27
Smart Infrastructure
A6V10393190_h_en_--
2019-09-01
Functionality 'Supervised line':
The panel monitors the line in terms of open and short circuits from the panel to the
EOL element.
In addition to the line monitoring, the panel will recognize a change of line resistance.
Due to aging or other circumstances (creeping effect), the transition resistance on
contacts may increase, which in turn leads to voltage drop.
In order to detect the creeping effect (supervision), the line must be calibrated during the
commissioning process. A line fault is indicated if the resistance is higher than 35
Ω
.
Checking the line resistance depending on the required current
It is calculated that the supply of the connected devices is met.
The picture shows the dependence of the line resistance (R Line) in relation to the device
voltage (U
min
) and the available output current (
I
max
) and the minimum required current of
the connected devices (
I
Load).
Procedure for determining the maximum available device current (
I
Load):
1) Determine the line resistance R Line.
Programming: see chapter 7.2.1 (Calibration)
Configure
à
Output
à
Output 4 – n
à
Calibrate line
2) Detecting the voltage U
min
according to the device datasheet.
3) Verification: Are all parameters satisfied for the correct operations?
Table 1 can be used for this check, here are maximum values shown.
Details are individual to calculate.
Table 1
I
max
R Line
U
min
= 9 V
U
min
= 14.5 V
U
min
= 16.8 V
U
min
= 18 V
1 A
0 ~ 7
Ω
0 ~ 3.5
Ω
0 ~ 2
Ω
0 ~ 1
Ω
0.5 A
0 ~ 14.5
Ω
0 ~ 7.5
Ω
0 ~ 4.5
Ω
0 ~ 3
Ω
0.3 A
0 ~ 25
Ω
0 ~ 13
Ω
0 ~ 8
Ω
0 ~ 5.5
Ω
0.1 A
0 ~ 35
Ω
0 ~ 35
Ω
0 ~ 26
Ω
0 ~ 18.5
Ω
0.05 A
0 ~ 35
Ω
0 ~ 35
Ω
0 ~ 35
Ω
0 ~ 35
Ω
Counteractive measures: Reduction of
I
Load or of R Line.
Functionality 'Supervised line for fault dialer and relay':
The line is supervised, from the terminal including the activated relay in the fault dialer, in
terms of open and short circuit. In addition to the line supervising, the panel will recognize
a change of line resistance. Due to aging or other circumstances (creeping effect), the
transition resistance on contacts may increase, which in turn leads to voltage drop.
OUT A
R Line
EOL
Load
