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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Analogue channel wiring
Ensure the following connection requirements are met so as to guarantee the measuring accuracy of the
device:
Use analogue cables with a braided shield.
Separate the laying of analogue cables and power cables. Where required, install metallic shielding in
cable channels.
Earth the screen at the place where it enters the control cabinet.
Connect the screen close and directly with AGND.
Data from analogue inputs
Data from analogue inputs
Feature
Value
Description
Cable length
max. 30 m
Only valid for unshielded connection cables
Cables over 30 m in length must be shielded
Modulation method
Delta-sigma modulation
–
Shared points between
the channels
AGND reference
ground
–
Calibration frequency
12 months
Maintenance of accuracy class
Clamp arrangement
Shielding on common
AGND pins
–
Sampling duration/rate
for measuring values
1 ms
A reading is taken from each input channel every
millisecond, regardless of how many channels are
actually in operation.
Sampling rate
Operating mode AI-PT
250 ms
In operating mode AI-PT, calculations are carried
out after the millisecond sampling rate. A new
value is available in the user program every
250 ms.
Digital filtering
Possible filter
settings
Time range for averaging
Time range for averaging
Operating mode AI-PT
10
10 ms
2.5 s
100
100 ms
25 s
1,000
1,000 ms (1 s)
250 s
If filtering is active, an average is calculated for the set time range. However a value is still issued during the
sampling rate interval. For example, if the filter is set to 1,000, the average of the measurements for the
previous 1,000 ms / 1,000 measurements is issued each millisecond (or, in the case of operating mode
AI-PT, the average for the last 250 ms / 1,000 measurements).
The filtering can be activated and configured using CODESYS V3. The sampling rate is constant. It can only
be filtered with a whole multiple of the sampling rate.
