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AS-Interface safety modules: K45F (left), K20F (center) and SC17.5F (right)

S45F SlimLine module, safe AS-i output

Safety modules for AS-Interface (ASIsafe modules) are available for field use in degree of protection IP67 (K20F and K45F compact modules) and for the control cabinet (SC17.5F SlimLine modules) in degree of protection IP20.

A very compact module with an optimum price /performance ratio is thus available for very application.

All modules for the connection of (mechanical) switches and safety sensors with contacts feature crossover monitoring of the connected sensor lead. For versions for the connection of solid-state switches and safety sensors (e.g. light arrays), cross-circuit monitoring must be performed by the sensor.

AS-Interface safety modules

Following modules are available for selection:

K20F compact safety modules for operation in the field

Being only 20В mm wide, the K20F module is particularly well suited for applications where modules need to be arranged in the most confined of spaces. The K20F modules are connected to the AS-Interface with a round cable with M12 cable box instead of with the AS-Interface flat cable. This enables extremely compact installation. The flexibility of the round cable means that it can also be used on moving machine parts without any problems. The K20 modules are also ideal for such applications as their non-encapsulated design makes them particularly light in weight.

K45F compact safety modules for operation in the field

The platform of the K45F modules covers the following variations:

• Connection of ("mechanical") switches/safety sensors with contacts:
  • K45FВ 2F-DI: Two safety-related inputs in operation up to Category 2 according to ENВ ISOВ 13849‑1. If Category 4 is required, a two-channel input is available on the module.
  • K45FВ 2F-DI/2DO: There are also two standard outputs in addition to the safety inputs. Supply from the yellow AS-i cable
  • K45FВ 2F‑DI/2DO U_aux: same as K45FВ 2F‑DI/2DO, but supplied from the black 24 V DC cable
  • K45FВ 4F‑DI: Four safety-related inputs in operation up to Category 2, two for Category 4 Extremely compact double slave (uses two full AS-i addresses).
• Connection of solid-state switches / safety sensors (electrosensitive protective devices, ESPE):
  • K45FВ LS (light sensor): Safety input module for the connection of electronic safety sensors with testing semiconductor outputs (OSSD)
    In particular electrosensitive protective devices such as active, optoelectronic light arrays and light curtains for Type 2 and Type 4 according to IEC 61496.
    Transmitters as well as receivers are supplied with power from the yellow AS-i cable. Matching sensor cables and optionally a separate transmitter supply module are available as accessories.

SC17.5F SlimLine Compact safety modules for operation in control cabinets and local control cabinets with an overall width of only 17.5 mm

With a width of only 17.5В mm, the safe SlimLine Compact modules SC17.5F are ideal for space-saving use in a control cabinet. The modules possess two safety inputs for interfacing signals to ASIsafe networks in the control cabinet. For operation up to Category 2, both inputs can be separately assigned; if CategoryВ 4 is required, a two-channel input is available on the module.

Two module variants are also available, which are equipped with two standard outputs in addition to the two safety inputs. These are supplied with power either via the yellow AS-Interface cable only or via the auxiliary voltage from the black 24 V DC cable. The supply voltage is set via a slide switch on the rear of the device.

When several modules are used, these can be connected with ease via the optional device connector. This simplifies wiring. Then, the yellow AS‑i bus cable and the 24 V DC auxiliary voltage U_aux only need to be connected to one module.

S45F SlimLine safety modules with safe outputs for the safe distributed disconnection of actuators

With the S45F SlimLine safety modules, the shutdown signal, for example from the Modular Safety System, can be used for distributed safety-related disconnection via ASIsafe.

To this end, the module has a two-channel relay output. The module also offers the option of normal output switching using an AS-i standard output bit.

The module has three digital inputs and two digital outputs for the additional connection of sensors and actuators. These can be used, among other things, for the required monitoring of downstream contactors of the feedback circuit.