7
Electrical installation
Safe digital outputs (F-DO.)
Manual – MOVISAFE
®
CS..A Safety Card (Version 2)
62
7.6.5
Information about line diagnostics and test pulses
For monitoring of the cabling, the output circuit uses test pulses and thus detects
faults in the external wiring. This means the output voltage is interrupted briefly
(pulsed). The maximum duration of the interruption can be set in the F-DO parameter
Maximum test duration
. The required duration of test pulses is determined by the ca-
pacitances in the connected load, which affect the line diagnostics.
For the safe disconnection of MOVISAFE
®
CS..A with a maximum of 10 MOVIDRIVE
®
modular, MOVIDRIVE
®
system, and MOVIDRIVE
®
technology devices, a test pulse
duration of 1 ms is to be used.
Total capacitance must not exceed 1 µF with the maximum test pulse duration
(5000 ms).
For the 24 V switching outputs F-DO00 and F-DO01, line diagnostics is always active
regardless of the parameterization.
WARNING
When line diagnostics is deactivated, the MOVISAFE
®
CS..A safety card cannot de-
tect a short circuit between a sourcing output (F-DO._P) and the +24 V supply
voltage or between an M switching output (F-DO._M) and the reference potential.
Severe or fatal injuries.
Install the wiring in such a way that no short circuit is possible:
•
Between a sourcing output (F-DO._P) and the +24 V supply voltage.
•
or between an sinking output (F-DO._M) and the reference potential.
The outputs F-DO00 and F-DO01 are equipped with an optional wire break monitor-
ing. The wire break monitoring checks whether the connected actuator is consuming a
minimum current. If the actuator current is below the minimum value, the
MOVISAFE
®
CS..A safety card detects this as an open circuit.
Activate wire break monitoring only if you are sure that the current consumption of the
actuator is always above the minimum current (see chapter "Technical data" > "Safe
digital outputs").
28482271/EN – 03/2019
