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II - DCE FEL ČVUT v Praze

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Analog value formation<br />

Measuring principle SIGMA-DELTA<br />

Integration time/conversion<br />

time/resolution (per channel)<br />

Configurable<br />

Integration time in ms<br />

Basic conversion time,<br />

incl. integration time in<br />

ms (one channel<br />

enabled)<br />

Basic conversion time,<br />

incl. integration time in<br />

ms (two channels<br />

enabled)<br />

Resolution in bit + sign<br />

(incl. overrange)<br />

Interference voltage<br />

suppression for<br />

interference frequency<br />

f1 in Hz<br />

I/O Modules with Intrinsically-Safe Signals<br />

C79000-G7076-C152-04<br />

yes yes<br />

2.5 162 yes yes<br />

/3 20 100<br />

2.5 162 /3 20 100<br />

7.5 50 60 300<br />

10+<br />

sign<br />

Interference suppression, error limits<br />

13+<br />

sign<br />

13+<br />

sign<br />

15+<br />

sign<br />

400 60 50 10<br />

Interference voltage suppression for f = n x (f1 1 %),<br />

(f1 = interference frequency)<br />

Common-mode interference<br />

Channels with respect to<br />

earth terminal of CPU<br />

(UISO < 60 V)<br />

> 130 dB<br />

Series-mode interference<br />

(measured value +<br />

inter-ference must be within<br />

the input range 0 to 22 mA)<br />

> 60 dB<br />

Crosstalk attenuation between<br />

inputs (UISO < 60 V)<br />

> 130 dB<br />

Operational limit (in total temperature range, referred to<br />

input range)<br />

from 0/4 to 20 mA 0.45 %<br />

Basic error limit (operational limit at 25 C, referred to<br />

input range)<br />

from 0/4 to 20 mA 0.1 %<br />

Temperature error (referred to<br />

input range)<br />

Linearity error (referred to input<br />

range)<br />

Repeatability (in steady-state<br />

condition at 25 C, referred to<br />

input range)<br />

0.01%/K<br />

0.01 %<br />

0.05 %<br />

SIMATIC S7 HART Analog Modules<br />

Interference suppression, error limits, continued<br />

Influence of a HART signal modulated onto the input<br />

signal, referred to input range<br />

Error at integration time<br />

2.5 ms 0.25%<br />

162 /3 ms 0.05%<br />

20 ms 0.04%<br />

100 ms 0.02%<br />

Interrupts, diagnostics<br />

Interrupts<br />

Hardware interrupt configurable<br />

channels 0 and 1<br />

Diagnostic interrupt configurable<br />

Diagnostic functions configurable<br />

Group fault indication red LED (SF)<br />

Channel fault indication red LED (F) per<br />

channel<br />

Diagnostic information<br />

readout<br />

possible<br />

HART communication<br />

active and OK<br />

green LED (H)<br />

Data for transducer supply<br />

No-load voltage<br />

< 29.6 V<br />

Output voltage for<br />

transducer and line with<br />

22 mA transducer current<br />

(50 resistor on module<br />

taken into account)<br />

> 15 V<br />

Data for sensor selection<br />

Input ranges (rated values /<br />

input resistance)<br />

Current 0 to 20 mA;<br />

4 to 20 mA:<br />

Permissible input current for<br />

current input (destruction limit)<br />

Signal sensor connection<br />

40 mA<br />

for current measurement<br />

as 2-wire transducer possible<br />

as 4-wire transducer possible<br />

/50 Ω<br />

/50 Ω<br />

4-19

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