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Safety I/O Modules

BWU3064ASi Safety I/O Module, IP67, M12, 2SI/4SO/6I

Product description

ASi Safety I/O Module in IP67, with 8 x M12 sockets, 2 x 2 channels safe inputs (SIL 3, cat. 4) for floating contacts or optoelectronic protective devices, 4 release circuits (4 x electronic safe outputs), 2-6 digital inputs (depending on configuration), input voltage/sensor supply out of AUX, output voltage/actuator supply out of AUX, periphery connection via 8 x M12 sockets, 5 poles, without limitation of connector cable length (loop resistance 150Ω), ASi connection via profile cable and piercing technology, ASi addresses depending on configuration

Technical data

Type IP67, 8 x M12, Safety
Housing 8 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 2 x 2 channels
Inputs digital, EDM

An externally connected relay (contactor) can be connected via a feedback loop to the Safety Monitor for monitoring purposes.

2-6, depending on configuration
Outputs Safety, SIL 3, cat. 4 4 release circuits; 4 x electronic safe outputs
Outputs digital -
Safety signal inputs floating contacts, optoelectronic protective devices
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
Output voltage (actuator supply)

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


For relay outputs the relay contacts are initiated from ASi. The load circuit is powered externally as specified in the data sheet.

out of AUX
Length of connector cable unlimited
PCB connection

further connection options are available on request.

screw terminalswiring pins, angled
(pins 180° to PCB)
wiring  pins, straight
(pins 90° to PCB)
solder lugssocketsplug-in spring-type /
screw terminals
   connecting wires

PUR line, oil resistant. Further connection options are available on request.

      M12 socket M12 cable socket, angled  M12 cable socket, straight   M8 cable socket, straight   round cable/connecting wires     profile cable branch          push in terminals
       2 x round cables/connecting wires 2,5 mm²

8 x M12 sockets, 5 poles
M8/M12 wiring

either as a single–wiring, Y–wiring or mixed-wiring.


M12 (5 poles)
M8 (3 poles)
Single wiring


Round cable

Under normal conditions (no bus termination or repeater), the permissible total length of the ASi segment is max. 100 m. The calculation should take into consideration that the length of the connection cable (round cable) for each connected passive distributor must be doubled.

In the case of the active distributors (ASi slaves) however only the one ASi profile cable is counted.

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

depending on configuration

Coating protects components and circuit boards when touched.

   thin coated   thick coated
Flat design, installation in cable duct possible

Modules with a flat housing design and with cables which exit the sides make these ideal for installation in cable ducts, cable channels, cable troughs, cable rails or cable trays. Please note the respective housing depth for your particular installation.

Special function -


    The product has earned the following certifications: