BEKA associates BA307SE,BA327SE Rugged 4/20mA Loop Powered Indicators Instruction Manual

Safe Use Conditions:
- For Ex ec, the instrument must be installed within an Ex e or Ex pzc panel box.
- For Ex tc, the instrument must be installed within an Ex tc panel box.
- Health and Safety Requirements for 4/20 mA Loop Powered Indicators BA307SE and BA327SE:
- Do not attempt to repair a defective BA307SE or BA327SE. Suspected units should be returned to BEKA associates or your local agent.

Installation Instructions:
- Refer to the complete instruction manuals for detailed dimensions.
- Connect terminals for alarms as per the provided diagram.
- Securely connect the M4 ground bolt internally to join the 4/20 mA return wire.

FAQs

Q: What are the main certifications for the BA307SE and BA327SE models?
- A: The models are Ex ec and Ex tc certified for use in Zone 2 and 22.

Q: Can I repair a defective BA307SE or BA327SE model myself?
- A: No, it is advised not to attempt repairing a defective unit. Please return suspected units to BEKA associates or your local agent for assistance.

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Descripción
Indicadores digitales alimentados por bucle de 4/20 mA para montaje en panel Ex ec que muestran la corriente de entrada en unidades de ingeniería.

Modelo BA307SE
BA327SE

Montaje Montaje en panel

Dígitos
4 x 15mm de alto
5 x 12.7mm de alto y gráfico de barras

Material de la caja 316 SS

Taladro del panel
90.0+0.5/-0 x 43.5 +0.5/-0 mm

Mayor seguridad «Ex ec» y protección contra la ignición por polvo mediante caja «tc». Ambos modelos cuentan con las certificaciones IECEx, ATEX, UKEX y norteamericana para gases y polvo

Código: II 3 G II 3 D

Ex ec ic IIC T5 Gc Ex tc ic IIIC T80°C Dc -40°C Tamb +70°C

Parámetros Ver certificados o manual de instrucciones completo.

Condiciones especiales para el uso seguro de ambos modelos.
Para Ex ec, el instrumento debe instalarse dentro de una caja de panel Ex e o Ex pzc.
Para Ex tc, el instrumento debe instalarse dentro de una caja de panel Ex tc.
Para todas las instalaciones, el instrumento debe alimentarse desde un circuito de energía limitada y las rejillas de ventilación situadas en la parte posterior del instrumento no deben obstruirse.
En el caso de instrumentos designados para equipos con tipo de protección mediante presurización, el circuito de alimentación deberá estar preparado para una corriente de cortocircuito prevista no superior a 10 kA.
El equipo debe instalarse en un panel que mantenga al menos uno de los siguientes tipos de protección:
Ex e IIC Gc -40°C Ta +70°C.
Ex pzc IIC Gc -40°C Ta +70°C.
Ex tc IIIC Dc -40°C Ta +70°C con una caja que cumpla los requisitos de: IP5X para grupos IIIB y IIIA o IP6X para aplicaciones del grupo IIIC.

Requisitos esenciales de salud y seguridad para los indicadores 4/20 mA alimentados
por bucle BA307SE y BA327SE.
ES

BA307SE

BA327SE

Instalación y conexiones para ambos modelos
1 Abrazadera de panel

2
3 22 cNm (1,95 lbf in) máx. Por último, coloque tapas protectoras.
Consulte los manuales de instrucciones completos para obtener las dimensiones.

8 9 10 11

Terminales para

retroiluminación opcional 12 13 14

Ala+rma- 1 A+larm- a 2

Terminales para alarmas opcionales

1234

+- –

+ Perno de tierra M4

Alimentación independiente Alimentado por bucle
Común

Los terminales 2 y 4 están
conectados internamente
para unir el hilo de retorno 4/20 mA.

Reparar
No intente reparar un BA307SE o BA327SE defectuoso. Las unidades sospechosas deben devolverse a los asociados de BEKA o a su agente local.
Eliminación
Los BA307SE o BA327SE deben desecharse correctamente, no en la basura doméstica.

EU Declaration of Conformity

This declaration of conformity for electrical apparatus is issued under the sole responsibility of the manufacturer.

Description of electrical apparatus The BA307SE is a 4 digit and the BA327SE is a 5 digit,
4/20mA loop powered indicator housed in a rugged panel
mounting stainless steel enclosure. Both are Ex ec and Ex tc certified for use in Zone 2 and 22.

Manufactured by BEKA associates Ltd, Old Charlton Road, Hitchin, Herts. UK. SG5 2DA

Council Directives this equipment complies with: 2014/34/EU (ATEX Directive) Relating to equipment and protective systems intended for use in potentially explosive atmospheres.
Provisions of the Directive fulfilled by the equipment: Group II Category 3G Ex ec ic IIC T5 Gc -40°C Ta +70°C Group II Category 3D Ex tc ic IIIC T80°C Dc -40°C Ta +70°C
Notified Body for EU-Type Examination and production INTERTEK ITALIA SPA 2575 Via Guido Miglioli, 2/A 20063 Cernusco sul Naviglio (MI) Italy. ITS-I 22 ATEX 24494X issue R.0 dated 2/05/2023

Compliant with standards: EN IEC 60079-0:2018; EN IEC 60079-7:2015+A1:2018; EN 60079-11:2012 and EN 60079-31:2014

2014/30/EU (EMC Directive)
Standards used: EN 61326-1:2021

2011/65/EU (RoHS Directive) relating to hazardous substances in electronic and electrical equipment.

2015/863/EU additional substances added by amending Annex II to Directive 2011/65/EU as regards the list of restricted substances.
mark first affixed in 2023

Authorised Signatory:

Issue 1 19th Sept 2023

Olivier Lebreton CEng MIET Managing Director

Los manuales, certificados y fichas técnicas pueden descargarse en https://www.beka.co.uk/307se_327se

Issue 1 2nd August 2024
BEKA associates Ltd. Old Charlton Rd, Hitchin, Hertfordshire, SG5 2DA, UK Tel: +44(0)1462 438301 e-mail: sales@beka.co.uk
web: www.beka.co.uk

DESCRIPTION

These panel mounting, intrinsically safe digital indicators display the current flowing in a 4/20mA loop in engineering units. They are loop powered but only introduce a 1.2V drop, which allows them to be installed into almost any 4/20mA current loop. No additional power supply or battery is required.
The four models are electrically similar, but have different size displays and enclosures.

Model Display Bezel size
BA307E 4 digits 15mm high 96 x 48mm BA327E 5 digits 11mm high 96 x 48mm and bargraph. BA308E 4 digits 34mm high 144 x 72mm
BA328E 5 digits 29mm high 144 x 72mm and bargraph.
This instruction manual supplements the instruction sheet supplied with each instrument.
The main application of all the models is to display a measured variable or control signal in a hazardous process area. The zero and span of the display are independently adjustable so that the indicator can be calibrated to display any variable represented by the 4/20mA current, e.g. temperature, flow, pressure or level.
All the models have been certified intrinsically safe for use in gas and dust hazardous areas by
Notified Body Intertek Testing and Certification Ltd and comply with the European ATEX Directive 2014/34/EU. The EC-Type Examination certificate specifies that under fault conditions the output voltage, current and power at the 4/20mA input terminals will not exceed those specified for simple apparatus in Clause 5.7 of EN 60079-11, which simplifies installation and documentation.
For international applications all models have IECEx certification which is described in Appendix 2.
For applications in the USA and Canada all models have FM and cFM certification, see Appendix 3.

OPERATION

Fig 1 shows a simplified block diagram of all the models. The 4/20mA input current flows through resistor R1 and forward biased diode D1. The voltage developed across D1, which is relatively constant, is multiplied by a switch mode power supply and used to power the instrument. The voltage developed across R1, which is proportional to the 4/20mA input current, provides the input signal for the analogue to digital converter.
Each time a 4/20mA current is applied to the instrument, initialisation is performed during which all segments of the display are activated, after five seconds the instrument displays the input current using the calibration information stored in the instrument memory. If the loop current is too low to power the instrument the indicator will display the error message ‘LPLo’.

2.1 Controls

The indicators are controlled and calibrated via four front panel push-buttons located below the display. In the display mode i.e. when the indicator is displaying a process variable, these push-buttons have the following functions:
P While this button is pushed the indicator will display the input current in mA, or as a percentage of the instrument span depending upon how the indicator has been conditioned.
When the button is released the normal display in engineering units will return.
The function of this push-button is modified when optional alarms are fitted to the indicator.
▼ While this button is pushed the indicator will display the numerical value and analogue bargraph* the indicator has been calibrated to display with a 4mAΦ input. When released the normal display in engineering units will return.
▲ While this button is pushed the indicator will display the numerical value and analogue bargraph* the indicator has been calibrated to display with a 20mAΦ input. When released the normal display in engineering units will return.
E No function in the display mode unless the tare function is being used.
P + ▼ Firmware number followed by version.
P + ▲ Direct access to the alarm setpoints when optional alarms are fitted to the indicator and the ‘ACSP’ access setpoints in display mode function has been enabled.
P + E Access to configuration menu via optional security code.
Note: * BA327E and BA328E only Φ If the indicator has been calibrated using the CAL function, calibration points may not be 4 and 20mA.

INTRINSIC SAFETY CERTIFICATION

All models have ATEX and IECEx gas and dust certification. This section of the instruction manual describes ATEX gas certification. ATEX dust and IECEx approvals are described in Appendixes 1 and 2.

3.1 ATEX gas certification

All the models have been issued with a common EC-Type Examination Certificate number ITS11ATEX27254X by Notified Body Intertek Testing and Certification Ltd. This confirms compliance with harmonised European standards and it has been used to confirm compliance with the European ATEX Directive for Group II, Category 1G equipment, Ex ia IIC T5 Ta = -40 to +70ºC. The indicators bear the community mark and subject to local codes of practice may be installed in any of the European Economic Area (EEA) member countries. ATEX certificates are also acceptable for installations in Switzerland.
This section of the instruction manual describes ATEX installations in explosive gas atmospheres conforming with EN60079-14 Electrical Installations design, selection and erection. When designing systems for installation outside the UK the local Code of Practice should be consulted.

3.2 Zones, gas groups and T rating
The indicators have been certified Ex ia IIC T5. When connected to a suitable system the indicators may be installed in:
Zone 0 explosive gas air mixture continuously present.
Zone 1 explosive gas air mixture likely to occur in normal operation.
Zone 2 explosive gas air mixture not likely to occur, and if it does will only exist for a short time.

Be used with gases in groups:

Group A propane
Group B ethylene
Group C hydrogen

Having a temperature classification of:

T1 450oC
T2 300oC
T3 200oC
T4 135oC
T5 100oC
At ambient temperatures between -40 and +70oC.
This allows the indicators to be installed in all gas
Zones and with most common industrial gases.

3.3 Special conditions for safe use
The ATEX certificate has an ‘X’ suffix indicating that special conditions apply for safe use.
WARNING To avoid an electrostatic charge being generated instrument enclosure should only be cleaned with a damp cloth.

SYSTEM DESIGN FOR GAS-HAZARDOUS AREAS

4.1 Transmitter loops
All indicator models may be connected in series with almost any intrinsically safe 4/20mA current loop and calibrated to display the measured variable or control signal in engineering units.
There are three basic design requirements:
1. The intrinsic safety output parameters of the 4/20mA loop, which are defined by the Zener barrier or galvanic isolator powering the loop, must be equal to or less than:
Uo = 30V dc
Io = 200mA
Po = 0.84W
2. The maximum permitted cable capacitance of the loop must be reduced by 13nF. The maximum permitted cable inductance is not reduced by the inclusion of an indicator.
3. The loop must be able to tolerate the additional 1.2V required to operate the indicator. When fitted with an optional backlight this increases to 5.0V if the backlight is loop powered. See 9.4.1
Figs 2a and 2b illustrate typical applications in which an indicator is connected in series with a 2-wire transmitter powered by a Zener barrier and alternatively by a galvanic isolator.

4.2 Remote indication

The indicators may be driven via an intrinsically safe interface from a 4/20mA safe area signal to provide a remote display within a hazardous area.
The type of intrinsically safe interface is not critical, either a Zener barrier or a galvanic isolator may be used, providing that Ui, Li and Pi of the indicator are not exceeded and the voltage capability of the 4/20mA signal is sufficient to drive the indicator plus the interface.
When a high integrity earth connection is already available, a Zener barrier is usually the least expensive option. If an earth connection is not available or isolation is required, a galvanic isolator is the correct choice.
If one side of the 4/20mA current loop may be earthed, a single-channel Zener barrier provides the lowest cost protection. If the 4/20mA signal is not isolated, then two Zener barriers, a two channel Zener barrier or a galvanic isolator must be used.
Fig 3 shows the alternative circuits which may be used.

INSTALLATION

5.1 Location
All the models have a robust glass reinforced modified PPO enclosure with a toughened glass window. The front of the indicator has IP66 protection and a gasket seals the joint between the instrument enclosure and the panel. The rear of the indicator has IP20 protection.
The indicators may be installed in any panel providing that the operating temperature is between –40ºC and +70ºC and intrinsic safety requirements are complied with.
Figs 4A and 4B show the overall dimensions of the 96 x 48mm and the 144 x 72mm instruments together with the recommended panel cut-out dimensions. To achieve an IP66 seal between the instrument enclosure and the instrument panel the smaller tolerance aperture must be used, and the 144 x 72mm models must be secured with four panel mounting clamps.
Although the indicator front panel provides IP66 protection it should be shielded from direct sunlight and severe weather conditions.

5.2 EMC
The indicators comply with the requirements of the European EMC Directive 2014/30/EU. For specified immunity all wiring should be in screened twisted pairs, with the screens earthed at one point within the safe area.

CONFIGURATION AND CALIBRATION

Indicators are configured and calibrated via the four front panel push-buttons. All the configuration functions are contained in an easy to use intuitive menu that is shown diagrammatically in Fig 7.
Each menu function is summarised in section 6.1 and includes a reference to more detailed information. When the indicator is fitted with alarms additional functions are added to the menu which are described in section 9.3
Throughout this manual push-buttons are shown as P, E, ▼ or ▲, and legends displayed by the indicator are shown within inverted commas e.g. ‘CAL’ and ‘ ALr2’.
Access to the configuration menu is obtained by operating the P and E push-buttons simultaneously. If the indicator security code is set to the default 0000 the first parameter ‘FunC’ will be displayed. If a security code other than the default code 0000 has already been entered, the indicator will display ‘CodE’. Pressing the P button will clear this prompt allowing each digit of the code to be entered using the ▲ and ▼ pushbuttons and the P button to move control to the next digit. When the correct four digit code has been entered pressing E will cause the first parameter ‘FunC’ to be displayed. If the code is incorrect, or a button is not pressed within twenty seconds, the indicator will automatically return to the display mode.
Once within the configuration menu the required parameter can be reached by scrolling through the menu using the ▲ and ▼ push-buttons as shown in Fig 6. When returning to the display mode following recalibration or a change to any function, the indicator will display ‘dAtA’ followed by ‘SAVE’ while the new information is stored in non-volatile memory.
All new indicators are supplied calibrated as requested at the time of ordering. If calibration is not requested, indicators will be configured as follows:

6.1 Summary of configuration functions
This section summarises each of the main configuration functions and includes a cross reference to a more detailed description. Fig 7 illustrates the location of each function within the configuration menu. The lineariser and the optional factory fitted alarms are described separately in sections 7 and 9.3 of this manual.

LINEARISER

A sixteen segment, seventeen break-point (0 to 16) lineariser may be selected in the ‘FunC’ section of the configuration menu. The position of each break-point is fully adjustable so that the slope of the straight line between break-points can be set to compensate for input non-linearity, thus allowing the indicator to display a non-linear process variables in linear engineering units. Each breakpoint must occur at a current greater than the preceding break-point and less than the following break-point, in the range 3.8 to 21.0mA. If this requirement is not observed when configuring the lineariser the indicator will display ‘FaiL’ and the configuration adjustment which produced the error message will be ignored. Fig 8 shows a typical linearised indicator characteristic.

Selecting ‘Lin’ in the ‘FunC’ section of the configuration menu activates the lineariser, this does not change the configuration menu shown in Fig 7, but the ‘CAL’ and ‘SEt’ functions are extended as shown in Fig 9. As with a linear indicator, calibration of the lieariser may be performed with an external current source using the ‘CAL’ function, or with the internal reference using the ‘SEt’ function.
The lineariser calibration is retained irrespective of how the indicator function ‘FunC’ is subsequently changed. It is therefore possible to select and deselect the lineariser without having to reconfigure it each time.
The lineariser calibration may be reset to the factory default settings without changing the indicator configure using the ‘LtAb’ function described in section 6.11.

7.1 Lineariser calibration using an external current source.

This method allows direct calibration of the lineariser with an external current source and is the preferred method when traceability is required. If the exact system non-linearity is unknown, this method also allows direct calibration from the variable to be displayed. e.g. the output from a level sensor in an irregular tank may be displayed in linear volumetric units by filling the tank with known incremental volumes and calibrating the indicator to display the sum of the increments at each break-point.
The number of break-point required should first be entered using the ‘Add’ and ‘dEL’ functions. In both these sub-functions the indicator initially displays the current break-point and the total number of break-points being used as shown below.

Documents / Resources

BEKA associates BA307SE,BA327SE Rugged 4/20mA Loop Powered Indicators [pdf] Instruction Manual
BA307SE, BA327SE, BA307SE BA327SE Rugged 4 20mA Loop Powered Indicators, BA307SE BA327SE, Rugged 4 20mA Loop Powered Indicators, Loop Powered Indicators, Powered Indicators

References

User Manual

BEKA associates BA307SE,BA327SE Rugged 4/20mA Loop Powered Indicators

Specifications

Product Usage Instructions