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Archives Safety I/O Modules

BWU4379ASi Safety I/O Module, IP67, M12, 1SI/1SRO/1I

  • BWU4379
  • BWU4379
  • BWU4379

  • Safe relay output in IP67

  • Applications up to category 4/PLe/SIL3

  • Generation of safety-switched AUX branches

  • Secure data exchange of system parts with different AUX potentials


Product information

  • Logo_ASi-5
  • Logo_cULus
  • Logo_CE

Product description

ASi Safety I/O Module in IP67, housing 51 mm x 60 mm with 4 x M12 sockets, 1 x 2 channels safe input (SIL 3, cat. 4) for floating contacts, 1 release circuit (2 x relay outputs), 1 digital input, input voltage/sensor supply out of AUX, relais control out of ASi, periphery connection via 4 x M12 sockets and via profile cable (switched AUX) and piercing technology, 5 poles and profile, without limitation of connector cable length (loop resistance 150Ω), ASi/AUX connection via profile cable and piercing technology, 2 single addresses + 1 AB address

Technical data

Type IP67, 4 x M12 (51 mm x 60 mm), Safety
Housing 4 x M12
Protection rating

Protected against solid foreign bodies having a diameter of 12.5 mm or larger and against finger contact, not protected against water.


Protected against solid foreign bodies having a diameter of 1.0 mm or larger, protected against access with a wire, no protection against water.


Protection against dust in damaging amounts, complete protection against contact, protection against splashing water in any angle.

Dust-tight, full protection against contact, protection against spray water (jet) from any angle.


Dust-tight, full protection against contact, protection against temporary immersion.

Inputs Safety, SIL 3, Cat. 4 1 x 2 channels
Inputs digital, EDM

An externally connected relay (contactor) can be monitored by connecting the feedback loop to the EDM input.

Outputs Safety, SIL 3, cat. 4 1 release circuit, 2 x relay
Safety signal inputs floating contacts
Input voltage (sensor supply)

inputs are supplied by ASi or by AUX (auxiliary 24 V power). If supplied by ASi, inputs shall not be connected to earth or to external potential.

out of AUX
Length of connector cable unlimited
ASi connection

The connection to ASi as well to AUX (auxiliary 24 V power) is made via yellow resp. black ASi profile cable with piercing technology or via M12 socket (in IP20 via clamps).

Line protection: If the module is supplied via a M12 connection with A or B coding, it may only be used with a current load of max. 4 A per pin in acc. with IEC 61076-2-101 and IEC 61076-2-109. A fused tap is recommended. There is no such limitation for modules supplied via piercing contacts.

ASi profile cable
ASi address

AB address (max. 62 AB addresses/ASi network), 2 AB addresses (max. 31 modules with 2 AB addresses), Single addresses (max. 31 Single addresses/ASi network), ASi-5 address (max. 62 ASi-5 addresses/ASi network), mixed use allowed.
For ASi modules with two ASi nodes the second Asi node is turned off as long as the first Asi node is addressed to address "0".
Upon request, ASi modules are available with specific ASi node profiles.

2 Single addresses + 1 AB address


    The product has earned the following certifications: