8WD42 and 8WD44 signaling columns

The 8WD4 signaling columns are flexible in design and versatile in use.

8WD42 signaling column (width 50 mm) with up to four elements

8WD44 signaling column (width 70 mm) with up to five elements

Two product series are available:

• 8WD42
  • Thermoplast enclosure, 50 mm diameter
  • Degree of protection IP54
  • Up to four elements can be mounted between the connection element and the cover
• 8WD44
  • Thermoplast enclosure, 70 mm diameter
  • Advanced design and significantly improved illumination
  • Fast and flexible connection using spring-loaded terminals
  • Degree of protection IP65
  • Up to five elements can be mounted between the connection element and the cover

Mounting examples for signaling columns

The illustrated examples are from the left:

• 8WD42: Cover (without No.), four light elements (2), connection element (4), tube (8), foot (9)
• 8WD44: Acoustic element with cover (1), two light elements (2), connection element (6), foot with tube (12)
• 8WD44: Cover (without No.), four light elements (2), AS-Interface adapter element (3), connection element (5), bracket for wall mounting (7)
• 8WD44: Cover (without No.), three light elements (2), AS-Interface adapter element (3), connection element (6), foot with tube (12)

Note

The cover is supplied with the connection element.

• Choice of various light and acoustic elements with different functions:
  Continuous light, blinklight, flashlight and rotating light; buzzer and siren
• Light elements with particularly long-lasting LEDs
• Variety of colors: red, yellow, green, white or blue
• Optimized illumination through improved prism technology with the 8WD44
• Acoustic elements can be adjusted in tone and volume
• Extremely resistant to shock and vibrations
• Easy connection and quick lamp change with secure bayonet mechanism
• Communication capability through connection to AS‑Interface
• Communication capability through connection to IO‑Link only for 8WD44

8WD4 signaling columns are used in machines or in automatic processes for monitoring complex procedures or as visual or acoustic warning devices in emergency situations, e. g. for displaying individual assembly stages.

Communication capability

Connection to AS-Interface

The 8WD4 signaling columns can be directly connected to the AS-Interface bus system through an adapter element that can be integrated in the column. Wiring outlay is reduced as the result. The two-wire bus cable is fixed to the terminals in the connection element. Up to four signaling elements can be mounted on it using an adapter element.

A/B technology enables the connection of up to 62 slaves on one AS‑Interface system.

IODD (IO Device Description)

The IO Device Description (IODD) has been defined to provide a full, transparent description of system characteristics as far as the IO‑Link device. The IODD contains information about communication properties, device parameters, identification data, process data, and diagnostics data.

The IODD is available under IO‑Link Device Definition, see https://support.industry.siemens.com/cs/ww/en/view/109761427.

Connection

The signaling elements are wired up using the screw terminals in the connection element, screw terminals on the 8WD42 and screw or spring-loaded terminals on the 8WD44.

Cable version

The connecting cables can be guided either downwards or sideways through the cable gland using an adapter that can be screwed under the foot. This makes wiring easier if there is no access from below.

Connection to AS‑Interface

8WD42

The two-wire bus cable is fixed to the screw terminals in the connection element. The adapter element must be the first module to be mounted on the connection element. A maximum of four signaling elements can then be mounted on it.

The 8WD4228‑0BB adapter element is a standard slave.

8WD44

The two-wire bus cable is fixed to the screw or spring-loaded terminals in the connection element. The adapter element must be the first module to be mounted on the connection element. The signaling elements can then be mounted on it.

The 8WD4428‑0BE adapter element is a standard slave. A maximum of four signaling elements can be mounted on it.

The 8WD4428‑0BD adapter element with A/B technology enables connection of up to 62 slaves on one AS-Interface system. The addressing socket provides user-friendly parameterization of the AS-Interface elements. A maximum of three signaling elements can be mounted on it.

Connection to IO‑Link

8WD4428‑0BF

The 8WD44 signaling columns are connected to the IO-Link system directly via an IO-Link adapter element, which can be integrated into the column and onto which up to five light elements can be plugged.

✓ Available

-- Not available