2. BEKA
  3. BA427E-SS
BA427E-SS

BEKA BA427E-SS User manual

  • Hello! I'm an AI assistant that has read the instructions for the BEKA associates Set Point Station BA427E-SS. This document details how to install, configure, and operate the device, which allows for manual adjustment of 4/20mA loop current, has a configurable five-digit display, and is designed for use in hazardous areas. I'm ready to answer any questions you might have about the Set Point Station BA427E-SS and its operation.
  • How do I change the scale card?
    What is the default security code for accessing the configuration menu?
    How can I adjust the output current?
1. DESCRIPTION
The BA427E-SS is a rugged intrinsically safe Set Point Station
housed in a stainless steel panel mounting enclosure which
enables the current owing in a 4/20mA loop to be manually
adjusted from within a hazardous area. The BA427E-SS is loop
powered and includes a ve digit display that may be calibrated to
show the 4/20mA current in linear engineering units.
This abbreviated instruction sheet is intended to assist with
installation and commissioning, a comprehensive instruction
manual describing safety certication system design and calibration
is available from the BEKA sales oce or may be downloaded from
the BEKA website www.beka.co.uk/manuals.html.
Typical certication information label
In addition to conventional intrinsic safety certication, the
BA427E-SS may be installed in a certied Ex e, Ex p or Ex t
enclosure without invalidating the enclosure’s certication.
Special conditions for safe use
The IECEx, ATEX and UKEX certicate numbers have an ‘X’ sux
indicating that the following special installation conditions apply for
some applications.
When installed in an Ex e, Ex p or Ex t panel enclosure
all connections to the BA427E-SS must be made by
appropriately rated Zener barriers or galvanic isolators.
This means that when installed in an Ex e, Ex p or Ex t panel
enclosure, the BA427E-SS remains an intrinsically safe instrument
and must comply with the installation requirements shown in the
full instruction manual.
For use in Group IIIC explosive dust atmospheres, the Set
Point Station shall be mounted such that the instrument
terminals are protected by at least an IP6X enclosure.
This means that a BA427E-SS Set Point Station exposed to a IIIC
conductive dust atmospheres should be mounted in an IP6X panel
enclosure.
2. INSTALLATION
The BA427E-SS has IP66 front of panel protection but should
be shielded from continuous direct sunshine and severe weather
conditions. The rear of the instrument has IP20 protection.
105
8013
60
DISPLAY
Captive gasket
Maximum
panel thickness
8 mm
+
1 2 3 4
Terminals 2 & 4 are
internally linked for
joining return
4/20mA wire
12 13
Terminals for
optional external
rotary encoder
+
Terminals for
optional backlight
14
--
Separately
powered
Loop powered
Common
E
Connect M4 earth stud to panel enclosure in which Set Point Station is mounted
5 6 7
A B C
Common
Panel cut-out 90 +0.5 / -0.0 x 43.5 +0.5 / -0.0
Typical
terminals shown
Support panel wiring to prevent vibration damage
Fig 1 Cut-out dimensions and terminals
Slide a panel clamp into
the two grooves at each
corner of the instrument
Optional stainless
steel support plate
Captive gasket
Panel
enclosure
Secure each clamp with
a stainless steel washer and wing nut, tighten
22cNm (1.95lbf in) min. Finally fit protective caps.
Fig 2 Installation procedure
EMC
For specied immunity all wiring should be in screened twisted
pairs, with the screens earthed at one point within the safe area.
28V, 93mA Zener barrier
Diode return barrier
Safe areaHazardous area
4/20mA
4/20mA
6.1V min
3 1
Instrument
power
supply
+24V
0V
2-channel
Speed
controller
Fig 3 Typical control loop
Scale card
The Set Point Station’s units of measurement are shown on a
printed scale card visible through a window at the right hand side
of the display. The scale card is mounted on a exible strip that is
inserted into a slot at the rear of the instrument as shown below.
I
n
s
e
r
t
Unlock
Lock
Fig 4 Inserting exible strip carrying scale
card into slot at the rear of Set Point Station.
Thus the scale card can easily be changed without removing the Set
Point Station from the panel or opening the instrument enclosure.
New Set Point Stations are supplied with a printed scale card
showing the requested units of measurement, if this information
is not supplied when the Set Point Station is ordered a blank card
will be tted.
A pack of self-adhesive scale cards printed with common units of
measurement is available as an accessory from BEKA associates.
Custom printed scale cards can also be supplied.
To change a scale card, unclip the protruding end of the exible
strip by gently pushing it upwards and pulling it out of the enclosure.
Peel the existing scale card from the exible strip and replace it
with a new printed card, which should be aligned as shown below.
Do not t a new scale card on top of an existing card.
Align the self-adhesive printed scale card
onto the exible strip and insert the strip into
the indicator as shown.
Fig 5 Fitting scale card to exible strip
3. OPERATION
The BA427E-SS Set Point Station is controlled and congured via
four front panel push buttons located below the display. In the
operating mode i.e. when the Set Point Station is controlling the
loop current and the display is showing the output in engineering
units, these push buttons have the following functions:
)* + & Output current slowly decreases. After ve seconds
the rate of change accelerates so that large changes
may be made quickly. Push ) button rst followed by
& button to decrease output current.
)* + * Output current slowly increases. After ve seconds
the rate of change accelerates so that large changes
may be made quickly. . Push ) button rst followed
by * button to increase output current.
* Optional depending on conguration
) Pushing this button for 5 seconds enables the Set
Point Station output to be entered digit by digit in
engineering units using the & or * push button to
adjust the ashing digit and the ( button to move
control to the next digit. When set as required pressing
the ) button will enter the new set point value and the
output current will change.
( While this button is pushed the BA427E-SS Set Point
Station will display one of three alternatives depending
upon how the instrument has been congured. Output
current in mA; output current as a % of span or provide
access to the pre-set outputs.
& or * While this button is pushed the Set Point Station will
display the numerical value the Set Point Station has
been calibrated to display with a 4mA or 20mA output.
( + ) Access to conguration menu via optional security
code.
Align on
these
edges
Scale
card
Abbreviated instructions for
BA427E-SS rugged intrinsically safe panel
mounting Set Point Station
Issue 3
24th November 2022
BEKA associates Ltd. Old Charlton Rd, Hitchin, Hertfordshire,
SG5 2DA, UK Tel: +44(0)1462 438301 e-mail: [email protected]
web: www.beka.co.uk
BA427E-SS
Set Point Station
4. CONFIGURATION
The BA427E-SS Set Point Station is supplied calibrated as requested when ordered, if not specified default configuration will be supplied but can easily be changed on-site.
Fig 6 shows the location of each function within the configuration menu with a brief summary of the function. Please refer to the full instruction manual for detailed configuration information.
Access to the configuration menu is obtained by pressing the ( and ) buttons simultaneously. If the Set Point Station security code is set to the default 0000 the first parameter rE5n will
be displayed. If the Set Point Station configuration menu is protected by a non-default security code, CodE will be displayed and the non-default code must be entered to obtain access to
the menu.
Fig 6 Configuration menu
Old Charlton Rd, Hitchin, Hertfordshire, SG5 2DA, UK
Tel: +44(0)1462 438301 Fax: +44(0)1462 453971
e-mail: [email protected] web: www.beka.co.uk
Manuals, certificates and data-
sheets can be downloaded from
http://www.beka.co.uk/ba427e-ss
P
Operating
mode
EE
P
E E
P E
Security Code
Enter code by
pressing
or
and to
move to next digit
Code 0000 allows
direct access
to the menu
P
P E
E
P E
P E P E
P P
P E
E
EP E
P E P E
E
EP E
P E
E
P E
EP E P
EEE
Resolution
or
to select
1, 10 or 100
least
significant digit
adjustment
resolution
Decimal point
or
to select
position of
dummy
decimal
point
Calibration of set point station
display using external
current meter
Using AdJ in the 2Ero function
set the required output current
by pressing or
Press and enter the
corresponding display by
pressing or and
to move to the next digit
Similarly adjust 5PAn functions
Any output currents may be
used providing difference is
greater than 4mA
Alternative methods of calibrating the set point station display
P
Calibration of set point station
display using internal reference
Using the 4.000 function set required
display at 4mA output by
pressing or and
to move to the next digit
Similarly, using 20.000 function
set required display at 20mA output
P
P
Define
Security Code
Enter by
pressing
or
and
to move to
next digit
Pre-set outputs
or
to select
required pre-set
5Et1 to 5Et5
Pressing
or
and to
move to next
digit enter
required pre-set
value in
engineering
units
Only appears in
menu when
P5Et is selected
in P
.
Fn function
High and Low current output limits
Using Lo function set required
minimum output current by
pressing or and
to move to the next digit
Similarly, using Hi function set
required maximum output current
P
Reset set point
station to default
configuration
Confirm selection
by entering 5urE
by pressing
or
and
to move to
next digit
P E
P E
E
P E
E
P E
E
P
Maximum output
rate of change
or
to set required
maximum rate
of output
change for full
scale travel
between
1 and 100
seconds
by pressing
or
and to
move to next
digit
0 disables
function
Function of (
button in
operating mode
or
to scroll
between
4-20mA,
% of span
and pre-sets
4-20
PC
P5Et
P
One or two
handed
operation
or
to scroll
between
2 H
Prevents
adjustment
of output
current unless
is pressed
1 H
Output
current
adjustable
without
pressing
EE
P
E
E
P
P E
E
Encoder
Set No. of
pulses per rev.
of external
encoder
adjustable
between 6 & 48
press
or
and
to move to
next digit
P
E
The BA427E-SS is CE marked to show compliance with the European Explosive Atmospheres Directive 2014/34/EU and the European EMC Directive 2014/30/EU.
It is also UKCA marked to show compliance with UK statutory requirements Equipment and Protective Systems Intended for Use in Potentially Explosive Atmospheres Regulations
UKSI 2016:1107 (as amended) and with the Electromagnetic Compatibility Regulations
UKSI 2016:1091 (as amended).
Fig 6 Conguration menu
/