KROHNE IFC 210 E-EEx EN - Manual (Page 80)

Sect. 10.1 Part D Technical Data, Measuring Principle and Block Diagram
IFC 210 E 05/2002
80
Current output
Function - all operating data settable
- galvanically isolated from all output and
input circuits
- for active or passive mode
Current: fixed ranges: 0 - 20 mA and 4 - 20 mA
variable ranges: for Q = 0% I
0%
= 0 - 16mA
for Q = 100% I
100%
= 4 - 20mA
for Q > 100% I
max
= 22mA
}
adjustable
in 1mA
increments
Active mode max. 800
Ω
load
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::
1000
gate time, totalizer
≥
P
100%
[Hz]
Activ mode connection: electronic totalizers
Passive mode connection: electronic or electromechanical totalizers
Electrical data see connection diagrams in Sect. 2.5
Pulse width automatic: pulse duty cycle 1:1,
max 10 000 pulses/Sec = 10 kHz
variable: 10 ms - 1 s
1
P
100%
[pulses/s] = f
max
[Hz] =
2x pulse width
Forward/reverse flow measurement flow direction identified via status output
Status output (passive)
Function settable as measuring range identification for BA
mode, automatic range change,
Overrange, Low Flow Cutoff, indicator for flow
direction, errors or trip point, change-over contact
(Statusoutput B2 inverse to B1)
Electrical data see connection diagrams in Sect. 2.5
Control input (passive)
Function - settable for range change, totalizer reset, error reset,
set outputs to min. values or hold actual output 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 %
Cutoff on value: 2 - 20 %
} of Q
100%
, adjustable
in 1% increments