Siemens FS20 - Monitored Outputs (I;O Card (Remote Transmission) FCI2007-A1 and I;O Card (Horn;Monitored) FCI2009-A1); Load Decoupled with Diode (en 54)

Defi
ning controls
Monitored outputs (I/O card (remote transmission) FCI2007
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A1 and I/O card (horn/monitored) FCI2009
-
A1)
9
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Building Technologies
008843_v_en_
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Fire Safety
2015
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12
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15
9.1 Monitored outputs (I/O card (remote transmission)
FCI2007-A1 and I/O card (horn/monitored)
FCI2009-A1)
The monitored outputs of I/O cards FCI2007-A1 and FCI2009-A1 may meet
additional normative requirements of EN 54-13. The terminating resistor needs to
be planned in accordance with precise guidelines in order to meet these
requirements. These processes are described in the chapters that follow.
Observing these planning guidelines for the monitored outputs of I/O cards (remote
transmission) FCI2007-A1 and FCI2009-A1 will ensure that, in the event of an
insidious short-circuit or interruption, a fault will be displayed as soon as the limit
values stipulated by the standard are exceeded. The monitored outputs need to be
calibrated during commissioning in order for monitoring to be performed correctly.
The monitored outputs are connected in different ways, depending on how they are
to be used. The following connection types are available:
● Load decoupled with diode in accordance with EN 54
● With load resistance monitoring in accordance with ↑ VdS
● Monitored fault output
Planning is performed in different ways depending on the connection type that is
being used. The chapters that follow describe the planning process in detail.
9.1.1 Load decoupled with diode (EN 54)
The connection type with decoupled load in accordance with EN 54 has the
following features:
● Monitoring is only carried out in an inactive status with reverse polarity.
● The load is decoupled with a diode. Therefore, only the resistance (Reol) at the
end of the line is monitored.
Figure 59: Load decoupled with diode in accordance with EN 54
1
Standard EOL, observe the power dissipation P = U
2
/ Reol
2
Decoupled EOL
Planning steps
1. Determine the load resistance that will be connected at the output (Rload),
e.g. sounder DS10: Rload = 24 V/0.42 A = 57.2 ohm
2. Define the minimum required voltage of the sounder (Uload), e.g. datasheet
DS10: U = 19…29 V -> Uload = 19 V
3. In the dimensioning table, find the row that corresponds to these values and
determine the associated values.
The monitored resistance value must be within the range for the monitoring
resistance, otherwise a fault message will be displayed at the ↑ station. You will
find detailed information about this in document Product data 008837.
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Rload
FCI2007
FCI2009
Rcable
+
Uload
Reol
1
2
D1
D2
Reol