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Saia-Burgess Controls AG
Manual
Manual PCD 1 / PCD 2 Series
│ Document 26
/
737 E
N22 │ 2013-11-26
5
Input/output (I/O) modules
5-89
Analogue output modules with electrically isolation
Block diagram
OP-Amp output stage
A0
COM
A1
COM
A2
COM
A3
COM
A4
COM
A5
COM
D
AC
Reference
Voltage 2.5 V
μ
Controller
PCD Bus
I/O Bus
DC / DC
converter
Galvanically
separated
interface
Electrical isolation
VCC
COM
+5 V GND
Filter
+Uin
-Uin
Programming
Classic: For programming the modules, an FBox is available.
xx7 and RIOs: the firmware reads in the values according to the configuration (I/O
Builder or network configurator)
Watchdog: This module can be used on all base addresses; there is no interaction
with the watchdog on the CPUs. For details, please refer to the
“Watchdog”
section
, which describes the correct use of the watchdog in conjunction with PCD2
components.