Power Supply; Operation Modes - Siemens FDCIO223 Technical Manual

Structure and function
3
Function

3.3.3 Power supply

3.3.4 Operation modes

30 | 72
Building Technologies
Fire Safety
The primary side (FDnet/C-NET) is always supplied with power via the FDnet/C-
NET detector line.
The secondary side must always be supplied with power via an external DC 24 V
power supply. The primary and secondary sides are electrically isolated. In
addition, any inputs/outputs that are configured as contact inputs are electrically
isolated from the 24 V power supply.
External power supply DC 24 V
NOTICE
No fusing of the 24 V power supply on the input/output module
Damage to the device due to nominal currents >2 A
To safeguard the device, the 24 V power supply must be protected with a fuse
of max. 2 AT.
The currents for both control lines are provided by the 24 V supply directly.
The control lines can be operated either with 2x 1 A or 1x 1.5 A. Therefore,
each control line must be protected with a fuse of max.1 AT or 1.5 AT,
depending on its configuration (internal fuses up to max. 0.7 AT).
The external power supply for the input/output module FDCIO223 must be
ungrounded and should feature short-circuit monitoring.
The external power supply must be monitored.
It is not necessary to use electrically isolated power units, as the supply is
already electrically isolated in the input/output module FDCIO223.
The fire control panel's power supply can be used.
Also observe the information in chapter 'Using two detector lines simultaneously
32]'.
The input/output module FDCIO223 has the following operation modes:
Normal operation
Test/inspection
Localization
Normal operation
The input/output module FDCIO223 is running in intended operation. The inputs
are monitored and evaluated. The outputs can be triggered.
Test/inspection
With test mode/inspection mode, the input/output module functions according to
how the input/output and fire control panel are configured.
Activation of the outputs in test mode/inspection mode will merely be signaled by
means of LEDs on the input/output module.
If the input/output module FDCIO223 is operated with a control panel FC20xx or
FC72x, no control outputs will be triggered in the event of activation of these
control panels in test mode/inspection mode. The input/output module FDCIO223
itself does not switch to test mode/inspection mode in this case. LEDs 12a and 12b
do not indicate any status.
009122_h_en_--
2016-05-04