Hardware Manual for the PCD2.M5 Series│Document 26/856; Version EN 12│2014-07-24
Saia-Burgess Controls AG
Analogue combined input/output modules
Input/output (I/O) modules
6-83
6
Filters
●
Inputs
There are two factors used to filter the captured values:
○
The basic hardware filter with a time constant of 2 ms. This filter
attenuates the input signal by 6 dB per order of magnitude at a
switching frequency of 80 Hz.
○
The software also has an effect. This results in a delay to the captured
value of 2 ms with a notch filter property at 500 Hz, where no software-
based filter with 50 Hz/60 Hz has been selected.
Where a 50 Hz (60 Hz) filter is used, the frequency of the notch filter is 50 Hz
(60 Hz); in this case, the delay is also 2 ms.
●
Outputs
Only the hardware-based filer with a time constant of 1 ms is active.
Technical data
Inputs
General:
Resolution:
14 bit
Measurement type:
differential
Number of channels:
4
Galvanic separation of the PCD:
yes, 500 V
Galvanic separation of external supply:
yes, 500 V
Galvanic separation between channels:
no
Type of connections:
two cables per channel
Configuration of operating mode:
using DIP switches
Accuracy at 25 °C:
± 0.2% max.
Repeat accuracy:
± 0.05% max.
Temperature drift (0…55 °C) max.:
± 70 ppm/°C
Overvoltage protection:
± 50 V min.
Overcurrent protection:
± 35 mA min.
Common mode max. voltage:
± 50 V min.
Common mode rejection:
70 dB min.
Filter:
Time constant for hardware filter:
2 ms
Attenuation of software-based 50 Hz filter:
40 dB min. between 49.5 and 50.5 Hz
Attenuation of software-based 60 Hz filter:
40 dB min. between 59.5 and 60.5 Hz
Voltage mode:
Resolution range 0
…
10 V mode:
14 Bit; 0.61 mV per LSB
Current mode:
Current shunt resistance:
125
Ω
Resolution range 0
…
20 mA:
14 Bit; 1.22
µA per LSB
Resolution range 4
…
20 mA:
13.7 Bit; 1.22
µA per LSB
Temperature / resistance mode:
Resolution for Pt1000; range -50 …
400 °C
0.1 °C
Resolution for Pt500; range -50 …
400 °C
0.2 °C
Resolution for Ni1000; range -60 …
200 °C
0.1 °C
Resolution for resistor; range 0 …
2500
Ω
0,2
Ω
Shunt capacity for temp sensor / resistor:
2.5 mW max.