Active sensors (two-channel)

When connecting a two-channel sensor with additional voltage supply, the voltage is supplied via an external DC 24 V voltage supply. The voltage supplies for the sensor outputs are connected to the sensor supply F-SS0 and F-SS1. The safe outputs of the sensor are connected with two channels to the respective safe digital inputs (F-DI..) at terminal X60. Note the detailed assignment of the safe digital inputs (F-DI..) to the sensor supply F-SS0 and F-SS1 in chapter Terminal assignment.

Settings in the "Assist CS.." parameterization tool:

  • Choose the two-channel connection type (equivalent/non-equivalent).
  • Activate or deactivate the pulsed sensor voltage supply, depending on the safety requirements.
  • Parameterize the permitted discrepancy time between the two input signals of the sensor you are using.

The following figure shows the MOVISAFE® CS..A safety option with an active sensor (two-channel):

[1]

Active two-channel sensor

[2]

Supply of output 1 (Out1)

[3]

Supply of output 2 (Out2)

[4]

Safe digital output 1

[5]

Safe digital output 2

[6]

External DC 24 V voltage supply

Operation with activated crossfault monitoring

The following errors are detected:

  • Crossfault between every digital input line F-DI.. and a 24 V supply voltage.
  • Crossfault between a digital input line F-DIx and another digital input line F-DIy, which is assigned to another sensor supply, if at least the associated switch contact of the other digital input F-DIy is closed.
  • Crossfault between a digital input line F-DI.. and a sensor supply line not assigned to the input F-DI..
  • Crossfault between a sensor supply line F-SS.. and a 24 V supply voltage if the digital input F-DI.. is assigned to the sensor supply and the switch contact belonging to F-DI.. is closed.
  • Crossfault between the sensor supply lines F-SS.. themselves if the switch contact belonging to the digital input F-DI.. is closed.

WARNING

The MOVISAFE® CS..A safety option cannot detect a short circuit between an F-SS.. sensor supply and an associated safe digital input F-.. (sensor jumpered).
Severe or fatal injuries.
  • Make sure that a short circuit between the sensor supply F-SS.. and an associated safe digital input F-DI.. is not possible.

WARNING

If crossfault monitoring is deactivated, the MOVISAFE® CS..A safety option cannot detect crossfaults in the cabling.
Severe or fatal injuries.
  • Make sure that crossfaults are not possible at the safe digital inputs F-DI.., or that they can be detected by the sensor.