ID-E270-011GB
33
-
as a technical alarm input.
The input status is analysed on the basis of the monitoring line characteristic resistance
measurement (Table 5.9). The range of the characteristic resistance (including the connecting cables
resistance) is 2.7 kΩ - 16 kΩ. If the monitoring line resistance is outside the determined range, this
condition is treated as an acknowledgement of external devices actuation (variant 1) or external
devices fault (variant 2).
In the control panel, improper conditions are signalled as faults in the following cases:
-
no acknowledgement of external device actuation with an active actuation signal of a
declared relay or potential output;
-
detection of an external device fault.
Table 5.9
Variant
Function
PK or LS assigned
output
Mode dependent on detection line characteristic
resistance
1
Actuation
monitoring
Activated
Non-maskable fault
2k7< R < 16 k
Technical alarm
R <0.9 k R > 30 k
Non-activated
Quiescent mode
2k7< R < 16 k
Technical alarm
R <0.9 k R > 30 k
2
Functioning
inspection
-
Quiescent mode
2k7< R < 16 k
Non-maskable fault
R <0.9 k R > 30 k
3
Technical
alarm
-
Quiescent mode
2k7< R < 16 k
Technical alarm
R <0.9 k R > 30 k
R – characteristic resistance of detection lines together with connecting cables
Monitoring inputs programming variants
Variant 1:
A monitoring line input may be assigned to one of the previously declared outputs (relay or
potential) defined as TYPE-1, TYPE-2, TYPE-3. Then, this input may be used to monitor external
devices actuation after receiving an actuation criterion from the declared output. Monitoring is
enabled approx. 60 seconds after the monitored output is actuated (permissible time of the
controlled device actuation delay). Examples of using a monitoring input assigned to a relay or
potential output are shown in Fig. 5.8 and 5.9.
Variant 2:
A monitoring line input may be programmed to monitor efficiency of, e.g. external devices. It consists
in connecting an NO contact of this device in parallel with the end-of-line resistor in the monitoring
line circuit. The correct condition is observed when the monitoring line characteristic resistance is
within the 2.7 kΩ - 16 kΩ range. An example of connecting the contact in the monitoring line is
presented in Fig. 5.10.
Variant 3:
A monitoring line input may be programmed as a general purpose technical alarm input to be used
by the installer for individual needs.
It operates as an input for monitoring external devices efficiency. In case any resistance within the
line technical alarm range is detected, the technical alarm is evoked. Applicable examples are
presented in Fig. 5.8 and 5.9.
Monitoring line inputs programming
