Handbook OPTIMA S FC 202201
5/26 | OPTIMA-S-FC, Siemens Equipment
Compact Control/Actuator Unit Functionality Description
Compact 
Control/
Actuator 
Unit
Analog
Input
BUS
Communi-
cation
Parameters 
Setup
Hard Wired 
Override
Feedback 
Signal
Feedback 
Values
Main BUS
Com. 
Variables
Power
Supply
SA
DC 0 V (2 
V) ... 10 V
–
AST20
Open, 
Close, V
min
, 
V
max
DC 0 V (2 
V) ... 10 V
Actual 
volume, 
damper 
angle, 
dynamic 
pressure
–
AC 24 V
SM –
Modbus-
RTU
–
Modbus-
RTU
Read/write
: Setpoint,
V
min
, V
max
,
Open, Close
Read: 
Actual 
volume, 
damper 
angle, 
actual 
pressure, 
serial 
number, 
fault/alarm 
messagesSB –
BACnet MS/
TP
–
BACnet MS/
TP
SK – KNX – KNX










