Bosch Security Systems | 2005-10 | 9922 141 10384 en
Plena Voice Alarm System | Software Manual | Supervision en | 20
5.11 Line supervision
5.11.1 General
Use the Enable box in the Line Supervision block to
enable and disable line supervision. By default, this box
contains a checkmark, which means that Line
supervision is enabled. Line supervision consists of:
• Impedance supervision (see section 5.11.2).
• Short-circuit supervision (see section 5.11.3).
5.11.2 Impedance supervision
The interval and accuracy of the impedance supervision
can be configured. Proceed as follows:
1 Click the Setup button in the Line supervision block
in the Supervision window. A window similar to the
one in section figure 5.2 appears.
2 Select the time between two successive impedance
checks from the Interval drop-down list
(90 seconds, 5min, 15 min, 30 min, 1hour, 5hour,
10 hour, 24 hour).
3 Enter the time at which the line supervision must be
started or put a checkmark in the Immediately box if
line supervision must be started automatically.
4 Select the accuracy of the impedance measurement
from the Accuracy drop-down list (5%, 7.5%, 10%,
15%, 20%).
Note
If all supervision is disabled, the disabled LED
above the fault indicator field is on.
figure 5.2: Line supervision
Note
If EOL (end of line) supervision is used,
impedance measurement is turned off.
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