SBC PCD1 Series Manual page 234

Saia-Burgess Controls AG
Function
Power Supply
PCD2.W525 has to be supplied externally! This power supply is galvanically isolated
to both, the Saia PCD
the same power supply for the Saia PCD
isolation. These schematics show the different zones of isolation:
Timing
● Inputs
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Outputs
●
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Filter
● Inputs
There are two factors, which have filtering effects to the acquired values:
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○
In case of use of a 50 Hz (60 Hz) filter, the notch filter frequency is 50 Hz
(60 Hz); the delay remains the mentioned 2ms.
Outputs
●
There is only the hardware based filter with a time constant of 1 ms, which is
active
Manual Manual PCD 1 / PCD 2 Series │ D ocument 26 / 737 EN22 │ 2 013-11-26
and the I/Os of W525. Furthermore, the design allows using
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Internally, W525 finishes acquiring every 2 ms a new value for every
input channel
This value is always ready to be read by the Saia PCD
Dependent on the Saia PCD
16-Bit scaled value (of a single input channel) takes typically 100 μs (on
a PCD2.M480) or 600μs (on a PCD2.M170)
Internally, W525 outputs the last received output value from Saia PCD
with a maximum delay of 2 ms.
Dependent on the Saia PCD
16-Bit scaled output value takes typically 100 μs (on a PCD2.M480) or
600 μs (on a PCD2.M170).
The base hardware filter with a time constant of 2 ms. This filter attenu-
ates the input signal by 6 dB/decade at a cut-off frequency of 80 Hz.
The second influence is caused by software and results in a delay of
the acquired value for 2 ms with a notch filter characteristics at 500 Hz if
no software based 50 Hz / 60 Hz filter is selected.
Combined analogue I/O modules with galvanic isolation
and for W525 without loosing the galvanic
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speed, the transmission time of a single
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speed, the transmission time of a single
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Input/output (I/O) modules
.
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