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ASi Modules with integrated IO-Link Masters

BWU4088Active Distributor ASi-5/IO-Link Master with 1 Port, IP67, M12, 1 IO-Link Port Class B

  • BWU4088
  • BWU4088

Product description

Active Distributor ASi-5/IO-Link Master, IP67, housing depth 35 mm, 1 x IO-Link port class B, sensor supply out of AUX, actuator supply out of AUX, periphery connection via 1 x M12 cable socket, straight, 5 poles, cable length 1 m, flat design, installation in cable duct possible (installation depth >35 mm), LED, connections for 1 x ASi and 1 x AUX profile cables, ASi connection via profile cable and piercing technology, 1 ASi-5 address

Technical data

Type Active distributor ASi-5
ASi-5/ASi-3 ASi-5 compatible
Housing depth: 35 mm
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.

Number of IO-Link Ports 1
IO-Link Port Class B

Port class B (M12): Pin 4 configurable (IO-Link/DI/DO), additional power supply (galvanically isolated) for IO-Link devices at pins 2 and 5. Compatible with 3 pol IO-Link devices (M8).

Configurable conectors: Terminal assignment (C/Q, L+, L-, I) compatible with pin assigment of IO-Link port class A (M12). Connected IO-Link devices with port class B (M12) with a higher current consumption have to be supplied directly via a separate power supply. Compatible with 3 pol IO-Link devices (M8).

Sensor supply (IO-Link supply and input/output supply)

IO-Link and additional inputs/outputs are supplied by ASi or by AUX (auxiliary 24 V power). If supplied by ASi, inputs can neither be connected to earth nor to external potential.

out of AUX
Actuator supply (for IO-Link ports class B)

Connection via M12: For IO-Link ports class B the supply of actuators is provided by an additional (galvanically isolated) power supply by AUX (auxiliary 24 V power) via Pin 2 (P24) and Pin 5 (N24).

Connection via clamps: If connected IO-Link Devices with IO-Link ports class B need a higher current consumption, additionally they can be supplied directly via the power supply.

out of AUX
M8/M12 wiring

Single wiring: 1 input or output per connection.


Y wiring: 2 inputs or outputs per connection.


Mixed wiring: 1 input and 1 output per connection.


Exact pin assignment see data sheet.

IO-Link Port Class B
IO-Link data rate

COM1 = 4.8 kBaud

COM2 = 38.4 kBaud

COM3 = 230.4 kBaud (optional according to Specification V1.0)


An IO-Link device supports only one of the defined data transmission rates.

According to Specification V1.1, the IO-Link master supports all data transmission rates and adapts itself automatically to the data transmission rate supported by the device.

COM1 / COM2 / COM3
IO-Link specification V1.1
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.

yes, depth: 35 mm

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

1 x M12 cable socket, straight, 5 poles
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 modules) however only the one ASi profile cable is counted.

1 m
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.

1 ASi-5 address


    Device Description Files (GSD, EDS, ESI, SDD, etc.)

    The product has earned the following certifications: