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
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Operating modes for the analogue inputs
NOTICE
Damage to channel
High voltages can damage analogue channels, stopping them from working
correctly.
Ensure the input voltage does not exceed ±30 V.
Operating mode: voltage input AI (U)
Feature
Value
Description
Connections per input
–
AI (U/T) and AGND or AI (U) and AGND; connect
screening with AGND.
Measuring range
–10 to +10 V
–
Input impedance in
signal range
100 kΩ
between AI (U/T) and AGND or between AI (U) and
AGND
Max. errors at 25 °C
±2500 ppm (±25 mV)
–
Temperature
coefficient
±40 ppm/K
(±0.4 mV/K)
–
Digital resolution
24 bit
–
Data format in the user
program
32 bit real
(floating-point number) in millivolts (mV)
Maximum permissible
permanent overload
Max. ±30 V compared
to AGND
±30 V = max. voltage at AI channel
Output of digital value
in case of overload
–
If a voltage of ±10 V is applied to an AI (U), a
plausible value is still given up to approx. ±15 V.
The specified accuracy is only valid for the range –
10 to +10 V.
From a voltage of ±16 V, the values are distorted
considerably and from +23 V an error bit is set
which can be queried in the application program.
Input type
–
Unsymmetrical voltage metering (single-ended)
Reference potential
AGND
–
Dynamic characteristics
Analogue filtering
Second-grade low-
pass filter; time
constant T = approx.
500 µs
–
Greatest temporary
deviation during
electrical error testing
according to
IEC 61131-2
0.5% of measuring
range
–
