Please read this User Manual before starting up the controller. Keep the Manual in a
place that is accessible to all users at all times. Please help us improve the Manual.
Your suggestions will be welcome.
All necessary settings and, where required, settings inside the unit are described in this
User Manual, for controller software version 126.01.01.
1.2 Description
Use
Ö
Section 6.2.5
Should any difficulties arise during commissioning, you are asked not to carry out any
unauthorized manipulations on the unit. You could endanger your rights under the unit
warranty! Please contact us in such a case.
When returning modules, assemblies or components to Landis & Staefa, the regulations
of DIN EN 100 015 «Protection of electrostatically sensitive devices» must be observed.
Use only the appropriate
Please note that we cannot accept any liability for damage caused by ESD.
ESD = electrostatic discharge
The RWF40... is used primarily for controlling temperature or pressure in oil- or gas-fired
heating plants. It is a compact 3-position controller without position feedback that acts
on the burner. An external switch can be used to change it over to a 2-position controller
for the control of two-stage burners. The built-in thermostat function switches the burner
on and off. An adjustable response threshold is used to switch to a higher burner output
(high-fire operation).
«Display software version and dimensional unit»
ESD
packaging for transport.
Control
Options
A shift controller controls the temperature or pressure. Minimum and maximum limits for
the setpoint can be set. A self-setting function is available as a standard feature.
The plug-in controller module measures 96 x 48 x 127.5 mm and is especially suited for
mounting in control panels. The controller incorporates two 4-digit 7-segment displays
for the actual value (red) and setpoint (green). A limit comparator is also provided and
its switching behavior can be set on the configuration level.
A selection can be made between eight different limit comparator functions.
An RS-485 interface is used for integration into a data network. Output 5 can be used as
a modulating output for modulating or 2-stage operation.
All connections are made via screw terminals at the rear of the unit.
This symbol is used where there may be a
disregarded or not strictly followed!
This symbol is used where there may be
instructions are disregarded or not strictly followed!
This symbol is used if
sensitive components.
This symbol is used to draw your
This symbol refers to
Footnotes are
parts:
markings
1) The
2) The
and a period
footnote text
Danger
additional information
comments, referring to specific parts of the text.
in the text are arranged as continuous superscript numbers
is placed at the bottom of the page and starts with a number
Caution
and
pre-cautions must be taken
are used in this Manual under the following
danger to personnel
damage to equipment or data
special attention
in other Manuals, chapters or sections.
if the instructions are
if the
in handling electrostatically
to a remark.
They consist of two
▲
Action
Buttons
Button
combinations
✱✱✱✱
1.3.3 Presentation
PGM
EXIT
+
This symbol indicates that
The individual steps are indicated by an asterisk, e.g.:
Press the ▲ button
✱✱✱✱
Buttons are shown in a box. Either symbols or text are possible. If a button has multiple
assignments, the text shown is always the one that corresponds to the function
currently used.
The representation of buttons combined with a plus sign means that first the
EXIT
button must be pressed and held down and then the other button.
If several controllers are mounted side-by-side or above one another in a control panel,
the minimum spacing must be observed, namely 30.5 mm vertically and 10.5 mm
horizontally.
3.4 Mounting in a panel cutout
Place the seal provided onto the controller housing.
✱✱✱✱
3. Installation
The unit must be installed with the seal
the housing!
*
Insert the controller from the front into the panel cutout.
✱✱✱✱
so that no water or oil can penetrate
7865z08/0200
✱✱✱✱
At the rear of the panel, push the fixing elements into the guide slots from the side
or top. The flat faces of the fixing elements must lie against the housing.
✱✱✱✱
Place the fixing elements against the rear of the panel, and tighten them evenly with
a screwdriver.
The front panel can be cleaned with normal washing and rinsing agents or detergents.
not
It is
*
cleaning with high-pressure cleaners!
3.6 Removing the controller module
The controller module can be removed from the housing for servicing.
The rules of DIN EN 100 015 «Protection of electrostatically sensitive devices »
must be adhered to for internal work on the controller!
accepted for damage caused by electrostatic discharge.
3. Installation
resistant to corrosive acids, caustic solutions and abrasive cleaners, or
No liability
will be
7865z09/0200
✱✱✱✱
Press the ribbed surfaces together (at top and bottom) and pull out the controller
module.
The choice of cable, the installation and the electrical connections of the controller
−
must conform to the regulations of VDE 0100 «Regulations for the installation of
power circuits with nominal voltages below AC 1000 V», or appropriate local
regulations
The electrical connections may only be carried out by qualified personnel
−
If contact with live parts is possible while working on the unit, the controller must be
−
disconnected from the power supply at both poles
An internal current-limiting resistor interrupts the supply voltage in the event of a short-
−
circuit. The external fusing should not be rated above 1 A (slow). The output relays
must be fused for a maximum of 2 A to prevent contact welding in the event of a shortcircuit in the load circuit
Section 11.2 «Outputs»
Ö
No other loads may be connected to the supply terminals of the controller
−
The electromagnetic compatibility and interference suppression levels conform to
−
standards and regulations listed under «Technical data»
Chapter 11 «Technical data»
Ö
Input, output and supply cables should be routed separately, not parallel to one
−
another
Arrange sensor and interface cables as twisted and screened cables, and do not run
−
them close to power cables or components. Ground the screening to the controller
one end
Earth the «TE» terminal of the controller to the protective earth. This cable must have
−
a cross-sectional area that is at least as large as that of the supply cables. Earthing
cables must be wired in a star configuration to a common earthing point connected to
the protective earth of the supply. Earthing cables may not be looped from one
controller to another
to the «TE» terminal
at
Incorrect use
The unit is not suitable for installation in areas with an explosion hazard
−
Incorrect settings on the controller (setpoint, data of parameter and configuration
−
levels) can affect the proper functioning of the following process or lead to damage.
Safety devices that are independent of the controller, such as overpressure relief
valves or temperature limiters / monitors should therefore always be provided, and
only be capable of adjustment by qualified personnel. Please observe the appropriate
safety regulations. Since self-setting cannot be expected to handle all possible control
loops, the stability of the actual value that is produced should be checked
The analog inputs of the controller may not exceed a maximum voltage of AC 30 V or