BERGHOF DC2004 - Page 48

USER HANDBOOK 2.0 | DC20XX, ET20XX, ECC21XX SLIM
Berghof Automation GmbH | Harretstrasse 1 | 72800 Eningen | www.berghof.com
Dialog-Controller-DC20XX_EN.docx
48
Operating mode: voltage input AI (U)
Feature
Value
Description
Greatest temporary
deviation during
electrical error testing
according to
IEC 61131-2
1% of measuring range
–
Operating mode: temperature inputs AI-PT
Feature
Value
Description
Connections per input
–
Sensor connection between AI (U/T) and AGND
(if applicable, an additional AI (U) channel is used
for 3-wire measurement)
Possible sensors
PT100 and PT1000
acc. to EN 60751
Accuracy class AA, A, B and C platinum sensors
may be used
Measuring range
–40 to +200 °C
–
Measuring current
(RMS)
0.3 mA
–
Conversion time
250 ms
–
Max. errors at 25 °C
±2100 ppm (±0.5 °C)
–
Temperature
coefficient
±50 ppm/K
(±0.012 °C/K)
–
Digital resolution
24 bit
–
Data format in
user program
2 × 32 bit real
(floating-point number) in Ohms (Ω) and degrees
Celsius (°C)
Linearisation
–
The value in degrees Celsius is calculated from the
resistance value and linearised (6
th
degree
polynomial)
Input type
–
2-wire measurement or 3-wire measurement
Reference potential
AGND
–
Dynamic characteristics
Analogue filtering
Second-grade low-pass
filter; cut-off frequency
650 Hz
–
Greatest temporary
deviation during
electrical error testing
according to
IEC 61131-2
1% of measuring range
–