BEKA BA427E-SS User manual

Brand: BEKA

Model: BA427E-SS

Type: User manual

BEKA BA427E-SS is an intrinsically safe panel-mount Set Point Station enabling manual adjustment of 4/20mA loop current in hazardous areas. With a five-digit display configurable to show engineering units, it's ideal for precise control applications.

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

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

Separately

powered

Loop powered

Common

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

6.1V min

3 1

Instrument

power

supply

+24V

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.

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

Operating

mode

E E

P E

Security Code

Enter code by

pressing

and to

move to next digit

Code 0000 allows

direct access

to the menu

P E

P E P E

P P

P E

EP E

P E P E

EP E

P E

EP E P

EEE

Resolution

to select

1, 10 or 100

least

significant digit

adjustment

resolution

Decimal point

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

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

Define

Security Code

Enter by

pressing

and

to move to

next digit

Pre-set outputs

to select

required pre-set

5Et1 to 5Et5

Pressing

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

Reset set point

station to default

configuration

Confirm selection

by entering 5urE

by pressing

and

to move to

next digit

P E

Maximum output

rate of change

to set required

maximum rate

of output

change for full

scale travel

between

1 and 100

seconds

by pressing

and to

move to next

digit

0 disables

function

Function of (

button in

operating mode

to scroll

between

4-20mA,

% of span

and pre-sets

4-20

P5Et

One or two

handed

operation

to scroll

between

2 H

Prevents

adjustment

of output

current unless

is pressed

1 H

Output

current

adjustable

without

pressing

P E

Encoder

Set No. of

pulses per rev.

of external

encoder

adjustable

between 6 & 48

press

and

to move to

next digit

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