Instruction Manual

ELECTRICAL CONNECTIONS 4
29
UFM 530 HT
www.krohne.com12/2013 - 4002393201- HB UFM 530 HT R02 en
4.5 Connection diagram examples
4.5.1 Current output
Current output active
• V+: 22 VDC at full load, 24 VDC maximum, I ≤ 100 mA
• R
L
≤ 680 Ω
• I < 22 mA
• U
max
= 15 VDC
Current output passive
• U
ext
= 15...24 VDC
(For Ex-i modis versions: U
ext
= 8,1...30 VDC)
• I ≥ 22 mA (for supply)
• For Ex-i modis versions: I = 4..20 mA
• For Ex-i modis versions: R
L
≤ (U
ext
- 8) / 0,022
INFORMATION!
The connection diagrams on the next pages are valid for most versions. However, not all
versions have the same connection possibilities. Versions that don't have the V+ terminal (for
instance Ex versions) can only be connected in a passive way, e.g. by using an external power
supply.
Figure 4-11: Current output (active)
Figure 4-12: Current output (passive)
INFORMATION!
Ex-i modis versions do not have an "I/C" terminal. Use the "I" terminal instead.