FISCHER DE45 series User manual

d e v e l o p i n g s o l u t i o n s
*09005067* BA_EN_DE45 Rev.B 09/16
*09005067*
Table of contents
1Safety Instructions
2Intended Applications
3Product Description and Function
4Installation and assembly
5Commissioning
6Maintenance
7Transport
8Service
9Accessories
10 Disposal
11 Specifications
12 Dimensions
13 Ordering code
14 EC Declaration of Conformity
1 Safety Instructions
1.1 General information
This operating manual contains detailed
information about the installation, opera-
tion and maintenance of the instrument.
This information must be observed and
read by the installer, operator and other skilled per-
sonnel prior to any installation and commissioning
of the instrument.
This operating manual forms part of the product and
must be kept in the immediate vicinity of the instru-
ment for easy access by the responsible personnel
at any time.
The following chapters, especially the instructions
on installation, commissioning and maintenance
contain important safety information, the non-
compliance of which may result in hazards to per-
sons, animals, environment and objects.
1.2 Personnel qualification
Only personnel trained in the installation, commis-
sioning and operation of this product may install
and operate the same.
Skilled personnel are persons who are able to judge
delegated work and possible hazards based on
their technical education, proficiency and experi-
ences, particularly due to their knowledge about the
applicable norms.
1.3 Risks of non-compliance with safety
instructions
Non-compliance with these safety instructions, in-
appropriate use of this product, and/or operation of
this product outside the limits specified for any of its
technical parameters, may result in harm to
persons, the environment or the system in which it
is installed.
The producer is not liable for any claims for
damages in such circumstances.
1.4 Safety instructions for operators
Safety instructions for the proper use of this product
must be followed. This information must be availa-
ble at all times to personnel responsible for installa-
tion, operation, maintenance and inspection of this
product.
Adequate steps must be taken to prevent the occur-
rence of hazardous conditions that can be caused
by electric energy and the convertible energy of the
process media and/or improper connection of the
instrument. Detailed information can be found in the
relevant national and/or international rules and reg-
ulations.
In Germany DIN EN, UVV apply, for industry-
specific applications regulations of DVGW, Ex, GL,
as well as the rules of the local author-
ities (EVUs in Germany).
Instruction Manual
DE45
Digital Differential Pressure Switch / Transmitter

P a g e | 2
1.5 Forbidden modifications
Modification or other technical alteration of the de-
vice by the customer is not permissible. This also
applies for the use of spare parts. Any eventual
modifications/ variations will be carried out solely by
Fischer Mess- und Regeltechnik GmbH.
1.6 Impermissible operational modes
The operational dependability of the device is guar-
anteed only if it is used as intended. The device
version must be adapted to the medium used in the
system. The limiting values stated in the technical
data must not be exceeded.
1.7 Safety Considerations during Installa-
tion and Maintenance
The safety instructions stated in this manual, exist-
ing national regulations on accident prevention and
the internal rules and procedures on working, oper-
ation and safety of the operator are to be observed.
It is the responsibility of the operator to ensure that
only authorised and skilled technical personnel car-
ry out any required maintenance, inspection and in-
stallation works.
1.8 Explanation of symbols
WARNING!
...indicates a possible hazardous situ-
ation the non-observance of which
might result in hazards to humans, an-
imals, environment and objects.
INFORMATION!
…points out important information for
efficient and trouble-free operation.
TIP!
…points out useful recommendations
that are not necessarily required for
operation that might however be of
use in certain situations.
2 Intended Applications
Display and switching device for Differential pres-
sure of gaseous media. The instrument is to be ex-
clusively used for the applications agreed between
the manufacturer and user.
3 Product Description and Function
3.1 Functional diagram
3.2 Design and mode of operation
The device is based on a piezo-resistive sensor el-
ement that is suitable for measuring overpressure,
underpressure and differential pressure. The pres-
sures to be compared directly act on a silicon dia-
phragm equipped with piezo-resistive resistors. In
case of equal pressure, the measuring diaphragm is
in its idle state. In case of pressure difference, the
force acting on the measuring membrane causes it
to be moved towards the side of the lower pressure.
This movement of the diaphragm induces a change
of resistance, which is evaluated by the device's
electronics and transformed into signals on the dis-
play, switch contacts and an output signal. The op-
tional output signal can be dampened, spread, in-
verted and can also be transformed in a non-linear
manner via a table function.
4 Installation and assembly
The unit is designed for mounting on flat assembly
plates. For screw connection to the assembly plate,
the device features four assembly bores on its
back, which can be used for Ø 3.5 mm tapping
screws.
Optionally, the device can be delivered with a wall-
mounting plate.
At the factory, the device is calibrated for vertical
installation, but the installation position is arbitrary.
For any installation positions that are not vertical,
the zero-point signal can be corrected via the in-
stalled zero-point adjuster.
The enclosure protection type IP 65 is only guaran-
teed, if a suitable power supply cable is used.
If the device is intended for outdoor use, we rec-
ommend permanently protecting the membrane
keypad against UV radiation and using a suitable
enclosure or at least the erection of a sufficiently
dimensioned canopy as a protection measure
against constant rain or snow.

P a g e | 3
4.1 Process connection
•By authorized and qualified specialized person-
nel only.
•The pipes need to be depressurized when the
instrument is being connected.
•Appropriate steps must be taken to protect the
device from pressure surges.
•Check the suitability of the device for the media
to be measured.
•Maximum pressures shall be observed.
•Do not blow into the pressure connections!
The pressure connections are marked with (+) and
(-) symbols on the device. For differential pressure
measurements, the higher pressure is connected to
the (+) side and the lower pressure to the (-) side of
the device.
The pressure sensing lines must be installed on a
gradient so that no air pockets e.g. for liquid meas-
urements or water pockets e.g. for gas measure-
ments can be created. If the required incline is not
reached, water and/or air filters need to be installed
at suitable points.
The pressure sensing lines need to be kept as short
as possible and installed without sharp bends to
avoid interfering delay times.
If the pressure sensing lines are already
pressurized at the time of commission-
ing, zero-point control and adjustment
cannot be performed. In such cases, the
device should be only connected to the mains with-
out the pressure sensing lines.
4.2 Electrical connection
•By authorized and qualified specialized person-
nel only.
•The instrument must be connected electrically
in accordance with the relevant national guide-
lines and the guidelines of the local provider.
•Disconnect the system from the mains, before
electrically connecting the device.
•Install the consumer-adapted fuses.
Plug 1: Power Supply and Output signal
Plug 2: Switching output
The nominal supply voltage and the admissible
range can be found in the technical data.
The admissible load / resistance for the signal out-
put are stated in the technical data.
The connection "Signal ground“(-Sig) is connected
internally to the supply ground. It only serves as the
ground connection for the output signal. This means
that the output signal is free of interference levels
on the power supply lines.
5 Commissioning
All electrical supply, operating and measuring lines,
and the pressure connections must have been cor-
rectly installed before commissioning. All supply
lines are arranged so that there are no mechanical
forces acting on the device.
The tightness of the pressure connection lines must
be checked before initialization.
5.1 Display
•The 3½ digit LED display normally indicates the
current differential pressure.
•The backlit symbols to the right of the 3½ digit
LED display indicate the unit of pressure meas-
urement.
The units shown in the illustrations of this doc-
ument can be different from those of the actual
instrument.
•Above the display, two LEDs symbolise
the condition of the switching outputs. As soon
as the switch is closed, the applicable LED
lights up.
Switching Output1
Switching Output 2
3½ digits LED Display
Control keys
Measuring unit
BN
WH
BU
BK
SP1no
SP2com
SP2no
SP1com
BN
WH
BU
BK
Internal link
Signal -Sig
Supply -Ub
Signal +Sig
n.c.
Supply +Ub

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5.2 Control keys
The control keys have the following functions:
ÿ
Menu down
Decrease value
û
Enter key
þ
Menu up
Increase value
5.3 Configuration
For commissioning there is a multitude of setting
options for optimum adaptation of the device to the
measuring point and task at hand. This section co-
vers these options step by step.
Depending on the device design available,
1
some
menu points are not available. For example, all
characteristic curve functions are masked from the
menu if the device does not have a signal output.
The device can be completely set con-
veniently on the PC using a PC adaptor.
There all parameters are immediately
visible and accessible. In addition, the
complete configuration can be loaded, saved and
documented as a control print-out. Further guide-
lines on this program can be found in the documen-
tation for this program (see accessories).
5.3.1 General
Put the device electrically into operation and ensure
that the device is initially depressurised (if neces-
sary, disconnect the pressure connection lines).
In order to set a parameter, proceed as follows:
•Press the Enter ûkey in order to switch into the
menu. ESc will appear on the display.
•Use the ÿþarrow keys in order to select a pa-
rameter from the list.
•Press the Enter ûkey in order to call up the pa-
rameters.
•Use the ÿþarrow keys to set the required val-
ue.
•Use the Enter ûkey to save the value.
After you have set all the parameters, leave the
menu as follows:
2
•Using the ÿþarrow keys, set the ESc parame-
ter. You can find this both at the start and at the
end of the parameter list.
•Use the Enter ûkey to leave the menu.
1
With reference to the transmitter signal, voltage output, current
output etc.
2
Only when you leave the menu via the esc parameter are the
set parameters valid.
5.3.2 Selection of pressure unit
First select the required pressure measuring unit.
The unit currently valid is highlighted on the right
next to the figure display. For setting, use the mid-
dle ûkey and then look using the right þkey for
the EIN parameter. Press ûagain and then change
the value shown using þor ÿ.
1 = above
2 = middle
3 = down
After selection, save the value with ûand ein will
appear again in the display.
To complete, leave the settings mode. Press ÿuntil
ESc and then û. Now the pressure currently meas-
ured is represented. On the right of this, the correct
pressure unit should be highlighted.
The display circumference is limited to
±1999. For this reason not all specified
pressure units may, in individual cases,
be selectable.
5.3.3 Zero point control and adjustment
Ensure that the device is depressurised (if neces-
sary, disconnect the pressure connection lines).
If the device does not indicate precisely zero the OF1
parameter enables you to adjust the offset exactly
to zero. To do this, you must tune the value of OF1 to
zero.
After zero-point adjustment, the pressure connec-
tion lines can be reconnected.
5.3.4 Damping and zero-point stabilizing
If there are unsteady pressure readings at this point
of time or during operation, you can use parameters
DAM and NP to stabilise the reading (and the output
signal).
The DAM parameter acts like a capillary throttle.
However, it only has an effect on the display, the
output signal and the switch points but not on the
measuring cell itself. You can set the response time
to pressure jumps using this parameter. The values
range comprehends 0.0 to 100.0 seconds.
With maximum damping, it will take more than 2
minutes for the reading also to reach zero after
a pressure jump from nominal pressure (100 %)
to zero.
In many cases, unsteady readings are not a prob-
lem during normal operating mode, but this is not
true for the idle state, i.e. if zero (differential) pres-
sure is expected.
In such situations, parameter NP can be applied. Its
value defines a measuring value range of around
zero. The measuring value is set to zero within this
range.

P a g e | 5
Example:
For NP, a value of 0.08 mbar
3
is entered. In this
case all pressures which lie within a range of -
0.08 mbar to +0.08 mbar become zero. Only if
the pressure exceeds these limits, will the read-
ing no longer indicate zero. The pressure value
and the reading do not however accord one
hundred percent with each other. Only after a
doubled value, i.e. from 0.16 mbar, will the
measuring pressure and the reading match
again.
5.3.5 Setting the output signal
The transmitter output signal primarily depends on
the measured pressure. However, you have the op-
tion to adjust the output signal to a large extent to
suit your requirements.
However, the basic measuring range (indicated
on the type label) and the type of output signal
(voltage or current) are not variable.
The parameters MA (Start of measuring range) and
mE (End of measuring range) define the limits to
which the output signal can change at all. Both val-
ues are adjustable across the entire basic measur-
ing range. The set values always refer to pressures
in the relevant valid pressure unit and are converted
when the unit is changed.
The allocated signal values for MA and ME cannot be
changed (see type label, e.g. 0...10 V or 4...20 mA).
If MA ME, we speak of a rising characteristic curve.
The output signal increases as the pressure rises.
If MA > ME, we speak of a falling characteristic curve
and the output signal decreases as the pressure
rises.
The difference between values MA and ME must be at
least 25 % of the basic measuring range. The soft-
ware will not allow larger spreads. You will not be
able to exit the menu if you have entered incorrect
range values.
Example:
With a basic measuring range of 400 Pa, the
following must apply: ME –MA 100 Pa.
5.3.6 Output signal limits (Namur)
The three parameters oG1, oG2 and oEr determine
independent of the pressure, the limit values for
output currents or voltages which must not be un-
derrun or exceeded.
These limit values are superordinate to the
range determined through MA and ME. They
serve mainly to suppress error messages in
downstream systems through short-term meas-
uring range exceedances.
3
0.08 mbar ≙8 Pa
With the oG1 parameter, the limit value for the mini-
mum output signal is determined. The output signal
cannot underrun this value. Generally this parame-
ter is only expedient for devices with an output sig-
nal of 4...20 mA, because on these devices a value
below 3.8 mA is often evaluated as an error signal.
With the OG2 parameter, the limit value for the max-
imum output signal is determined. The output signal
cannot exceed this value. This parameter can be
used for all outputs (voltage and current) in order to
limit the maximum value to e.g. 10.2 V.
With the oer parameter, the value for the error sig-
nal is determined. The value specified with oEr is
emitted as an output signal if the device detects an
internal error and work no longer correctly. Howev-
er, not all possible errors and defects can be de-
tected by the device.
If you set oG1 = OG2 = 0, the output signal is no long-
er checked for limits.
If you set oG1 to the maximum value
(11 V or 21 mA), you can change using
OG2 the output signal independent of
pressure from zero to the maximum
value. It is not necessary to leave the menu item;
the output is then carried out immediately. You then
operate the device as a signal transmitter and can
then easily check the other signal processing.
5.3.7 Characteristic curve function F
For certain applications, a pressure measurement is
only an indirect measurement for the actual varia-
ble. Flow measurements across an aperture or fill-
ing level determination through hydrostatic pressure
measurement are two typical examples of this. In
these cases it may be necessary to change the
output signal of the transmitter through a non-linear
characteristic curve so that the subsequent evalua-
tion receives a signal linearly proportional to the ac-
tual measured value (e.g. volume in m³ or volume
flow in cm³/s etc.)
The Fparameter allows you to select between the
following variants:
F
Characteristic curve
0
Linear characteristic curve (standard)
1
Root-extracted characteristic curve
2
Horizontal cylindrical tank
3...30
Support point table with 3 to 30 value pairs
Whenever you change the value of F, the program
will create a new table. All previous table values are
rejected and replaced with new linear entries.
The tables for types F = 0 to F = 2 are not visible.
Here internal values are used for table calculation.
These values cannot be modified.

P a g e | 6
For F= 3...30, you only have influence on the 1...28
intermediate values (see section 0) you only have
access to the start and end value via the MA and ME
parameters.
If the parameters MA and ME are
changed, the table will be deleted and
F= 0 is set.
At the start of measuring range (MA), 0% is emitted
by the output signal (e.g. 0 mA).
At the end of measuring range (ME), 100% is emitted
by the output signal (e.g. 20 mA).
5.3.8 Menu jump LIN
If the value of Fis larger than or the same as 3, a
submenu named LIn appears. Here you can access
all table values except for the start of the table (MA)
and the end (ME).
This submenu has its own entry and exit point,
which is represented with End. The table is not
saved until you switch back to this point in the main
menu, meaning that you switch back using the û
key to the LIN parameter.
If the table is not structured correctly, an error mes-
sage Err will appear at this point, and you will not
be able to exit the submenu.
The table consists of 3...30 value pairs. On a device
with a power output, the first value pair is {I01|P01}
4
.
The initial value I01 determines the level of the out-
put signal. The second value P01 determines at
which pressure the output signal should be emitted.
Then come the value pairs {I02|P02} ... {I30|P30}.
The entry of or changes to the table values via the
membrane keyboard is extremely strenuous and
prone to errors. It is only intended as an emergency
solution in case access to the PC adaptor is not
possible.
The table is correct if the following applies for all
signal values: the value is larger than the previous
value. For the pressure values, therefore, either the
larger (rising characteristic curve) or the lower (fall-
ing characteristic curve) apply accordingly. A transi-
tion from a rising to a falling characteristic curve or
vice versa is not permitted.
5.3.9 Switch Points
The two switching outputs are configured
through four parameters each.
The function of the switching output is deter-
mined through the parameters R1A, R1E, R1D and R1F.
The function of the switching output is deter-
mined through the parameters R2A, R2E, R2D and R2F.
4
With a voltage output you’ve got {u01|P01} ... {u30|P30}.
The operating principle of this parameter is shown
on example of switching output .
R1A determines the switch-off point, and R1E deter-
mines the switch-on point for switching output .
The values are set in the valid measuring unit
(shown on the right).
Together, both the R1A and R1E parameters deter-
mine the switching function of switching output :
If R1A is smaller than R1E, the output switches on if
the measuring value exceeds R1E. It does not switch
off until the measuring value underruns R1A (hyste-
resis function).
If R1A and R1E are equal, the output switches on if the
measuring value exceeds R1E and off if the measur-
ing value underruns R1A.
If R1A is larger than R1E, the output switches on if R1E
< measuring value < R1A applies (window function).
Both parameters can be set independently across
the entire measuring range.
If the measuring unit is switched, the switch points
are recalculated accordingly. Here rounding errors
may cause deviations in the last point.
R1D allows the reaction of the switching output to
be delayed by 0.0 to 100.0 s. This value applies
equally for switch-on and switch-off.
R1F reverses the function of the switching output. If
the value = 1, the switching output functions as an
NO contact, if the value = 2, the switching output
functions as an NC contact.
5.3.10 Password
The last menu item -P- serves for the input of a
password. A value of 001 to 999 can be selected as
a password. The value 000 renders the password
function invalid.
If a password was assigned, a text PAS is shown af-
ter ESc and û, and you must enter the right value by
using ûand þ ÿ. Only by doing so will you be able
to access all other menu items. In the event of an
error, the reading goes back to the start of the
menu ESc.
If the password is forgotten, it can only
be reset by the manufacturer or over-
written via the PC adapter.
5.3.11 Display Options
The D0 parameter permits the reading to be stead-
ied if the measuring value fluctuates severely. This
filter function is similar to the dAM function, but has
an effect only on the display and not on the output
signal. With D0 = -1, only the switch point LEDs can
be controlled. With D0 = -2, these are switched off.

P a g e | 7
5.3.12 Reset to Default values
The res function serves to reset all settings to de-
fault. Default values can only be defined via PC in-
terface.
5.3.13 Free Unit
If the device is designed for a "free" third unit
(membrane symbol: ), the display can be scaled
at will using the parameters MAF, MEF and dPF.
The measuring range defined through the parame-
ters MA and ME is converted into MAF and MEF. Here
the table function (F) is also taken into account. The
value of dPF determines the position of a decimal
point.
5.4 Parameter overview
After switching on the device, it will briefly indicate
the software version number and then enters the
normal operating mode. By using the middle ûkey
on the membrane keypad you can access the pa-
rameter menu. The reading now shows the text ESc.
By using the right þkey, you can choose the pa-
rameters from the following list one by one:
Note:
Depending on the device design, indi-
vidual parameters may not be available
if the device does not possess this fea-
ture
PAS
Enter password
(only comes up if password is active),
values range 000..999
000 = deactivated
DAM
Damping
(Jump response time T90),
values range 0.0...100.0s
d0
Display damping
Value range -2...0...100.
-2 = Display off, LED switching pt. off
-1 = Display off, LED switching pt. on
0 = Display on, LED switching pt. on
1...100 Display damping
R1A
Switch-off point
From switching output 
R1E
Switch-on point
From switching output 
R1D
Switching delay
From switching output 
Values range 0.0 to 100.0s.
This value applies equally for switch-on
and switch-off.
R1F
Switching function
From switching output 
Values range 1,2
1 = Switching output as NO contact,
2 = Switching output as NC contact
R2A
Switch-off point
From switching output 
R2E
Switch-on point
From switching output 
R2D
Switching delay
From switching output 
Values range 0.0 to 100.0s.
This value applies equally for switching
on or off.
R2F
Switching function
From switching output 
Values range 1,2
1 = Switching output as NO contact,
2 = Switching output as NC contact
eiN
Measuring range unit
Values range 1,2,3
The selection is highlighted on the
right-hand side next to the display. Not
all basic measuring ranges allow any
switching. The respective unit size can
only then be selected if the basic
measuring range of the device can be
represented meaningfully
MA
Start of measuring range
The measuring value is set in a way
that results in a minimum output signal.
(e.g.: 0V, 0mA or 4mA).
ME
End of measuring range
The measuring value is set in a way
that results in a maximum output sig-
nal. (e.g.: 10 V or 20 mA).
nP
Zero point stabilisation
Value range 0...⅓FS
Defines a measuring value range of
around zero
Dpf
Free Unit
Position of decimal place
maf
Free Unit
Measuring range start point
(displayed value)
mef
Free Unit
Measuring range end point
(displayed value)
Of1
Offset correction measuring input 1
Value range -⅓FS...0... +⅓ FS

P a g e | 8
F
Characteristic curve function
Value range 0...30
0 = linear,
1 = root-extracted,
2 = horizontal cylindrical tank
3..30 = table
lIn
Menu entry
Submenu table processing
If F < 3, this menu item is masked.
oG1
Limit value
Minimum output signal
OG2
Limit value
Maximum output signal
OEr
Error signal
(Output signal in case of error)
res
Reset
All parameters to default values (speci-
fication of default values via PC)
6 Maintenance
The device does not require maintenance. In order
to ensure reliable operation and a long service life
of the device we recommend regular checking of
the device as follows:
•Check the function in connection with slave
components.
•Check the tightness of the pressure connection
lines.
•Check the electrical connections.
The exact test cycles have to be adapted to the op-
erating and environmental conditions. The operat-
ing manuals of all other devices are also to be ob-
served if there is an interaction of different device
components.
7 Transport
The product must be protected against severe im-
pacts. Therefore transport is to be effected only in
the packaging intended for transport.
8 Service
All defective or faulty devices are to be sent directly
to our repair department. We would like to ask you
to coordinate all device returns with our sales de-
partment.
Remaining medium in and on dismantled
measuring instruments may cause dan-
ger to persons, environment and equip-
ment. Take reasonable precautions!
Clean the instrument thoroughly if necessary.
9 Accessories
•M12 connectors with pre-wired cable lengths on
request.
•PC serial interface adaptor with software model
EU03.F300.
10 Disposal
Protect your environment....
Kindly help us protecting the environ-
ment and dispose of or recycle the
used products in accordance with the
relevant regulations.

P a g e | 9
11 Specifications
Positive range (0…)
Plus over minus range (±)
Measuring
range
mbar
4
6
10
16
25
40
60
100
160
250
2,5
4
6
10
16
25
40
60
100
Pa
400
600
1000
1600
250
400
600
100
1600
kPa
0,4
0,6
1,0
1,6
2,5
4,0
6,0
10,0
16,0
25,0
0,25
0,4
0,6
1,0
1,6
2,5
4,0
6,0
10,0
Static opera-
tion pressure
max
mbar
50
100
250
500
1500
50
100
250
500
Burst pressure
mbar
150
300
750
1500
3000
150
300
750
1500
Straight line
deviation°)
max.
%FS
1,0
1,0
typ.
%FS
0,5
0,5
TC Span°°)
max.
%FS/10K
1,0
0,3
0,4
1,0
0,5
0,3
typ.
%FS/10K
0,3
0,3
TC Offset°°)
max.
%FS/10K
1,0
0,4
1,0
0,5
0,4
typ.
%FS/10K
0,2
0,2
°) : Straight line deviation = nonlinearity + hysteresis; at 25 °C; pressure within specified range (characteristic linear, not spreaded)
°°) : Pressure within specified range (not spreaded); compensated temperature range 0 to 60 °C
General
Operating temperature (ambient)
-10 ... 70°C
Operating temperature (medium)
-10 ... 70°C
Storage temperature
-20 ... 70°C
Protection class
IP65 according to DIN EN 60529
Electrical
Nominal Voltage
24V AC/DC
Perm. Operating Voltage Ub
12 ... 32V AC/DC
Connection type
Three Wire Connection
Output signal
0 ... 20mA, 4 ... 20mA AC/DC
0 ... 10V DC
Perm. Load
RL ≤ (Ub- 4 V) / 0,02A (if Ub≤ 26V)
RL ≤ 1100 Ω (if Ub> 26V)
RL ≥ 2 KΩ (if Ub≥ 15V),
RL ≥ 10 KΩ (if Ub= 12 …15V)
Power consumption
Approx. 2W / VA
Display Unit
3½ digit LED
Switching Contacts
EMR
2 sets of voltage free relay contacts; programmable n.o. or n.c.
Umax = 32V AC/DC, Imax = 2 A, Pmax = 64 W/VA
SSR
2 sets of voltage free semiconductor switch (MOSFET); programmable SPST-n.o. or n.c.
U = 3 … 32V AC/DC, Imax = 0,25A, Pmax = 8 W/VA, RON ≤ 4 Ω
Connections
Pressure connections
threaded hose coupling (aluminum) for 6/4 mm or 8/6 mm hose
Electrical connections
2 x round shell male connector sockets M12
Connector 1 (5-pin): power supply and analog signal output
Connector 2 (4-pin): relay contacts (alt. solid-state switch output)
Material
Housing
Polyamide PA 6.6
Media contact
Silizium, PVC, aluminum, brass
Mounting
Rear mounting holes for panel mounting
Panel mounting kit
Wall mountable using adaptor plate
Outdoor application
If the instrument is intended for outdoor application, we highly recommend using an adequate
protective housing (or at least a big enough shelter) as protection against UV-radiation on the
membrane keyboard and against exposure of the instrument to rain or snow.

P a g e | 10
11.1 Programming
Via membrane key-switches, programming mode can be password protected.
Settings
Input filtering
0 ... 100.0 secs (10 / 90% step response time) for signal output, display separated
Relay/switch 1 / 2
Activation point, de-activation point, response time delay (0.0 ... 100.0 secs), logic (n.o. /n.c.)
Measurement unit selection
mbar / Pa / „free unit“ start value, end value and decimal place for „free unit“
Zero suppression
0 ... 1/3 of the basic measuring range (1)
Output signal start/end value
Can be set at any point of the basic measuring range (2)
Zero pressure calibration
± 1/3 of the basic measuring range (3)
Output characteristic
Linear, square rooted, horizontal cylindr. tank, table (3...30 entries)
Password
001 ... 999 (000 = password protection disabled)
Notes:
(1): Measured values (about zero) are set to zero (used for zero drift suppression); see rating plate for basic measuring range
(2): Maximum effective turn-down ratio = 4:1. Only the output signal is affected.
Transfer function is inverted if start value > end value.
(3): Zero calibration setting may change with mounting orientation.
12 Dimensions
Panel mounting
Electrical connection
Connector 1
Connector 2
Wall mounting adaptor plate
(optional)
Rear view
Without wall mounting adaptor plate
Threaded hose clamp con-
nectors for 6 or 8 mm hose
Connector 1
Connector 2
Holes for sheet metal screws
Ø 3.5 mm
M12 Connector
(All units in mm unless stated otherwise)
Wall thickness
Internal link
Relay/switch 1
Relay/switch 2
(+) signal
(+) supply
(-) signal
(-) supply
BK
BN
WH
BU
BK
BN
BU
WH
Guide key

P a g e | 11
13 Ordering code
Digital Differential Pressure Switch / Transmitter,
with 3 ½-digt LED display
Type DE45
0
0
K
M
Measuring range
0 …4 mbar ...................................................................................... >
5
2
0 …6 mbar ...................................................................................... >
5
3
0 …10 mbar ...................................................................................... >
5
4
0 …16 mbar ...................................................................................... >
5
5
0 …25 mbar ...................................................................................... >
5
6
0 …40 mbar ...................................................................................... >
5
7
0 …60 mbar ...................................................................................... >
5
8
0 …100 mbar ...................................................................................... >
5
9
0 …160 mbar ...................................................................................... >
6
0
0 …250 mbar ...................................................................................... >
8
2
-2,5 …+2,5 mbar ...................................................................................... >
A
6
-4 …+4 mbar ...................................................................................... >
A
7
-6 …+6 mbar ...................................................................................... >
A
8
-10 …+10 mbar ...................................................................................... >
A
9
-16 …+16 mbar ...................................................................................... >
B
1
-25 …+25 mbar ...................................................................................... >
B
2
-40 …+40 mbar ...................................................................................... >
C
5
-60 …+60 mbar ...................................................................................... >
B
3
-100 …+100 mbar ...................................................................................... >
B
4
0 …400 Pa.......................................................................................... >
D
7
0 …500 Pa.......................................................................................... >
J
7
0 …600 Pa.......................................................................................... >
D
8
0 …1000 Pa.......................................................................................... >
D
9
0 …1600 Pa.......................................................................................... >
E
1
-250 …+250 Pa.......................................................................................... >
L
6
0 …1 kPa ........................................................................................ >
N
1
0 …1,6 kPa ........................................................................................ >
N
2
0 …2,5 kPa ........................................................................................ >
N
3
0 …4 kPa ........................................................................................ >
N
4
0 …6 kPa ........................................................................................ >
N
5
0 …10 kPa ........................................................................................ >
E
5
0 …16 kPa ........................................................................................ >
E
6
0 …25 kPa ........................................................................................ >
E
7
-1 …+1 kPa ........................................................................................ >
L
8
-1,6 …+1,6 kPa ........................................................................................ >
L
9
-2,5 …+2,5 kPa ........................................................................................ >
M
6
-4 …+4 kPa ........................................................................................ >
M
7
-6 …+6 kPa ........................................................................................ >
M
8
Pressure connection
Threaded hose clamp connector (aluminum) for 6 / 4 mm hose..........................................................>
4
0
Threaded hose clamp connector (aluminum) for r 8 / 6 mm hose........................................................>
4
1
Signal output
No signal output....................................................................................................................................................>
0
Current output: 0-20mA linear, 3-wire.............................................................................................................>
A
Voltage output: 0-10V DC linear, 3-wire ............................................................................................................>
C
Current output: 4-20mA linear, 3-wire.............................................................................................................>
P
Supply voltage
24 V DC/AC nominal (12 - 32 V DC/AC operating).....................................................................................................>
K
Unit of measurement
Standard Units.................................................................................................................................................................... >
0
Display and switching element
3 1/2-digit-LED –2 sets of voltage free relay contacts ..............................................................................................................>
3
3 1/2-digit-LED –2 solid state switch output..............................................................................................................................>
6
Electrical connections
M12 round shell connector................................................................................................................................................................>
M
Mounting
Standard (rear fastening holes)................................................................................................................................................................ >
0
Top hat rail mounting................................................................................................................................................................................ >
S
Panel mounting kit.................................................................................................................................................................................... >
T
Wall mounting........................................................................................................................................................................................... >
W
13.1 Accessories
Ordering code
Designation
Pins
Application
Length
06401993
cable with M12 connector (female)
4-pins
for relay/switch
2 m
06401994
cable with M12 connector (female)
4-pins
for relay/switch
5 m
06401995
cable with M12 connector (female)
5-pins
for supply/output signal
2 m
06401996
cable with M12 connector (female)
5-pins
for supply/output signal
5 m
EU03.F300
PC-programming interface inclusive software

Technische Änderungen vorbehalten • Subject to change without notice • Changements techniques sous réserve
Fischer Mess- und Regeltechnik GmbH • Bielefelder Str. 37a • D-32107 Bad Salzuflen • Tel. [phone] • Fax [phone] •
eMail: [email protected] • www.fischermesstechnik.de
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