User Manual

TECHNICAL DATA

OPTIWAVE 7400-24 C

www.krohne.com12/2015 - 4003518001 - MA OPTIWAVE7400-24-R01-en

8.3 Minimum power supply voltage

Use these graphs to find the minimum power supply voltage for a given current output load.

Non-Ex and Hazardous Location approved (Ex i / IS) devices

Figure 8-2: Minimum power supply voltage for an output of 22 mA at the terminal (Non-Ex and Hazardous Location

approval (Ex i / IS))

X: Power supply U [VDC]

Y: Current output load R

[Ω]

Hazardous Location (Ex d / XP/NI) approved devices

Figure 8-3: Minimum power supply voltage for an output of 22 mA at the terminal (Hazardous Location approval (Ex d /

XP/NI))

X: Power supply U [VDC]

Y: Current output load R

[Ω]