FISCHER DE45 series Instruction Manual

d e v e l o p i n g s o l u t i o n s
*09005071* DB_BA_EN_DE45_S Rev.B 09/16
*09005071*
Table of contents
1Safety Instructions
2Application Purpose
3Description of the Product and Functional Description
4Installation and Assembly
5Commissioning
6Maintenance
7Transport
8Service
9Accessories
10 Disposal
11 Technical data
12 Dimensional drawings
13 Order Codes
14 Manufacturer's Declarations and Certificates
1 Safety Instructions
1.1 General
This operating manual contains instruc-
tions fundamental to the installation,
operation and maintenance of the de-
vice that must be observed uncondi-
tionally. It must be read by the assembler, operator
and the specialized personnel in charge of the de-
vice before it is installed and put into operation.
This operating manual is part of the product and
must be kept close by where it is easily accessible
to the responsible specialized personnel.
The subsequent sections, in particular the instruc-
tions on assembly, commissioning and mainte-
nance, contain important safety instructions, the
non-observance of which can endanger persons,
animals, the environment and physical objects.
1.2 Personnel Qualification
The device may only be installed and commis-
sioned by specialized personnel familiar with the in-
stallation, commissioning and operation of this
product.
Specialized personnel are persons who can assess
the work they have been assigned and recognize
potential dangers by virtue of their specialized train-
ing, their skills and experience and their knowledge
of the relevant standards.
For explosion-proof models the specialized person-
nel must have received special training or instruc-
tion or be authorized to work with explosion-proof
instruments in explosion hazard areas.
1.3 Risks due to Non-Observance of Safe-
ty Instructions
Non-observance of these safety instructions, the in-
tended use of the device or the limit values given in
the technical specifications can be hazardous or
cause harm to persons, the environment or the sys-
tem itself.
The manufacturer will not be liable for damage
claims if this should happen.
1.4 Safety Instructions for the Operating
Company and the Operator
The safety instructions on correct operation of the
device must be observed. The operating company
must make them available to the installation,
maintenance, inspection and operating personnel.
Dangers arising from electrical components, energy
discharged by the medium, escaping
medium and incorrect installation of the
device must be eliminated. For more in-
Data Sheet and Operating Manual
DE45
Digital differential pressure switch / transmitter
DE45##00###K#6L#S####
Dust explosion protection Zone 22 dry dusts
 II 3D
Ex tc IIIB T125° IP65
-10°C ≤ Tamb ≤ 60°C

formation, please see the applicable national and
international regulations.
In Germany these are the DIN EN, UVV regula-
tions, specific industrial guidelines such as DVGW,
Ex, GL, etc., the VDE- regulations and the regula-
tions of the local energy supply companies.
The instrument must be decommissioned and se-
cured against inadvertent re-operation if a situation
arises in which it must be assumed that safe opera-
tion is no longer possible. Reasons for this assump-
tion could be:
•evident damage to the instrument
•failure of the electrical circuits
•extended storage in temperatures over 70°C
•considerable strain due to transport
•Repairs may be carried out by the manufacturer
only.
A professional single conformity inspection as per
DIN EN 61010, section 1, must be carried out be-
fore the instrument can be re-commissioned. This
inspection must be performed at the manufacturer's
location. Correct transport and storage of the in-
strument are required.
The subsequent sections, in particular the instruc-
tions on assembly, commissioning and mainte-
nance, contain important safety instructions, non-
observance of which can endanger persons, ani-
mals, the environment and physical objects.
1.5 Unauthorised Modification
Modifications of or other technical alterations to the
device by the customer are not permitted. This also
applies to replacement parts. Any modifications / al-
terations required must be carried out by Fischer
Mess- und Regeltechnik GmbH only.
1.6 Inadmissible Modes of Operation
The operational safety of this device can only be
guaranteed if it is used as intended. The device
model must be suitable for the medium used in the
system. The limit values given in the technical data
may not be exceeded.
1.7 Safe working practices for mainte-
nance and installation work
The safety instructions given in this operating man-
ual, any nationally applicable regulations on acci-
dent prevention and any of the operating company's
internal work, operating and safety guidelines must
be observed.
The operating company is responsible for ensuring
that all required maintenance, inspection and instal-
lation work is carried out by qualified specialized
personnel.
1.8 Pictogram explanation
WARNING!
… indicates a potentially dangerous
situation, non-observance of which
could endanger persons, animals, the
environment or objects.
INFORMATION!
… highlights important information for
efficient and smooth operation.
TIP!
… indicates recommendations that are
not specifically necessary in certain
situations but which could be useful.
2 Application Purpose
Display and switching device for differential pres-
sure of gaseous media. The device is to be exclu-
sively used for the applications agreed between the
manufacturer and user.
Explosion hazard area classification
The differential pressure switches / transmitters
DE45 are suitable for use as 'Electrical equipment
for use in areas with combustible dust', zone 22 -
dry dust.
Designation as per guideline 94/9/EC
3 Description of the Product and Func-
tional Description
3.1 Function 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.
When the pressure is equal, the measuring dia-
phragm is in its idle state. In case of pressure dif-
ference, the force acting on the measuring mem-
brane causes it to be moved towards the side of the
 II 3D
Ex tc IIIB T125° IP65
-10°C ≤ Tamb ≤ 60°C

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 display, switch contacts and an out-
put signal.
4 Installation and Assembly
The device is designed for installation onto flat as-
sembly plates. The device features four assembly
bores on its back, which can be used for dia. 3.5
mm tapping screws for screw connection to the as-
sembly plate.
Optionally, the device can be supplied with a wall
mounting plate (see order code).
At the factory, the device is calibrated for vertical
installation, but the installation position is arbitrary.
For installation positions deviating from the vertical,
the zero-point signal can be corrected by the inte-
grated zero-point adjuster (see 5.2.2).
The enclosure protection type IP 65 is only guaran-
teed, if a suitable power supply cable is used (see
accessories).
4.1 Process connection
•By authorized and qualified specialized person-
nel only.
•The pipes need to be depressurized when the
device 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 must be observed.
•The pressure sensing lines must be installed on
an incline so that no condensation pools can
form.
•The pressure sensing lines need to be kept as
short as possible and installed without sharp
bends to avoid interfering delay times.
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.
If the pressure sensing lines are already
pressurised 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, Explosion Pro-
tection Instructions
By authorized and qualified specialized person-
nel only.
Disconnect the system from the mains before
connecting the device.
•Do not take out the connecting plug while ener-
gized
•To guarantee safe operation of the instrument,
the supply circuit must satisfy the requirements
for zone 2, category 3, and the locally applica-
ble regulations and guidelines for the installa-
tion and operation of electrical systems in ex-
plosion hazard areas (e.g. EN 60079-14, EN
50014).
•The supply voltage (24 V DC) may not exceed
32 V DC. The supply circuit must be protected
by a 200mAT fuse.
•Refer to the technical data for the recommend-
ed power supply.
•The instrument may only be configured with the
EU03.F300 configuring adaptor outside of the
explosion hazard areas (i.e. outside zone 2).
Earth the unit.
4.3 Connection diagram
internal bridge
Connector 1
Connector 2
Switch contact 1
Switch contact 2
(+) Signal
(+) Supply
(-) Signal
(-) Supply
SW
BR
WS
BL
SW
BR
BL
WS
Connector guide
Earth connection

Supply voltage / signal output:
The nominal supply voltage and the permissible
range can be found in the technical data.
The admissible load / resistance for the signal out-
put is stated in the technical data.
The connection "Signal ground“ is connected inter-
nally 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.
Check that the pressure connections do not leak
before commissioning.
5.1 Display
The 3.5 digit LCD display represents the current dif-
ferential pressure in normal mode. The selected
measuring unit is illuminated on the right of the dis-
play. (Note: The units shown on the screen may
deviate from the actual version). Above the display
the two light diodes indicate the status of the
switching outputs (LED shines = switch is closed).
When setting the parameters, the display either
shows the respective menu item or the associated
parameter value. The device continues to function
whilst the parameters are being set; apart from two
exceptions, the changes come into effect instantly.
The exceptions here are a change of switching
times - here the previously valid time must have run
down and a change to the support point table (see
5.2.7). All output signals and switching statuses are
frozen here until the changes are completed.
5.2 Configuration
For commissioning there is a multitude of setting
options for the optimum adaptation of the device to
the measuring point and task at hand. This section
covers these options step by step.
Depending on the current device model
(no transmitter signal / voltage output /
current output) other menu items are not
available. For example, all characteristic curve func-
tions are faded out in the menu if the device does
not have a signal output.
All the device settings can be made easily on the
PC using the PC adapter. Here, the parameters are
directly visible and accessible. Also, the entire con-
figuration can be loaded, saved and documented as
a printout. For more information about this program,
please refer to the documentation enclosed with the
PC adapter.
Please note that this parameter setting
mode can only be carried out in ex-free
zone, i.e. outside zone 22.
5.2.1 Selecting the pressure unit
Connect the device to the power supply and ensure
that it is not under any pressure (if necessary, dis-
connect any pressure lines).
First select the pressure measuring unit. The unit
that is currently valid is illuminated to the right of the
number displays. Press the middle key ûto make
the setting and then search for the parameter EIN
using the right-hand key þ.Press ûagain and then
change the displayed value using þor ÿ. Once the
value has been selected, save it with ûand EIN will
appear again in the display.
Then leave the setting mode. Press ÿuntil ESc ap-
pears and the û. The current measured pressure is
shown again. The correct pressure unit is now illu-
minated to the right of this.
The display can only show up to ±1999.
Therefore in some cases it may not be
possible to select all stated pressure
units
5.2.2 Zero point control and adjustment
If the device does precisely indicate zero at this
point of time, parameter OF1 enables you to adjust
the measuring value exactly to zero. To do so you,
you have to set the measuring value indicated be-
low OF1 to zero.
After zero-point adjustment, the pressure sensing
lines can be reconnected.
5.2.3 Damping and zero-point stabilising
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 effect of parameter DAM (on the reading, output
signal and switching points, but not on the measur-
ing cell!) can be compared to that of a capillary
throttle. You can set the response time to pressure
jumps ranging from 0.0 to 100.0 seconds. But with
maximum damping, it will take more than 2 minutes
for the reading to also reach zero after a pressure
jump from nominal pressure (100 %) to zero!

In many cases the unsteady readings are not a
problem in normal mode, but can be a problem in
idle mode, i.e. if one expects a zero (differential)
pressure. In such situations, parameter NP can be
applied. Its value defines a range of measurement
values (same as with the offset) around zero, for
which the measuring value is set to zero. Therefore,
if a value of 0.08 mbar ( 8 Pa) is entered for NP, all
pressures from -0.08 mbar (-8 Pa) to +0.08 mbar
( +8 Pa) become zero. Only if the pressure exceeds
these limits, the reading will not indicate zero any
more. When reaching double the value 0.16 mbar
(16 Pa), the measuring pressure and reading match
again.
5.2.4 Setting the output signal
The transmitter output signal initially depends on
the sensed pressure. However, you have the option
of adjusting the output signal to a large extent to
suit your requirements. The basic measuring range
(indicated on the type label) and the type of output
signal (voltage / current) are not variable.
Parameters MA (start of measuring range) and ME
(End of measuring range) initially define the two
pressures between which the output signal will
change at all. Both values are adjustable across the
entire basic measuring range (e.g. 400 Pa). The set
values always refer to pressure (in the relevant
measuring unit) and are converted when the meas-
uring unit is changed. However, the signal values
(current or voltage) for MA and ME are invariable
(type label, e.g. 0…10 V or 4…20 mA).
If MA is smaller than ME, this is called an increasing
characteristic curve; the output signal increases due
to the increasing pressure. If ME is smaller than MA,
this is a decreasing characteristic curve and the
output signal decreases due to decreasing pres-
sure.
The difference between values MA and ME shall at
least be 25 % of the basic measuring range (in our
example this is 100 Pa). The software does not
provide for greater spreads (you cannot exit the
menu if wrong values were entered for the range).
5.2.5 Output signal limits (Namur)
Regardless of the pressure, the three parameters
oG1, oG2 and oEr define the limit values for currents
or voltages that may not be undercut or exceeded.
The limit values take precedence over the range
defined by MA ... ME!
These parameters primarily serve to suppress error
messages in downstream systems caused by brief
overstepping of measuring ranges. oG1 is only rele-
vant for devices with an output signal 4..20 mA be-
cause here a value below 3.8 mA is often assessed
as an error value. oG2 can be used for all outputs
(voltage and current) to limit the maximum value to
e.g. 10.2 V.
The value defined via the parameter oEr is issued if
the device detects an internal error and can no
longer work correctly. However, not all possible er-
rors and defects can be detected by the device.
If you set oG1 = OG2 = 0, the output signal will no
longer be checked for limits.
If you set oG1 to the maximum value (11 V or 21
mA), you can use OG2 to set the output signal from
zero to the maximum value regardless of the pres-
sure. It is not necessary to quit the menu item, the
output will be adjusted directly. You then operated
the device as a signaller and can easily check fur-
ther signal processing.
5.2.6 Transfer function / characteristic curve
In some applications, measuring pressure is an in-
direct unit for the actual measuring variable. Flow
measurements via a panel or determining the filling
level by means of hydrostatic pressure measure-
ments are two typical examples of this. In these
cases, you might want to change the output signal
of the transmitter to a non-linear characteristic
curve so that the following analysis receives a sig-
nal that is linear-proportional to the actual measur-
ing variable (e.g. volume in m³ or volume flow cm³/s
etc.)
The parameter Fallows you to select between the
following variants:
•0: linear characteristic curve (standard)
•1: square rooted characteristic curve
•2: flat cylindrical tank
•3..30: Support point table with 3 to 30 pairs of
values
The tables of type F= 0 to F= 2 are not visible. In-
ternal values are used here to calculate the table.
These values are invariable.
The following applies for all tables: at MA 0% of the
output signal (i.e. 0 V, 0 mA or 4 mA) is issued and
at ME 100% of the output signal (10 V or 20 mA) is
issued. At F= 3..30 you can only influence the 1..28
interim values. You have access to the star and end
value via the parameters MA and ME. Therefore,
when these values are changed, the table is also
deleted and F= 0 is set!
Whenever you change the value from F,
the program creates a new table. All
previous values in the table are removed
and replaced with new linear entries.
5.2.7 Characteristic curve (F= 3..30)
If the value of Fis greater than or equal to 3, there
is a submenu LIn. here you can access all table val-
ues apart from the table start (MA) and end (ME). This
submenu has its own entry and exit point that is
shown with End. The table is only saved if you return

to the main menu at this point, i.e. if you change to
the parameter LIN again via the key û. If the table is
not structured correctly, an error message Err will
appear here and you cannot quit the submenu.
The table comprises 1...30 pairs of values. One
value ( I01to I30 or u01to u30 ) defines the height of
the output signal, the associated value P01to P30
defines the pressure at which the output signal
should be issued.
Entering or changing values in the table via the
membrane keypad is tiresome and prone to errors.
This is only intended as an emergency solution in
case access to the PC adapter is not possible.
The table is correct if the following applies for all
signal values: The value is larger than the previous
value. Either larger (rising characteristic curve) or
smaller (falling characteristic curve) apply to the
pressure values accordingly. No transition from ris-
ing to falling characteristic curves or vice versa is
allowed.
5.2.8 Switch points
The two switch outputs  are configured by four
parameters respectively.
The function of the switching output 1 is determined
by the parameters R1A, R1E, R1D and R1F.
The function of the switching output 2 is determined
by the parameters R2A, R2E, R2D and R2F.
R1A defines the switch-off point, R1E defines the
switch-on point from switch output 1. The values
are set in the currently valid measuring unit (shown
on the right). Together, the two parameters R1A and
R1E determine the switch function of switch output 1:
If R1A is smaller than R1E, the output switches on, if
the measured value exceeds R1E. It is only switched
off again if the measured value R1A is undercut (hys-
teresis function).
If R1A = R1E, the output switches on if the measured
value exceeds R1E and off, if the measured value
undercuts R1A.
If R1A is larger than R1E, the output switches on, if R1E
< measured value < R1A applies (window function).
Both parameters can be set independently over the
entire range. If the measuring unit is switched over,
the switching points are converted accordingly.
Rounding errors may cause deviations in the last
position.
R1D allows the reaction of the switch output 1 to be
delayed by between 0.0 and 100.0 s. This value
applies equally for switching on and off.
R1F reverses the function of the switch output. If the
value = 1, the switch output works as an NO con-
tact, if the value = 2, the switch output works as a
NC contact.
5.2.9 Password
The last menu item -P- is used to enter a password.
A value between 001 and 999 can be selected for
the password. The value 000 cancels the password
function.
If a password has been issued, the text PAS appears
after ESc and û,and you need to enter the correct
value using ûand þ,ÿ. You will only arrive at all
other menu items after doing this. In the event of an
error, the display will jump back to the start of the
menu ESc.
5.2.10 Display options
The parameter D0 enables the reading to settle if
the measuring value fluctuates heavily. This filter
function is similar to the dAM function, but only im-
pacts on the reading not on the output signal.
In addition, the display can be shut down partially
(D0 = -1, only the switch point LEDS are controlled)
or in full (D0 = -2).
5.2.11 Reset to default
The function res allows all settings to be reset to
default values. The default values can only be de-
fined per PC interface.
5.2.12 Free unit
Parameters MAF,MEF and dPF.
If the device is designed for a "free" third unit
(membrane symbol: ), the display can be scaled
infinitely.
The measuring range defined by the values MA and
ME is converted to MAF and MEF. The table function
( F) is also taken into account. The value of dPF de-
termines the position of a decimal point.

5.3 Parameter overview
After switching on the device, it will briefly indicate
the software version number and before entering
the normal operating mode. By using the middle û
key on the membrane keypad you can access the
parameter menu. The reading now shows the text
ESc. By using the right þkey, you can choose the
parameters from the following list one by one:
Note:
Depending in the device model, individ-
ual parameters may not be available if
the device does not have this feature.
PAS
Enter password (only comes up if
password is active), value range
001..999
DAM
Damping (jump response time T90),
value range 0.0..100.0s
D0
Display damping
Value range 0..100. plus
-1 = no digital value and
-2 = display completely switched off.
R1A
Switch-off point of switching output 1
R1E
Switch-on point of switching output 1
R1D
Switch delay from switch output 1
Value range 0.0 s to 100.0 s. This val-
ue applies equally for switching on
and off.
R1F
Switch function of switch output 1
If the value = 1, the switch output
works as an NO contact, if the value =
2, the switch output works as a NC
contact.
R2A
Switch-off point of switching output 2
R2E
Switch-on point of switching output 2
R2D
Switch delay from switch output 2
Value range 0.0 s to 100.0 s. This val-
ue applies equally for switching on
and off.
R2F
Switch function of switch output 2
If the value = 1, the switch output
works as an NO contact, if the value =
2, the switch output works as a NC
contact.
EIN
Measuring range unit
The selection is backlit on the right
next to the display. Not all basic
measuring ranges allow free switch-
ing. The respective unit size can only
be selected if the basic measuring
range of the device can be shown
sensibly.
MA
Start of measuring range
Set the measuring value that results in
a minimum output signal (depending
on the version, this is 0 V, 0 mA or
4 mA).
ME
End of measuring range
Set the measuring value that results in
a maximum output signal (depending
on the version, this is 10 V or 20 mA).
DPF
Decimal point position
for free unit.
MAF
Start of measuring range
display value for free unit.
MEF
End of measuring range
display value for free unit.
NP
NP Zero-point stabilising
The range is 1/3 of the basic measur-
ing range. The value acts symmetri-
cally around real zero.
OF1
Offset correction for measuring input 1
range +/- 1/3 of the basic measuring
range.
F
Characteristic line function
0 = linear,
1 = rooted,
2 =flat cyl. tank
3...30 = table
lIn
Menu indent table processing
oG1
Limit value for minimum output signal
OG2
Limit value for maximum output signal
OEr
Error signal
Output signal in error case
RES
Reset for all reset settings to default
values (presetting of defaults only via
PC).
-P-
Password entry
All values from 001 to 999 are allowed
as a password. Value 000 does not
hold password protection.
If the password is forgotten, it can only
be reset by the manufacturer or overwrit-
ten via the PC adapter.

6 Maintenance
The instrument is maintenance-free.
We recommend checking the instrument at regular
intervals to ensure reliable operation and a long
service life.
•Check the reading.
•Check the switching function in combination
with downstream components.
•Check the leak-tightness of the pressure con-
nection lines.
•Check the electrical connection (cable clamp
connections).
The precise test cycles need to be adapted to the
operating and ambient conditions. If various instru-
ment components interact, the operating instruc-
tions of all the other instruments also need to be
observed.
7 Transport
The measuring device must be protected against
impacts. It may only be transported in packaging
specifically intended for transport.
8 Service
All damaged or faulty devices must be sent directly
to our repair department. Please coordinate all
shipments with our sales department.
Processed media residues in and
on dismantled devices can be a hazard
to people, animals and the environment.
Take adequate preventive measures. If
required, the devices must be cleaned thoroughly.
9 Accessories
•Set of cables with M12 connectors (please en-
quire)
•PC adapter with type EU03F300 software
10 Disposal
For the sake of the environment ....
Please help to protect our environ-
ment and dispose of or recycle used
instruments as stipulated by the ap-
plicable regulations.

11 Technical data
+ ranges (0 … )
± ranges
Measuring Range
mbar
4
6
10
16
25
40
60
100
160
250
2.5
4
6
10
16
25
40
60
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
Static operating
pressure
max.
mbar
50
100
250
500
1500
50
100
250
500
Bursting pressure
mbar
150
300
750
1500
3000
150
300
750
1500
Characteristic curve
deviation
max.
%FS
1.0
1.0
typ.
%FS
0.5
0.5
Tk span°°)
max.
%FS/10K
1.0
0.3
0.4
1.0
0.5
0.3
typ.
%FS/10K
0.3
0.3
Tk zero-point °°)
max.
%FS/10K
1.0
0.4
1.0
0.5
0.4
typ.
%FS/10K
0.2
0.2
°: Characteristic curve deviation (non-linearity and hysteresis) at 25°C, basic measuring range (linear characteristic curve, not spread)
°°: with reference to the basic measuring range (not spread), Compensation range 4..60°C.
General points
Adm. ambient temperature
-10 °C ≤ Tamb ≤ 60 °C
Adm. media temperature
-10 °C … 60 °C
Adm. storage temperature
-20 °C … 70 °C
Enclosure protection class
IP65 acc. to DIN EN 60529
Electrical data
Power supply
A CE-compliant power supply unit with a 200mAT fuse only
may be used as a power supply.
Rated Voltage
24 V AC/DC
Adm. operating voltage Ub
12 … 32 V AC/DC
Electrical connection type
Three-conductor
Analogue output signal
0 … 20 mA, 4 … 20 mA, 0 … 10 V
Admissible apparent ohmic re-
sistance
for current output
For voltage output
RL≤ ( Ub-4 V)/0.02 A für Ub≤ 26V
otherwise RL≤ 1100Ω
RL≥ 2kΩ for Ub≥ 15V
RL≥ 10kΩ for Ub= 12…15V
Characteristic curve
programmable linear, square rooted, table
Power consumption
approx. 2 W / VA
Display
3.5 character LED
Ports
Process connection
2 x aluminium hose screw connection for 6/4 or 8/6 mm hose
electr. connection
2 x round plug connector
Connector 1: 5 pin M12 (male) for supply and analogue output signal
Connector 2:4 pin M12 for (male) switch contacts
Materials
Housing
Polyamide PA 6.6
Media-contacting material
Silicon, PVC, aluminium, brass
Assembly
Bore-holes on the reverse side for attachment of the assembly panels
panel mounting set
Wall mounting by means of assembly plate
Designation guideline 94/9/EC
II 3D Ex tc IIIB T125° IP65
11.1 Programming
Programmed via the membrane keyboard with menu navigation; locked with a password.
Settings
Attenuation
0.0 … 100.0 s (jump response time 10 / 90 %) for signal output; separately also for display
Switch output 1 / 2
Switch-off point, switch-on point, response time (0 ... 100 s); function (NO contact /NC contact)
Measuring range unit
m / Pa / "free unit"È, starting value, end value and decimal point for "free unit"
Zero-point stabilising
0 ... 1/3 of the basic measuring range (1)
Output signal
User-definable within the basic measuring range (2)
Zero point correction
± 1/3 of the basic measuring range (3)
Implementation of characteristic curve
linear, square rooted, flat cyl. tank, 3...30 support points
Password
001 ... 999 (000 = no password protection)
Comments:
(1) Measured values (around zero) are set to zero, e.g. to suppress leak flow rate.
(2): Maximum effective spread 4:1. Only the output signal is influenced.
This in turn enables a decreasing characteristic curve, if the start of the measuring range > end of the measuring range.
(3): Zero point correction for compensation of various installation positions.

12 Dimensional drawings
12.1 Panel mounting set
Wall mounting plate
(optional)
Rear view
Without wall mounting plate
Hose screw connection for
6 or 8 mm hose
Connector 1
Connector 2
Boreholes for
tapping screws diam. 3.5 mm
Wall thickness 3-5
mm
Earth connection

13 Order Codes
Digital differential pressure switch / transmitter,
with 3 ½-digit LED display
Type DE45
0
0
K
6
L
S####
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
Aluminium screw connection for 6 / 4 mm hose...................................................................................... >
4
0
Aluminium screw connection for 8 / 6 mm hose...................................................................................... >
4
1
Electrical output signal
without analogue electrical output signal.............................................................................................................>
0
0 –20 mA 3-wire (STANDARD) .........................................................................................................................>
A
0 –10 V DC 3-wire (STANDARD) ......................................................................................................................>
C
4 –20 mA 3-wire (STANDARD) .........................................................................................................................>
P
4 - 20 mA 3-wire, reduced, only for measuring unit Nm³/h, m³/h, l/min .....................................................>
F
0 - 10V 3-wire, reduced, only for measuring unit Nm³/h, m³/h, l/min .........................................................>
G
Operating voltage
24 V DC/AC (12 - 32 V DC/AC).................................................................................................................................. >
K
Measuring unit
Standard pressure units......................................................................................................................................................>
0
Nm³/h ..................................................................................................................................................................................>
A
m³/h.....................................................................................................................................................................................>
B
0 - 100%..............................................................................................................................................................................>
C
mmWS ................................................................................................................................................................................>
D
mmWC................................................................................................................................................................................>
E
l/min.....................................................................................................................................................................................>
F
Measured value display / contact elements
3 1/2-digit LED –2 semiconductor switches ............................................................................................................................. >
6
Electrical connection
M12 connector socket Ms-nickel-plated............................................................................................................................................>
L
Assembly option
Standard (attachment boreholes on rear side).........................................................................................................................................>
0
Panel mounting set ...................................................................................................................................................................................>
T
Wall mounting...........................................................................................................................................................................................>
W
Customer-specific no.
Identification for use in Zone 22 - Risk from dry dust:  II 3D Ex tc IIIB T125°C IP65................................................................... >
S####

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
13.1 Accessories
Purchase or-
der number
Designation
No. of
Poles
Usage
Length
06401993
Connection cable with M12 connector
4-pole
for switching outputs
2 m
06401994
Connection cable with M12 connector
4-pole
for switching outputs
5 m
06401995
Connection cable with M12 connector
5-pole
for supply / signal
2 m
06401996
Connection cable with M12 connector
5-pole
for supply / signal
5 m
EU03.F300
Adapter for parameterization via PC software
14 Manufacturer's Declarations and Certificates