KROHNE IFC 090 Converter EN - Manual (Page 72)

Versions K = contact F = separate, field housing
IFC 090 K/B and F/B (standard) Basic version, without local display and control elements
IFC 090 K/D and F/D (option) Display version, with local display and control elements
IFC 090 K/D-EEx Hazardous-duty version with outputs in Increased Safety
Interface (option) HART
Add-on equipment (option) CONFIG software and adapter for operator control via
MS-DOS PC, connection to internal IMoCom interface
(equipment bus)
Current output
Function
– all operating data settable
– galvanically isolated from all output and input circuits
– for active or passive mode (Ex version only active)
Current: fixed ranges 0 – 20 mA and 4 – 20 mA
variable ranges for Q = 0% I
0%
= 0 – 16 mA adjustable in 1mA
for Q = 100% I
100%
= 4 – 20 mA increments
for Q > 100% I
max
> 20 up to 22 mA maximum
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 / 22 mA and variable
Forward/reverse flow measurment direction identified via status output
Pulse output
Function
– all operating data settable
– galvanically isolated from current output and all input circuits
– digital pulse division, interpulse period non-uniform,
therefore if frequency and cycle meters connected
allow for minimum counting interval:
gate time, totalizer
≥
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 automatic: pulse duty cycle 1:1, max. 1000 pulses/s = 1 kHz
variable: 10 ms – 1 s P
100%
[pulses/s] = f
max
[Hz] =
Forward/reverse flow measurement flow direction identified via status output
Status output (passive)
Function
settable as measuring range identification for BA mode,
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
10/3
10.4 IFC 090 Signal converter
}
1000
P
100%
[Hz]
1
2x pulse width