II - DCE FEL ČVUT v Praze

Analog value formation
Measuring principle SIGMA-DELTA
Integration time/conversion
time/resolution (per channel)
Configurable
Integration time in ms
Basic conversion time,
incl. integration time in
ms (one channel
enabled)
Basic conversion time,
incl. integration time in
ms (two channels
enabled)
Resolution in bit + sign
(incl. overrange)
Interference voltage
suppression for
interference frequency
f1 in Hz
I/O Modules with Intrinsically-Safe Signals
C79000-G7076-C152-04
yes yes
2.5 162 yes yes
/3 20 100
2.5 162 /3 20 100
7.5 50 60 300
10+
sign
Interference suppression, error limits
13+
sign
13+
sign
15+
sign
400 60 50 10
Interference voltage suppression for f = n x (f1 1 %),
(f1 = interference frequency)
Common-mode interference
Channels with respect to
earth terminal of CPU
(UISO < 60 V)
> 130 dB
Series-mode interference
(measured value +
inter-ference must be within
the input range 0 to 22 mA)
> 60 dB
Crosstalk attenuation between
inputs (UISO < 60 V)
> 130 dB
Operational limit (in total temperature range, referred to
input range)
from 0/4 to 20 mA 0.45 %
Basic error limit (operational limit at 25 C, referred to
input range)
from 0/4 to 20 mA 0.1 %
Temperature error (referred to
input range)
Linearity error (referred to input
range)
Repeatability (in steady-state
condition at 25 C, referred to
input range)
0.01%/K
0.01 %
0.05 %
SIMATIC S7 HART Analog Modules
Interference suppression, error limits, continued
Influence of a HART signal modulated onto the input
signal, referred to input range
Error at integration time
2.5 ms 0.25%
162 /3 ms 0.05%
20 ms 0.04%
100 ms 0.02%
Interrupts, diagnostics
Interrupts
Hardware interrupt configurable
channels 0 and 1
Diagnostic interrupt configurable
Diagnostic functions configurable
Group fault indication red LED (SF)
Channel fault indication red LED (F) per
channel
Diagnostic information
readout
possible
HART communication
active and OK
green LED (H)
Data for transducer supply
No-load voltage
< 29.6 V
Output voltage for
transducer and line with
22 mA transducer current
(50 resistor on module
taken into account)
> 15 V
Data for sensor selection
Input ranges (rated values /
input resistance)
Current 0 to 20 mA;
4 to 20 mA:
Permissible input current for
current input (destruction limit)
Signal sensor connection
40 mA
for current measurement
as 2-wire transducer possible
as 4-wire transducer possible
/50 Ω
/50 Ω
4-19