Siemens Add 7 AddFEM - Figure 3-11 Possible Redundancy Configurations; Figure 3-12 Applicable Diodes

AddFEM
Mode of Operation
3-21
AddFEM
C79000–G8076–C900–03
I/O signal Configuration variants
AI
(Analog–Input)
A
B
+
–
+
–
AO
(Analog–Output)
A
B
+
–
+
–
DI
(Digital–Input and
speed detection)
A
B
DO
(Digital–Output)
A
B
B
A
AddFEM Sensor/actuator
Legend:
Figure 3-11 Possible redundancy configurations
1.6 V bi–directional,
e.g. 4 x BZX55 COV8
for $20 mA or $30 mA
1.6 V uni–directional,
e.g. 2 x BZX55 COV8
for 0..20 mA or 4..20 mA
Figure 3-12 Applicable diodes
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