negative (Ground) wire going to the ACR.
2.If present, disconnect the Start Isolation wire connected to ACR.
3.Connect a wire from the ACR 1 port marked “SI” (Start Isolation) on the P12 Battery Charger to the Start Isolation terminal (SI) on the ACR.
4.Connect a wire from the ACR 1 terminal marked “ES” (Engine Start Switch) on the P12 Battery Charger to the terminal or wire running from the start key switch to the starter solenoid. Make this connection through an
NOTE: This connection can be made at the start key switch or at the starter solenoid, but must be to the line that is +12V DC positive only when cranking. Connection to a line that is positive while the engine is normally running will prevent the charging relay from working properly.
5.
6.If connecting two ACRs, repeat steps 1 through 5 using the second ACR, engine, and the P12 Battery Charger ports associated with ACR 2
SI ES | ES SI |
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ACR 1 | ACR 2 |
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SI: Start Isolation (ACR) | Temperature | Remote | |
ES: Engine Start Switch | Sensor | Display | |
OPTIONAL CONNECTION
| FUSE |
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ENGINE |
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START |
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SWITCH | ON |
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| START |
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| OFF |
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| Automatic | ||
| Charging | ||
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| Relay |
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| FUSE |
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| GROUND | START ISOLATION | REMOTE LED |
START | FUSE |
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OPTIONAL CONNECTION
SI ES | ES SI |
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ACR 1 | ACR 2 |
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SI: Start Isolation (ACR) | Temperature | Remote |
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ES: Engine Start Switch | Sensor | Display |
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| 7520 |
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| BATTERY CHARGER LED REMOTE |
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| Automatic |
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| Charging |
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| Relay |
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FUSE |
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| GROUND | START ISOLATION REMOTE LED |
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| HOUSE |
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| FUSE |
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| FUSE | ENGINE |
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| START |
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| SWITCH | ON |
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| START |
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| OFF |
DC GROUND
START
22Specifications are subject to change. See bluesea.com/P12 for current information.