Specifications
AS-Interface slaves
8WD4 signaling columns
General data
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Overview
The 8WD4 signaling columns are flexible in design and versatile
in use.
These are used for controlling complex processes in machines
or automated processes or as visual or acoustic warning
systems in emergency situations, e.g. for displaying individual
stages of production.
8WD44 signaling columns with connection to AS-Interface cables
Two product series are available:
•8WD42
- Thermoplast enclosure, diameter 50 mm
- Degree of protection IP54
•8WD44
- Thermoplast enclosure, diameter 70 mm
- Advanced design and significantly improved illumination
- Fast and flexible when connected through spring-type
terminals (optional)
- Integrated degree of protection IP65
Communication through 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.
Connection
8WD42:
The two-wire bus cable is fixed to the screw terminals in the
connection element. The adapter element must be the first mod-
ule to be mounted on the connection element. A maximum of
4 signaling elements can then be mounted on it.
The adapter element 8WD42 28-0BB is a standard slave.
8WD44:
The two-wire bus cable is fixed to the screw or spring-type
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 adapter element 8WD44 28-0BE is a standard slave.
A maximum of 4 signaling elements can be mounted on it.
The adapter element 8WD44 28-0BD with A/B technology en-
ables the connection of up to 62 slaves on one AS-Interface sys-
tem. The addressing socket provides user-friendly parameter-
ization of the AS-Interface elements. A maximum of 3 signaling
elements can be mounted on it.
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© Siemens AG 2011