USER HANDBOOK 1.2 | ECC DIO / ECC AIO
Berghof Automation GmbH | Harretstrasse 1 | 72800 Eningen | www.berghof.com
250000600_ECC-DIO-AIO_Anwenderhandbuch_EN.docx
30
Operating mode: voltage input AI (I)
Feature
Value
Description
Connections per input
–
AI (I) and AGND; connect screening with AGND.
Protection
–
Thermal current limitation
Measuring range
–20 to +20 mA
Technical current direction into AI (I)
Load impedance
typ. 20
Ω
–
Max. errors at 25 °C
±2,000 ppm (±40 µA)
–
Temperature
coefficient
±40 ppm/K
(±0.8 µA/K)
–
Digital resolution
24 bit
–
Data format in the user
program
32 bit real
(floating-point number) in milliamps (mA)
Maximum permissible
permanent overload
Max. ±25 mA
–
Output of digital value
in case of overload
–
If a current greater than ±20 mA flows into an AI (I),
a plausible value is still given up to
approx. ±25 mA.
The specified accuracy is only valid for the
range –20 to +20 mA.
Input type
–
Current measurement compared to AGND
Reference potential
AGND
–
Dynamic characteristics
Analogue filtering
Second-grade low-
pass filter; time
constant T = approx.
215 µs
–
Greatest temporary
deviation during
electrical error testing
according to
IEC 61131-2
0.5% of measuring
range
–