Planning and Installation Guide
Technical Description
V6
A Checklist
Phase
D
Point to be Checked
Further Details
Remark Hints
Drawing
1. Planning
1.1 Sensor Related
1.1.1
Get an overview of location
and type of sensors
Choose WPS sensorhead type to be used
1.1.2
Distance to neighbouring
WPS Sensors and to metal
objects
See "Planning and
Installation
Guidelines"
Chapter 2.9
Should be >2.5cm, otherwise wireless communication
and power supply will be affected.
1.1.3
Shielding: Distance of sensor
position relative to large
metal parts or short circuit
loops in the application
See "Planning and
Installation
Guidelines"
Chapter 1.7
!
WPS will not work if both magnetic field directions
setup by the primary loops are shielded by metall
objects or short circuit loops :
- 1D Shielding (in one direction of the magnetic field) is
tolerable
- 2D shielding is not tolerable:
-> If short circuit loops are shielded: Interrupt at least
one loop with an isolating section
- >if large metal plates are shielding: Check if sensor
can be moved to another location
1.2 Power Supply Related
1.2.1
Plan primary loops: Size,
distance, number
See "Planning and
Installation
Guidelines"
Chapter 1.2
- Use at least two pairs of primary loops to create a
rotating field.
- Distance of parallel loops: ~ 2/3 of smallest width of a
loop.
- The two primary loop pairs have to be orthogonal to
1.2.2
Check details of planned
application:
Distance of metal objects
near loops (large short circuit
loops, metal parts)
See "Planning and
Installation
Guidelines"
Chapter 1.4
- Interrupt large short circuit loops, also if outside of
the primary loops but close to the loops
- Avoid large metal obstacles parallel to the two coil
planes (try to keep a distance of 1/6 of the loop size to
parallel large metal objects).
- Keep the loop coils away from metal objects by at
min. 3 cm, recommended are >> 10 cm (especially
from magnetic steel objects; if the steel is magnetic can
be checked with a permanent magnet).
1.2.3
Check details of the
applications surrounding
same as above:
metal floor, walls, poles belonging to other structures
(machines, building) close to the coils
1.2.4
Chose amount and
placement of power supplies
WPU100
Two loops can be connected per supply.
Mounting: Observe a distance for free airflow of 20 cm
above the supplies.
Placing the supplies close to the coils shortens the loop
wires needed, which reduces losses.
1.2.5
Select the mechanical
support for primary loops
Plastic tubes/conduits are recommended
!
Metal tubes/conduits or metal cable ducts are not
allowed for the loop itself.
1.2.6
Calculate length and amount
of primary loop cables
needed
The primary loop wire is available in lengths from 10-
28m in steps of 1m (readily configured with ring cable
lugs)
1.2.7
Plan primary loop routing
See "Planning and
Installation
Guidelines"
Chapter 1.6
Do not route other electrical wiring in loop ducts or
directly in parallel (>15cm f. fieldbus wires; cross
vertical). Plan for twisted loop wire, from the loop to the
power supplies WPU
1.2.8
Calculate current to be used See "Planning and
Installation
Guidelines"
Chapter 4.2
See the table in chapter 4.2
"Primary loop sizes and current values"
Document chosen current value!
1.2.9
Plan safety distance for pace
maker carriers in your
application (marking and
sign)
See "Planning and
Installation
Guidelines"
Chapter 1.3
See the table in chapter 1.3
Mark pacemaker warning line on floor (e.g. in yellow-
black colour), put a danger sign in high of the line and
document place and distance.
This list contains all important steps for the planning, installation and commissioning of a system with wireless proximity
switches WPS. It additionally contains hints and references to the relevant chapters in the handbook.
3
2
Wireless Proximity Switches / issued: 09.2004
Checklist A 1 / 3