KROHNE IFC 020 K Installation And Operating Instructions Manual page 16

2.4 Input / output connection diagrams
Terminal identification
E: X2
IFC 020 E
F
IFC 020 F
K
IFC 020 K
I Current output C
P Pulse output
S Status output RS 485 Interface
Current output
1
I
active
+
≤ 15 V DC
U
ext
I
I = 0/4 - 20 mA
U
≤ 500 Ω
R
i
R
For connection and operation of the HART® interface,
see Section 6.1. Load at HART® operation ranges between min.
Ω Ω
250 and max. 500 .
Pulse output P
passive
3
for electronic (EC) or
electromechanical (EMC) totalizers
U
ext
I
max
≤ 30 V DC/≤ 24 V AC
U
ext
≤ 150 mA
I
max
(incl. status output S)
2/3
separated, 19" plug-in unit, connection cap X2
separated, field housing
compact
Control input (IFC 020 E only)
Current output
2
I
passive
U
ext
= 0/4 - 20 mA
15...20 V DC 20...32 V DC
ext
0...500 Ω 250...750 Ω
i
Installation and operating instructions IFC 020
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.
Pulse output P
4
for electronic (EC) totalizers
with and without current output I
≤ 15 V DC from current output
U
int
Operation with current output:
≤ 3 mA
I
max
Operation without current output:
≤ 23 mA
I
max
15 V
R ≤
I
max
Totalizer
- electronic (EC)
- electromechanical (EMC)
Milliammeter
0 or 4-20mA and others
Key, N/O contact
External voltage source (U
DC or AC voltage,
connection polarity arbitrary
DC voltage,
external power source (U
note connection polarity
(and current output I
active
),
ext
),
ext
)
active