Contact-equipped sensors (two-channel)

A two-channel sensor with contacts is connected via the sensor supply F-SS0 and F-SS1. 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.
  • Activate or deactivate crossfault monitoring and pulsed sensor voltage supply, depending on the safety requirements.

The following figure shows the MOVISAFE® CS..A safety option with two-channel sensors with contacts in the connection variants "non-equivalent" and "equivalent":

[1]

Two-channel contact-equipped sensor in "non-equivalent" connection variant

[2]

Two-channel contact-equipped sensor in "equivalent" connection variant

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.

Operation without crossfault monitoring

When using a two-channel, non-equivalent-switching sensor, the MOVISAFE® CS..A safety option can detect a crossfault between the two digital inputs of an input pair.

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-DI.. (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 and a two-channel, equivalent-switching sensor is used, 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..

INFORMATION

Note that in the non-equivalent connection variant, the NC contact is connected to the sensor supply F-SS0.