this unit translates standard 4–20 mA

The foot mount design and color-coded wire leads—typically black (common)

preventing nuisance lockout codes caused by high-resistance connections or insulation breakdown

and alarm system integration

Flexible Signal Input: Natively accepts 0 to 10 VDC or 0 to 20 mA (via the included 500-ohm resistor) for seamless integration with varied BAS controllers

Eaton Cutler-Hammer C321KM30 Mechanical Interlock 326058-758 this unit translates standard 4–20The Eaton Cutler Hammer C321KM30 Mechanical Interlock is a critical field installable accessory designed for Freedom Series NEMA size 00, 0, 1, and 2 starters and contactors. Engineered for horizontal mounting configurations, this heavy duty mechanical link ensures positive electrical isolation by preventing two opposing contactors from closing simultaneously. This hardware is essential for reversing motor applications and multi source power transfers