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What is the operating voltage for the Vamp 255 digital inputs?

Issue: Need to know the operating voltage of the Vamp 255 digital inputs.

Product Line: Vamp 255

Resolution: The Vamp 255 has 2 sets of digital inputs. Digital inputs 1-6 are internally wetted with 48Vdc. The other 12 digital inputs operating voltage is defined by the part number ordering code:
A = 40 - 265 VAC/VDC
B = 18 - 36 VDC
C = 40 - 265 VAC/VDC + ARC Protection
D =  18 - 36 VDC + ARC Protection
E = 40 - 265 VAC/VDC + D19, DI20 + ARC channel
F = 18 - 36 VDC + D19, DI20 + ARC channel

Keywords: Vamp 255, Vamp 255 digital inputs, Vamp 255 operating voltage
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