Siemens FDCIO223

Structure and function
33
Building Technologies
009122_e1_en_--
Fire Safety
2015-10-06
3.4.1.5 Monitoring
The input/output module monitors the detector line for the following criteria:
 Alarm
 Open line (creeping)
 Short circuit (creeping)
 Ground fault (joint)
3.4.2 Configuration as a contact input
The inputs/outputs of the input/output module can be configured as contact inputs.
The following configurations are possible:
Status inputs
Status inputs trigger a status change as soon as they are activated.
Danger inputs
Danger inputs trigger an alarm as soon as the input is activated.
Filter time
The statuses of the inputs are polled several times a second. The following
conditions apply to detecting a change in status:
 The activation signal must be present for at least as long as the filter time (can
be set between 0.5 and 240 seconds).
 The deactivation signal must be present for at least as long as the filter time but
for no more than 2 seconds.
The filter time is used to suppress interfering pulses.
Line monitoring
The input lines can be monitored for the following criteria:
 Open line
 Open line and short circuit
 No monitoring
To facilitate this, resistors must be connected to the lines of the inputs. When a
short-circuit or open line occurs on one of the input lines, a fault message is
transmitted to the control panel.