Installation and operating instructions
IFC 020
10.3 IFC 020 signal converter
10/3
Versions
with
display / control elements HART
®
and RS 485 interfaces
IFC 020 K
Compact version,converter directly mounted on the signal
converter version
IFC 020 F
Seperate housing fieldversion
IFC 020 E
Seperate housing, 19” Plug-in unit
Current output
Function
– all operating data settable, galvanically isolated
Current:
ranges
0 – 20 mA and 4 – 20 mA
Active mode
max. 500
Ω
load
Passive mode
external voltage:
15 ... 20 V DC
20 ... 32 V DC
load: min. ... max.
0 ... 500
Ω
250 ... 750
Ω
Error identification
0 / 3.6 / 22 mA and variable
Forward/reverse flow measurment
direction identified via status output
Pulse output
Function
– all operating data settable, galvanically isolated
– digital pulse division, interpulse period non-uniform,
therefore if frequency and cycle meters connected
allow for minimum counting interval:
gate time, totalizer
≥
Pulse rate for Q=100%
10, 100 or 1000 pulses/sec.(=Hz), blocked or to your choice
per m
3
, Litre US Gallons or freely selectable unit.
Activ mode
connection: electronic totalizers
voltage: approx. 15 V DC, from current output
load: I
max
< 23 mA, operation without current output
load:
I
max
<
2
3 mA, operation with current output
Passive mode
connection: electronic or electromechanical totalizers
voltage: external, U
ext
≤
32 V DC/
≤
24 V AC
load: I
max
≤
150 mA
Pulse width
– 50, 100, 200 or 500 msec.,selectable at frequencies < 10Hz
– symetric at frequencies < 10Hz
Forward/reverse flow measurement
flow direction identified via status output
Status output
(passive)
Function
settable as indicator for flow direction, errors or trip point
Connection
voltage: external, U
ext
≤
32 V DC/
≤
24 V AC
load current: I
max
≤
150 mA
Control input
(passive)
IFC 020 E only
Function
– adjustable for totalizer reset, or reset setting
outputs to min. values
– initiate function by “low” or “high” control signals
Control signals
U
max
: 24 V
AC
32 V
DC
(any polarity)
low:
≤
1,4 V
≤
2 V
high:
≥
3 V
≥
4 V
Time constant
0.2 – 99.9 s, adjustable in increments of 0.1 second
Low-flow cutoff
Cutoff “on” value: 1 – 19% of Q
100%
, adjustable
Cutoff “off” value: 2 – 20% in 1% increments
1000
P
100%
[Hz]
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