KROHNE IFC 020 Short EN - Manual (Page 12)

Condensed instructions IFC 020 2/3
2.4 Input / output connection diagrams
Terminal identification
IFC 020 E separated, 19” plug-in unit, connection
IFC 020 F separated, field housing
IFC 020 K compact
For connection and operation of the HART® interface,
see section 6.1. Burden (load) at HART® operation ranges
between min. 250
Ω and max. 500 Ω .
E: X2
F
K
I Current output C Control input (IFC 020 E only)
P Pulse output
S Status output RS 485 Interface
1 2
I = 0/4 - 20 mA
U
ext
15...20 V DC 20...32 VDC
R
i
0...500 Ω 250...750 Ω
U
ext
≤ 15 V DC
I = 0/4 - 20 mA
R
i
≤ 500 Ω
Current output
I
active
Current output
I
passive
Active mode
The current output supplies the power for
operation of the outputs and inputs.
Passive mode
External power source required for operation of
the outputs and inputs.
3 4
Pulse output P
passive
for electronic (EC) or
electromechanical (EMC) totalizers
U
ext
≤ 32 V DC/≤ 24 V AC
I
max
≤ 150 mA
(incl. status output S)
U
int
≤ 15 V DC from current output
Operation with current output:
I
max
≤ 3 mA
Operation without current output:
I
max
≤ 23 mA
R ≤
15 V
I
max
Pulse output P
active (and current output I
active
)
for electronic (EC) totalizers
with and without current output I
Totalizer
- electronic (EC)
- electromechanical (EMC)
Milliammeter
0 or 4-20mA and others
Key, N/O contact
External voltage source (U
ext
),
DC or AC voltage,
connection polarity arbitrary
DC voltage,
external power source (U
ext
),
note connection polarity
U
ext
U
ext
I
max
+