KROHNE IFC 020 K Installation And Operating Instructions Manual page 70

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