8
Electrical installation
Safe digital inputs (F-DI.)
Manual – MOVISAFE
®
CS..A Safety Card
48
8.5.3
Signal monitoring
The signal monitoring detects when the input signal is in an undefined state (unstable
state) for too long. The maximum duration for which an unstable state is permitted is
calculated from the set filter time multiplied by the parameter value of the parameter
Signal monitoring
(Index 8704, Subindex 8). The function can also be deactivated with
the value "0" via the
Signal monitoring
parameter. The safety card responds with an
input error if the signal monitoring is active and the maximum duration has been ex-
ceeded.
8.5.4
Pulsed voltage supply and crossfault monitoring
For information about parameter setting and operating principles, refer to chapter
"Startup".
If crossfault monitoring is used for a safe digital input F-DI, the following assignment
between the sensor supply F-SS and the safe digital input F-DI must be adhered to:
•
F-DI00, F-DI02 via the respective sensor to F-SS0.
•
F-DI01, F-DI03 via the respective sensor to F-SS1.
Crossfault monitoring can be selected separately for each input.
If crossfault monitoring is not active (e.g. for sensors with OSSD output), the sensors
can be supplied either from F-SS0 / F-SS1 or from a24 V supply that has the
same ground reference.
WARNING
Danger due to incorrect setting of the parameter
F-DI. Connection type
when con-
necting dual-channel sensors. There is no redundancy or discrepancy check with
the "Single-channel", setting.
Severe or fatal injuries.
•
When connecting dual-channel sensors, the parameter
F-DI. connection type
must be set to "Dual-channel (non-equivalent/equivalent)".
Only the connection variants shown below are permitted for safe applications! Also
note the assignment of the connection variants of the safe digital inputs to the cat-
egory structures pursuant to EN ISO 13849-1.
8.5.5
Sensors with contact (single-channel)
A single-channel sensor is connected via the sensor supply F-SS0 or F-SS1. The
sensor cycle available there makes it possible for crossfaults in the wiring to be detec-
ted. Note the detailed assignment of F-DI. to the sensor supply F-SS0 or F-SS1 in the
chapter "Terminal assignment".
Settings in the parameterization tool "Assist CS..":
•
Choose the single-channel connection type.
•
Depending on the requirement with respect to safety technology, activate or deac-
tivate the "crossfault monitoring" and pulsed voltage supply of the sensor supply.
24842532/EN – 04/2018
