Structure and function
Input/output configuration options (secondary side)
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Building Technologies
009122_h_en_--
Fire Safety
2016-05-04
De-energization of the detector line
With product version ES 41, the collective detector lines are de-energized as
soon as the FDnet/C-NET is current-free.
With all ES versions, the collective detector lines can also be de-energized
individually (control panel-specific).
You will find more detailed information in the fire detection system documentation.
3.4.2.4 Connection of intrinsically safe detectors in ex-zone 1
Safety barrier SB3 can also be connected to the input/output module FDCIO223.
This allows intrinsically safe detectors to be operated in ex-zones 1 and 2. If you
operate the FDCIO223 in conjunction with a safety barrier SB3, the following points
must be observed in particular:
The line resistance must not exceed 50 (excluding the safety barrier
resistance).
If a safety barrier is connected to both inputs/outputs, both barriers must be
connected to the same grounding point.
Specific national requirements always apply when creating installations in
areas at risk of explosion.
If two safety barriers SB3 are used, a maximum of 32 devices may be connected
in total.
NOTICE
Activated ground fault monitoring
Input/output module malfunction
If you are using safety barrier SB3, deactivate ground fault monitoring on the
input/output module.
Circuit
Figure 7: Detector line circuit with intrinsically safe detectors in ex-zone 1+2
Safety barrier SB3 is always required when connecting intrinsically safe ex
detectors for zones 1 and 2.
An EOL22(Ex) end-of-line must always be used to terminate detector lines in
ex-zones 1 and 2.
You will find more information in document 001204.
See also
SB3
EOL22(Ex)
+
I/O
FDCIO223
