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Wiring Differences: NS2 vs. old Ample regulator

PostPosted: Mon Jun 18, 2012 8:57 am
by PhilG57
I've replace an older Ample Next Step Regulator (blue cover) with an NS2. All is well except the red warning light in the cockpit which indicates the alternator is not charging, no longer works. This warning light should illuminate when the boat engine controls are turned on, but the engine is not yet started. Once the engine fires up and the regulator/alternator kick in, the warning light should go out.

The old Ample regulator had a lead to enable the above warning light but I do not see an equivalent lead on the NS2. So, after replacing the older regulator with the NS2, I now have an "extra" wire.

What lead on the NS2 will again enable the 'alternator not charging' warning light to be used?

Thanks.

Re: Wiring Differences: NS2 vs. old Ample regulator

PostPosted: Mon Jun 18, 2012 11:05 am
by Coulomb
What was the model number on the old regulator?

Re: Wiring Differences: NS2 vs. old Ample regulator

PostPosted: Tue Jun 19, 2012 2:59 am
by PhilG57
The battery bank is 24vdc. The old regulator was model 24P with a serial number of N2595. Thanks.

Re: Wiring Differences: NS2 vs. old Ample regulator

PostPosted: Tue Jun 26, 2012 1:15 pm
by PhilG57
Any update here? I'm hoping to be able to use the "not charging" warning light in the cockpit with my new NS2. Thanks.

Re: Wiring Differences: NS2 vs. old Ample regulator

PostPosted: Thu Jul 12, 2012 7:12 am
by PhilG57
Any update? When you asked for the model number of my old regulator, I hoped you might be able to help. Can you please let me know if you are still researching the answer or cannot provide an answer? That way I'll know where I stand. Thanks.

Re: Wiring Differences: NS2 vs. old Ample regulator

PostPosted: Thu Jul 12, 2012 11:19 am
by Coulomb
The P type regulators did not interface to the normal indicator like automotive units.

We'd have to see how the other regulator was wired to make any further suggestions.

Re: Wiring Differences: NS2 vs. old Ample regulator

PostPosted: Mon Jul 23, 2012 11:46 am
by PhilG57
I hope you understand my previous regulator was an Ample 24P, not some other brand. I'm pretty certain the warning light was just wired to one of the normal lugs. Did my 24P have any outputs which are not present on the NS2? Thanks.

Re: Wiring Differences: NS2 vs. old Ample regulator

PostPosted: Mon Jul 23, 2012 2:09 pm
by Coulomb
The original Next Step asserted the error signal to ground to show the error.

The NS2 and the SARV3 both assert the signal positive.

Re: Wiring Differences: NS2 vs. old Ample regulator

PostPosted: Tue Jul 24, 2012 4:27 pm
by PhilG57
Thank you for the update.

After studying the Installation and Operating Instructions for the old NEXT 24P, the SAR V3, and the NS2, and reading carefully your last message, it looks to me the original 24P error lug "enabled" current to flow from some external positive voltage source, through an error lamp, into the 24P regulator and onto the regulator's ground. While the SAR V3 and NS2 just throw a positive voltage onto the error lug to light up an error lamp which is grounded at the ship's ground.

Is this English description halfway close to the actual engineering and implementation? Knowing how they work will help me to figure out a way to light my error lamp when the NS2 regulator is on but not charging.

Thanks.

Re: Wiring Differences: NS2 vs. old Ample regulator

PostPosted: Wed Jul 25, 2012 3:26 pm
by Coulomb
Yes, connect the NS2 to the light, and ground the other end of the light. Observe polarities if the light is an LED.