KROHNE UFM 530 HT EN - Manual (Page 25)

ELECTRICAL CONNECTIONS
4
25
UFM 530 HT
www.krohne.com 12/2013 - 4002393201- HB UFM 530 HT R02 en
4.4.2 Ex versions
WARNING!
The electrical input and output signals must be connected in passive mode. The supply voltage
must be provided from an external source.
Ex standard version
Figure 4-7: Terminals for Ex standard instrument
Terminal Function Specification
1 Neutral mains power supply 100...240 VAC, 24 VAC or 24 VDC
2 Live mains power supply 100...240 VAC, 24 VAC or 24 VDC
3 Combined current output (I) and digital
input (C). Current output (I) includes
HART
® -Communication.
Current output (I): I ≤ 22 mA,
R
load
≤ 680 Ω, U
max
= 15 VDC.
Digital input (C): low = 0...5 VDC,
high = 15...32 VDC (will be switched off
when current output activated).
4 Pulse / frequency output I
max
= 150 mA, U
max
= 32 VDC / 24 VAC,
maximal frequency = 2 kHz.
5 Analog input 2, for temperature or
pressure measurement. 0(4)...20 mA, R
i
= 58,2 Ω, fuse = 50 mA.
6 Analog input 1, for temperature
measurement. 0(4)...20 mA, R
i
= 58,2 Ω, fuse = 50 mA.
7 Common ground