I don't think Whelen ever dubbed these controllers as the ESC-3000. Actually, the model isn't listed on the front panels for the sirens.
As far as other systems with this particular logic board here's a few off the top of my head:
Seabrook: WS-3000s, upgraded to ESC-2020s
St. Louis County: WS-3000s and WS-2000Rs, replaced with WPS-2910s
Millstone and Yankee Nuclear Plants: various WS-2000 series sirens with some late generation WS-1000s, Millstone system replaced with WPS-2910s and Yankee system abandoned with some still in use as fire sirens
Columbiana, OH: WS-2000-115
Foley, MN: WS-2000-118? (WS-2020)
Livingston, WI: WS-2000-115
Branson, MO: WPS-2750 (possibly, one of the few remaining units has a speedy wind down)
North Pekin, IL: WS-3000s
Rich Fountain, MO: WS-2000R
River Falls, WI: WS-3000s, replaced with Vortex-R4s
Zion, IL: WS-3000 (possible give their older rotators), system abandoned
Bedford Park, IL (plant system): WS-3000s
Perry Nuclear Plant: WS-3000s and WS-2000-115, replaced with 2001-SRNs and Equinoxes with some now serving Fairfield County, OH's system
Owensville, MO: WS-3000s, replaced with WPS-2906s
Ida, MI: WS-2000R, fire siren
Fermi Nuclear Plant: WS-3000s and WS-2000-115, replaced with 2001-SRNs with some now serving Monroe County, MI's system
Turkey Point Nuclear Plant: WS-3000s (possibly based on rotators, probably upgraded in the '80s for two-way)
Idaho Falls, ID: WS-3000
Menomonie, WI: WS-3000s and WS-2000-115s (three arrays), replaced with 508s
Blairsville, GA: WS-2000-115
Livonia, MI: WS-2000s? (these had really odd panels, not too sure what they had inside), replaced with WPS-3000s and 2001-SRNs
The one in Dearborn County, IN does have this older controller, however it was shipped with the 500 Hz option. Given the nature of these analog panels, the pitch isn't an exact match, but that is indeed one of the older controllers. Also the Mount Pleasant, MI WS-1000s have an entirely different controller. It's the original controller that came with those back in the '70s and has a single 1000-watt amp instead of the 160 or 320-watt amps that the later controllers had; you are reading this correctly as the drivers in the had are rated for 80 watts at 11 ohms, the WS-3000 and WS-2000-115 are 1280 watt sirens, and they do 1600 watts in voice. We have a rough idea of how they sound on the windup but no idea about the wind-down since this is the only video of one running with that particular controller.
https://www.youtube.com/watch?v=2bOQJOI5-pA
Before anyone mentions it, the sirens in Newton County, GA are not Whelen WS-1000s. They appear to be Loudoun ES-1000s. To my knowledge, Whelen never actually sold the 1000 with just four speakers, and the drivers had covers on them. These supposed Loudon sirens' drivers are exposed to the elements. That county in particular also has some Loudoun sirens that use the same setup but with Atlas DR-42 horns instead of CJ-46s. Those run on the same panels as the ES-2000, and the mounting bracket between both is the same. Their drivers are exposed as well, so there's a good chance that both are actual ES-1000s with the CJ-46 equipped units being early versions of the sirens and the DR-42 equipped units being later models. Cobb County also has a couple of these sirens that are inactive. Besides this, I think these sirens were installed in the '90s, which is well and truly into the 2700 and 2800 era.