Saia-Burgess Controls AG
Manual I/O-modules for PCD1 │ PCD2 series │ Document 27-600 – Release ENG09 │ 2019-05-01
6-101
I/O modules PCD3
PCD3.W525
6
Function
Power supply
PCD3.W525s must have an external power supply. This power supply is
electrically isolated from both the Saia PCD
®
and the inputs/outputs of the W525.
The design also allows the use of the same power supply for the PCD and the
W525 without losing the galvanic separation. The diagram below shows the
various areas of separation:
Timing
● Inputs
○ Internally, the W525 captures a new value for each input channel every 2 ms
○ This value can be read by the Saia PCD
®
at any time.
○ Depending on the speed of the Saia PCD
®
, the transmission time for each
individual value scaled to 16 bit (14 bit → 16 bit) (for a single input channel)
is normally 100 μs.
● Outputs
○ Internally, the W525 outputs the last output value received from the Saia
PCD
®
with a maximum delay of 2 ms.
○ Depending on the speed of the Saia PCD
®
, the transmission time for each
individual output value scaled to 16 bit (12 bit → 16 bit) is normally 100 μs.
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