User Manual
Operating Manual
Digital Field Display PA 440
for IS-areas
READ THOROUGHLY BEFORE USING THE DEVICE
KEEP FOR FUTURE REFERENCE
ID: BA_PA440_EX_E | Version: 10.2021.0
1. General information
1.1 Information on the operating manual
This operating manual contains important information on
proper usage of the device. Read this operating manual
carefully before installing and starting up the pressure
measuring device.
Adhere to the safety notes and operating instructions which
are given in the operating manual. Additionally applicable
regulations regarding occupational safety, accident preven-
tion as well as national installation standards and engineer-
ing rules must be complied with!
For the installation, maintenance, and cleaning of the device,
you must absolutely observe the relevant regulations and
stipulations on explosion protection (VDE 0160, VDE 0165
and/or EN 60079-14) as well as the occupational safety
provisions.
The device was designed by applying the following stand-
ards:
EN IEC 60079-0:2018
EN 60079-11:2012
IEC 60079-0:2017 Edition:7.0
IEC 60079-11:2011 Edition:6.0
This operating manual is part of the device, must be kept
nearest its location, always accessible to all employees.
This operating manual is copyrighted. The contents of this
operating manual reflect the version available at the time of
printing. It has been issued to our best knowledge.
BD SENSORS is not liable for any incorrect statements and
their effects.
– Technical modifications reserved –
1.2 Symbols used
DANGER! – dangerous situation, which may result in
death or serious injuries
WARNING! – potentially dangerous situation, which
may result in death or serious injuries
CAUTION! – potentially dangerous situation, which may
result in minor injuries
! CAUTION! – potentially dangerous situation, which may
result in physical damage
NOTE – tips and information to ensure a failure-free
operation
1.3 Target group
WARNING! To avoid operator hazards and damages of
the device, the following instructions have to be worked
out by qualified technical personnel.
1.4 Limitation of liability
By non-observance of the operating manual, inappropriate
use, modification or damage, no liability is assumed, and
warranty claims will be excluded.
1.5 Intended use
- The field display PA 440 is supplied by the analogue
current loop and shows the measured value on the dis-
play. For monitoring the limit values optionally up to two
PNP open collector-contacts are available. As standard
the PA 440 is equipped with a LC-display, optionally a
LED-display is deliverable.
- The configuration is menu-driven via two push buttons
located in the front. Following parameters could be con-
figured: decimal point, zero point, end point, switch-on
and switch-off points, etc. Those parameters are being
stored in an EEPROM and, thus, are being kept also in
case of power breakdown. Limit exceeding in both direc-
tions can be displayed as a message. Furthermore an
access protection is provided.
- This operating manual applies to devices with explosion
protection approval and is intended for the use in IS-
areas. A device has an explosion protection approval if
this has been specified in the purchase order and con-
firmed in our order confirmation. In addition, the manu-
facturing label contains the -symbol.
- It is the operator's responsibility to check and verify the
suitability of the device for the intended application. If
any doubts remain, please contact our sales department
in order to ensure proper usage. BD SENSORS is not
liable for any incorrect selections and their effects!
- The technical data listed in the current data sheet are
engaging and must be complied with. If the data sheet is
not available, please order or download it from our
homepage. (http://www.bdsensors.de/products/down-
load/datasheets)
WARNING! Danger through improper usage!
1.6 Safety technical maximum values
AX15-PA440
IBExU08ATEX1126 X / IECEx IBE21.0023X
zone 1: II 2G Ex ia IIB T4 Gb
permissible temperatures for environment: -20 ... 70 °C
U
i
= 28 V, I
i
= 93 mA, P
i
= 660 mW, C
i
= 0 nF, L
i
= 0 µH
1.7 Package contents
Please verify that all listed parts are undamaged included in
the delivery and check for consistency specified in your
order:
- field display PA 440
- sheet of unit labels
- this operating manual
1.8 UL-Approval
The UL – Approval was done with respect to U.S. standards
norms which also correspond with the applicable Canadian
standards norms for safety.
Note the following points, so that devices fulfils the demands
of UL approval:
- only indoor use
- maximum operating voltage: see technical data
- The transmitter shall be supplied by Limited Energy
Source (per UL 61010) or NEC Class 2 Power Source.
2. Product identification
The device can be identified by its manufacturing label. It
provides the most important data. By the ordering code the
product can be clearly identified. The programme version of
the firmware, (e. g. P06) will appear for about 1 second in the
display after star
ting up the device. Please hold it ready for
inquiry calls.
Fig. 1 example of manufacturing label
! The manufacturing label must not be removed from the
device!
3. Mechanical installation
3.1 Mounting and safety instructions
WARNING! Install the device only when currentless!
WARNING! This device may only be installed by
qualified technical personnel who has read and under-
stood the operating manual!
DANGER! Caused by the explosion hazard following
instructions have to be complied with:
- The technical data listed in the EC type-
examination certificate are. If the certificate is not
available, please order or download it from our
homepage: http://www.bdsensors.de/products/
download/certificates
- Working on supplied (active) parts, except for in-
trinsically safe circuits, is principally prohibited dur-
ing an explosion hazard.
- Make sure that an equipotential bonding is in place
for the entire course of the line, both inside and
outside the intrinsic area.
- In case of increased danger of lightning strike or
damage by overvoltage, a stronger lightning pro-
tection should be planned.
- Observe the limiting values specified in the EC
type-examination certificate. (Capacitance and in-
ductance of the connection cable are not included
in the values.)
- Make sure that the entire interconnection of intrin-
sically safe components remains intrinsically safe.
The operator is responsible for the intrinsic safety
of the overall system (installation of intrinsic parts).
- The external circuit must prevent an external pow-
er-inflow to the contacts. Suitable signal separating
devices which fulfil this demand have to be used.
! Handle this high-sensitive electronic precision
measuring device with care, both in packed and
unpacked condition!
! There are no modifications/changes to be made on the
device.
! Do not throw the package/device!
! Remove packaging only directly before starting up the
device to avoid any damage!
! Do not use any force when installing the device to pre-
vent damage of the device and the transmitter!
3.2 General installation steps
- Carefully remove the pressure measuring device from
the package and dispose of the package properly.
- Next the field display has to be mount stationary on a
suitable fixing location via two appropriate fastening
screws.
3.3 Lead in the transmitter cable
- Lead in the connecting cable of the transmitter through
the cable gland on the left side. The cable length inside
the terminal box has to be long enough for connecting
the cords with the terminal clamps on the left (SEN-
SOR).
- Then tighten the cable gland by hand. Take care that
the cable is strain-relieved.
- Pay attention that the PTFE-filter on the gauge refer-
ence of BD SENSORS-transmitters may not be dam-
aged or removed.
3.4 Lead in the supply line
- Lead the supply line through the cable gland on the right
side. The cable length inside the terminal box has to be
long enough for connecting the cords with the terminal
clamps on the right (SUPPLY).
- Then tighten the cable gland by hand. Take care that
the cable is strain-relieved.
4. Special regulations for IS-Areas
4.1 Protection against electrostatic charge hazards
Different types of devices partially consist of chargeable
plastic components. These are, in particular, the carrying and
connection cables, terminal boxes as well as housing enclo-
sures. A potential electrostatic charge presents the danger of
spark generation and ignition. An electrostatic charge must
therefore be absolutely prevented.
Generally, a shielded cable must be used.
Avoid friction on the plastic surfaces!
Do not clean the device dry! Use, for example, a damp
cloth.
The following warning sign is, if applicable, attached to the
transmitter. It points once more to the hazard of electrostatic
charging.
Fig. 2 warning sign
! The warning sign must not be removed from the device!
4.2 Overvoltage protection
If the device is used as electrical equipment of category 2 G,
a suitable overvoltage protection device must be connected
in series (attend the valid regulations for operating safety as
well as EN60079-14).
4.3 Exemplary circuit description
The operation of an intrinsically safe device in intrinsic safe
areas requires special care when selecting the necessary
Zener barrier or transmitter repeater devices to be able to
use the device’s characteristics to the full extent. The follow-
ing diagram shows a typical arrangement of power supply,
Zener barrier and device.
Fig. 3 Circuit diagram
4.4 Exemplary circuit description
The supply voltage of e. g. 24 V
DC
provided by the power
supply is led across the Zener barrier. The Zener barrier
contains series resistances and Zener diodes as protective
components. Subsequently, the operating voltage is applied
to the device and, depending on the pressure, a particular
signal current will flow.
4.5 Functional selection criteria for Zener barriers and
galvanic power supply
The minimum supply voltage V
S
min
of the device must not fall
short since a correct function of the device can otherwise not
be guaranteed. The minimum supply voltage has been
defined in the respective product-specific data sheet under
"Output signal / supply".
When using a galvanically insulated amplifier with a linear
bonding, please attend that the terminal voltage of the device
will decrease like it does with a Zener barrier. Furthermore, it
has to be attended that the supply of the device will also
decrease with an optionally used signal amplifier.
4.6 Test criteria for the selection of the Zener barrier
In order not to fall below V
S
min
it is important to verify which
minimum supply voltage is available at full level control of the
device.
The technical data of the barrier will usually provide you with
the information needed for the selection of the Zener barrier.
However, the value can also be calculated. If a minimum
sup-ply of 16 V is assumed, then – according to Ohm’s law –
a particular voltage drop will result on the series resistance of
the Zener barrier. If, for a device with PNP contact, the
contact is also activated, the additional current flowing from
the contact to the load resistor will also flow through the
Zener barrier or the output of a transmitter repeater. The
higher the load current, the lower the available minimum
operating voltage. In the diagram shown, the maximum
current can be calculated from the voltage difference
(V
a
b
Barrier
e
max
) between input and output of the Zener barrier
divided by the series resistance of the Zener barrier.
The maximum signal current must be subtracted from this
value. If the available residual current is smaller than the
current required at the contact, either a different barrier or a
higher sup-ply voltage before the barrier should be chosen.
When selecting the power supply, the maximum operat-
ing conditions according to the EC type-examination
certificate must be observed. When assessing the pow-
er supply, please refer to their current data sheets to
ensure that the entire interconnection of intrinsically
safe components will remain intrinsically safe.
5. Electrical Installation
WARNING! Install the device only when currentless!
The supply must correspond to the safety class II
(protective insulation)!
The transmitter shall be supplied by Limited Energy
Source (per UL 61010) or NEC Class 2 Power Source!
Open the top cover; establish the electrical connection of
the device according to the following table and the wiring
diagram. Screw the top cover onto the box again.
Pin configuration:
De-
sign-
ation
Terminal
block
Electrical
connection
(cable colours
of BD SENSORS
transmitters)
has to be
connected
with
GND SENSOR
Potential refer-
ence clamp
(yellow/green )
cable shield of
transmitter
VS- SENSOR Supply - (brown)
neg. connecting
cable of transmitter
VS+ SENSOR Supply + (white)
pos. connecting
cable of transmitter
SP2 SP Contact 1
connecting cable
of transmitter
for contact 1
SP1 SP Contact 2
connecting cable
of transmitter
for contact 2
VS+ SUPPLY Supply +
pos. connecting
cable for pressure
signal
VS- SUPPLY Supply -
neg. connecting
cable for pressure
signal
GND SUPPLY
Potential
reference clamp
cable shield of
supply line
For the electrical connection a shielded and twisted
multicore cable is recommended.
The ground wires of all components have to be con-
nected when installing!
Pin configuration:
Supply:
The supply created by the electronics of the device is ap-
prox. 5.5 V
DC
. Please take this into consideration when
planning your power supply. The tolerances for the power
supply can be calculated as follows:
Minimum supply: V
Smin
= V
minTR
+ 6.5V
Maximum supply: V
Smax
= V
maxTR
+ 6.5V
V
min TR
= minimum supply of the used 2-wire transmitter
V
maxTR
= maximum supply of the used 2-wire transmitter
6. Initial start-up
WARNING! Before the initial start-up, the user has to
check that the device has been properly installed and
make sure that it does not have any visible defects.
WARNING! The device must only be started up by
qualified technical personnel that has read and under-
stand the operating manual!
WARNING! The device must only be used within the
technical specifications (compare the data in the data
sheet and the EC type-examination certificate)!
7. Operation
7.1 Configuration
The menu system is a closed system allowing you to scroll
both forward and backward through the individual set-up
menus to navigate to the desired setting item. All settings are
permanently stored in an EEPROM and therefore available
again even after disconnecting from the supply voltage. The
structure of the menu system is the same for all types of
devices, regardless of the number of contacts. However,
they only differ by the number of menus. Following figure and
the menu list shows all possible menus.
Please follow the manual meticulously and
remember that changes of the adjustable
parameters (switch-on point, switch-off point, etc.)
become only effective after pushing both buttons
simultaneously and leaving the menu item.
7.2 Password system
To avoid a configuration by unauthorized persons, the
possibility is given to lock the device by an access protection.
More information is given in menu 1 of the menu list.
7.3 Unit
The unit of the values to be measured is determined on
ordering. But it is also possible to change the unit later by
using one of the enclosed unit labels.
7.4 Description of hysteresis and compare mode
To invert the respective modes, you have to exchange the
values for the switch-on and switch-off points.
Fig. 4 compare mode Fig. 5 compare mode
inverted
Fig. 6 hysteresis mode Fig. 7 hysteresis mode
inverted
intrinsic safe area
contact
Supply
24 V
DC
contact
+ V
S
- V
S
+ V
S
- V
S
V
S
transmitter display
+ VS
- VS
EN
EC-type examination certificate no.,
explosion marking
Safety technical
maximum values
Type designation Ordering code Serial number
0637
© 2021 BD|SENSORS GmbH - All rights reserved.
supply +
A
pressure transmitter
PA 440
supply –