Siemens SIPART DR22 Manual page 18

1 Technical Description
1.4 Function principle
1.4.2 Description of the option modules
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6DR2801-8E Module with 2 BE and 4 BA
D Digital signal module with 2 digital inputs and 4 digital outputs
The module serves to extend the digital inputs and digital outputs already existing in the stan-
dard controller.
The inputs are designed for the 24 V logic and are non-floating. The functions are assigned to
the inputs and outputs by the configuration of the controller.
The digital outputs are short-circuit-proof and can drive commercially available relays or the
interface relays 6DR2804--8A/8B directly.
6DR2801-8C Module with 5 BE
D Digital input module with 5 digital inputs
The module serves to extend the digital inputs already existing in the standard controller.
The inputs are designed for the 24 V logic and are non-floating. The function is assigned to the
input by the configuration of the controller.
6DR2802-8A Analog output module with y-hold function
For auxiliary control device function when servicing and for extending the analog outputs AA1 to
AA3 existing in the standard controller.
Can be inserted in slot 5/6, S22/S23=4 to be set in the structure mode StrS,
Start value of the outputs S72/S249 can be set in StrS.
The y module contains a microprocessor which maintains serial data communication with the
hold
processor on the main board through the Rxd/Txd lines. The processor feeds the U/I converter
and the CPU fault message output St through its analog output. The module can be externally
supplied through an auxiliary voltage input which is OR--linked with the controller power supply.
The analog output of the module is freely available.
-- y -function
hold
If data communication to the y
value. The processor reads the current variable first when data traffic is recovered. The out-
put current is maintained if:
16
WARNING
The relays used on the digital output module are designed for a
maximum rating up to UC 35 V. The same applies for the air and creep
lines on the circuit board. Higher voltages may therefore only be
switched through appropriately approved series connected circuit
elements under observance of the technical data and the pertinent
safety regulations.
processor is interrupted, the analog output receives its last
hold
Manual
SIPART DR22 6DR2210
C79000-G7476-C154-03