8
Electrical installation
Safe digital outputs (F-DO.)
Manual – MOVISAFE
®
CS..A Safety Card
58
8.6.7
Actuator (dual-channel, sourcing / sinking output)
F-DO00_P
F-DO00_M
F-DO01_P
F-DO01_M
12
11
14
13
X60
MOVISAFE
®
CS..A
[1]
[1]
9007207666523275
[1] Actuator
Connect the actuator between F-DO._P and F-DO._M. The actuator can still be
switched off in case of a crossfault in one of the connection lines, because the
MOVISAFE
®
CS..A safety option disconnects the sourcing and the sinking output ter-
minals.
The input of the actuator must be isolated and without any connection to a reference
potential. Inside the MOVISAFE
®
CS..A safety option there is a switching element
between F-DO._M and the reference potential. With a non-isolated actuator, this
switching element would be bridged. The redundancy of the sourcing and sinking out-
put would no longer apply.
The sourcing / sinking connection variant is suitable for applications up to SIL 3 pursu-
ant to IEC 61508 and Performance Level e pursuant to EN ISO 13849-1.
Fault detection using line diagnostics
The MOVISAFE
®
CS..A safety card detects the following faults in the external cabling
when the output is switched on or off:
•
Short circuit between sourcing output and a supply voltage that lies within the
range of 15 - 30 V and has the same ground potential as the MOVISAFE
®
CS..A
safety card.
•
Short circuit between the sinking output and the reference potential or a voltage
< 6 V.
The MOVISAFE
®
CS..A safety card also detects the following faults when the output is
activated:
•
Short circuit between different sourcing outputs
•
Short circuit between different sinking outputs
•
Short circuit between sourcing output and sinking output
•
Short circuit between sourcing output and GND
•
Overload at every output
•
Open circuit (with F-DO., if activated)
INFORMATION
In case of a short circuit, a high short-circuit current can occur for a short time. De-
pending on the DC 24 V supply voltage used, this can cause a voltage dip that limits
the operation of MOVIDRIVE
®
modular or MOVIDRIVE
®
system and/or individual as-
semblies.
If the voltage supply is not stable enough, it may result in a reset and a restart of the
MOVISAFE
®
CS..A safety card.
•
Make sure the voltage supply does not collapse in case of output short circuits.
24842532/EN – 04/2018
