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BEKA BA374NG Manual

X na and ex tc two input timer or clock
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BA374NG
Ex nA and Ex tc
Two input
Timer or Clock
Issue 3
Issue: 3
5th March 2018

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Summary of Contents for BEKA BA374NG

  • Page 1 BA374NG Ex nA and Ex tc Two input Timer or Clock Issue 3 Issue: 3 5th March 2018...

  • Page 2: Table Of Contents

    6.5.34 Reset grand total from within the configuration menu: Clr Gtot 6.5.35 Security code: CodE 6.5.36 Reset configuration to factory defaults r5Et dEF The BA374NG is CE marked to show compliance with the European Explosive Atmospheres Directive 2014/34/EU and the European EMC Directive 2014/30/EU...
  • Page 3 7. TIMER APPLICATION EXAMPLES 9. OPERATION AS A CLOCK Measuring the time that a contact is closed Initialisation and loss of power Controlling a solenoid valve Controls when configured as a clock Cycling a solenoid valve Displays when configured as a clock Configuration as a clock 9.4.1 Accessing configuration functions...

  • Page 4: Description

    1. DESCRIPTION The BA374NG is an Ex nA and Ex tc certified, field The BA374NG has been ATEX certified Ex nA and mounting instrument with two inputs that can be Ex tc by Notified Body Intertek Testing and configured on-site as a Timer or as a Clock.

  • Page 5: Atex Ex Na Certification

    2. CERTIFICATION The BA374NG has ATEX and IECEx Ex nA gas and When connected to a suitable system the BA374NG Ex tc dust certification. The main sections of this Timer or Clock may be installed in: instruction manual describes ATEX gas certification.

  • Page 6: Power Supply

    For sensors requiring energising fitting an external link between terminals 3 and 4 of the BA374NG for input A and between terminals 7 and 8 for input b, connects an internal 7V, 6mA supply to the respective input.

  • Page 7: System Design For Hazardous Areas

    SYSTEM DESIGN FOR HAZARDOUS 3.1 Power supply AREAS. The BA374NG Timer or Clock requires a minimum of 10V between terminal 1 & 2 and consumes: When correctly installed in Zone 2 the BA374NG 10mA without optional backlight Timer or Clock may be connected to almost any plus when terminals 3 &...

  • Page 8: Sensor Input

    Zone 2 sensors as shown in Fig 2, or to safe area sensors as shown in Fig 3. The two BA374NG inputs are not used when the instrument is configured as a Clock. When designing a system it is important to...

  • Page 9: 2-Wire Proximity Detector Input

    See section 6.5.6. 500V rms insulation test to earth. Fig 2 illustrates how a BA374NG may be reset from 3.2.5 Magnetic pick-off input both the safe and the hazardous area.
  • Page 10 30V dc and the switched current is not greater than 200mA. Providing that the BA374NG Timer or Clock is correctly installed in Zone 2 the two control outputs may be used to switch suitably protected equipment located in a Zone 1 or 2 hazardous area, or equipment located in a safe area.

  • Page 11: Installation

    4. INSTALLATION Location The BA374NG Timer or Clock is housed in robust IP66 glass reinforced polyester (GRP) enclosure incorporating an armoured glass window and stainless steel fittings making it suitable for exterior mounting in most industrial on-shore and off-shore installations.

  • Page 12: Emc

    The BA374NG complies 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 in the safe area. Units of measurement and tag marking on scale card.

  • Page 13: Accessories

    5.4 Legend plate BA374NG Timer or Clock 10mA The BA374NG can also be supplied with a blank or Additional for backlight 16mA custom laser engraved stainless steel legend plate - Addition with terminals 3 & 4 linked see Fig 8.

  • Page 14: Operation As A Timer

    Internally powered Backlight Dual isolated Control Outputs The optional, factory fitted, dual isolated solid state control outputs may be independently configured to be activated in any of the timer's state allowing the BA374NG Timer to perform a wide variety of tasks.

  • Page 15: Controls When Configured As A Timer

    Controls when configured as a Timer Displays when configured as a Timer The BA374NG is controlled and configured via four The BA374NG has two digital displays and front panel push buttons. In the display mode i.e. associated annunciators as shown on front cover of when the instrument is timing the push button this manual.

  • Page 16: Timer Structure

    6.4 Timer structure Configuration as a Timer Fig 11 illustrates the Timer structure and function. It The BA374NG is configured via the four front panel applies when the instrument is measuring the time push buttons. All the configuration functions are between events or is controlling external events.

  • Page 17: Accessing Configuration Functions

    6.5.1 Accessing configuration functions All configuration functions and prompts are shown Throughout this manual front panel push buttons are on the upper eight digit display. Once within the shown as &, *, ( and ). Legends displayed main configuration menu the required parameter can by the instrument are shown in a seven segment be selected by scrolling through the menu using the font just as they appear on the instrument e.g.

  • Page 18: Summary Of Timer Configuration Functions

    CloC With CYCLE5 not enabled: All the entries in this Timer summary Select Lower display shows assume that BA374NG Set time 5et t configured as a Timer by selecting ELAP5E. Disables lower display. See section 6.5.3 See section 6.5.8 Configuration of Input A...
  • Page 19 Timer returns in stopped state as if having completed single timing cycle displaying Timer value when power Set time 5Et t was lost. Timing resumes when reset This is the BA374NG Timer's setpoint. followed start instructions When controlling an external event via received.
  • Page 20 EnbL, oP1 on, oP1 oFF and oP1 dELA. Reset to factory defaults See section 6.5.28 r5Et dEF Resets the BA374NG to the Timer factory default configuration shown in Control output enable EnbL Enables or disables control output 1 section 6.4 Instruction confirmed by without changing the parameters.

  • Page 21: Instrument Function: Function

    6.5.3 Instrument function: FunCtion Notes: The BA374NG may be configured as a Timer or as a Maximum voltage input +28V. Clock. This section of the instruction manual describes Timer, details Clock For sensors connected to input A that require energising i.e. a proximity detector, configuration see section 9.

  • Page 22: Lower Display: Di5P-2

    Stop Lower display shows the Timer's set time A low current b low current ControL 1 5Et t, to which the BA374NG will time-up A high current b high current ControL 2 to, or time-down from, depending upon the A low current...

  • Page 23: Units Of Display: Unit5

    6.5.10 Units of display: unit5 Defines the format of all displayed times, except the delay time of the status output and optional control outputs which are always shown in seconds and the grand total which is always shown in hours and tenths of an hour.

  • Page 26: Set Time: 5Et T

    When set as required, enter the selection and return external event via the optional control outputs the to the cycl cnt prompt in the sub-menu by operating BA374NG will time-down from the set time to zero or the ) button. time-up from zero to the set time.

  • Page 27: Direction Of Count: Up Or Dn

    The revised access code will be 6.5.19 Local reset: LoC r5Et activated when the BA374NG is returned to the The Local reset function contains two separate sub- display mode. functions rE5Et . Enbl and Glr Gtot which when...

  • Page 28: Status Output: 5Tat

    6.5.22 External reset 6.5.24 Status output enable: EnbL The Timer may be reset by connecting terminals This function allows the status output to be enabled RS1 and RS2 together. This function defines how or disabled without altering any other status output long the connection must exist before resetting parameters.

  • Page 29: Status Output Off At: 5Tat Off

    BEKA website. reset terminals RS1 and RS2 to automatically reset the BA374NG Timer. 6.5.29 Control output 1 enable: EnbL This delay can be adjusted in 1 second increments This function allows control output 1 to be enabled up to 32,400 seconds, which is 9 hours.

  • Page 30: Control Output On At: Op1 On

    RS1 and RS2 to automatically reset the BA374NG Timer. The delay can be adjusted in 1 second increments up to 32,400 seconds, which is 9 hours. If a delay is not required zero should be entered.

  • Page 31: Reset Grand Total From Within The Configuration Menu: Clr Gtot

    6.5.36 Reset configuration to factory defaults configuration menu: Clr Gtot r5Et dEF When the BA374NG is configured as a Timer this The grand total is the total run-time of the Timer that function resets the instrument to the Timer factory may be viewed by operating the ) and * push defaults shown in sections 6.5.

  • Page 32: Timer Application Examples

    At the end of the closed. process the Timer is required to automatically reset In this example a BA374NG is required to display within 10 seconds ready for the next timing cycle to the time that a Zone 2 hazardous area contact is be started.
  • Page 33 The required instrument configurations for this example are shown below. Function Display Setting Access code CodE 0000 Function FunCtion ELAP5E Input A inPut-A ContACt Input b inPut-b ContaCt De-bounce (both inputs) dEbounCE dEFAuLt Display 2 di5P-2 Start stop 5tAr5toP ControL 2 Units unit5 12 : 00 : 00...

  • Page 34: Cycling A Solenoid Valve

    7.3 Cycling an Ex nA solenoid valve In this example a BA374NG is required to cycle a Zone 2 Ex nA solenoid valve such that it is opens 4 times for 10 minutes at 15 minutes intervals. Once all 4 solenoid valve cycles have been completed a remote “sequence complete”...
  • Page 35 The required instrument configurations for this example are shown below: Function Display Setting Function FunCtion ELAP5E Input A inPut-A ContACt Debounce dEbounCE dEFAuLt Input b inPut-b ContACt Debounce dEbounCE dEFAuLt Display 2 di5P-2 Start stop 5tAr5toP ControL 2 Units unit5 12: 0 0: 0 0 Set time 5Et t...

  • Page 36: Maintenance When Configured As A Timer

    EN 60079-17 Electrical installations inspection and Fault finding during commissioning maintenance permits live maintenance in Zone 2 if a If a BA374NG fails to function as a Timer during risk analysis demonstrates that this does not commissioning the following procedure should be introduce an unacceptable risk.

  • Page 37: Servicing

    Servicing We recommend that faulty BA374NG Timers are returned to BEKA associates or to your local BEKA agent for repair. It is helpful if a brief description of the fault symptoms is provided. Routine maintenance The mechanical and electrical condition of the instrument should be regularly checked.
  • Page 38 OPERATION AS A CLOCK Initialisation and loss of power When configured as a clock the BA374NG can Each time power is applied to a BA374NG display local time in a variety of twelve or twenty four initialisation is performed. After a short delay the hour formats.
  • Page 39 Displays when configured as a clock 9.4.1 Accessing configuration functions The BA374NG clock has a single digital display plus Throughout this manual push buttons are shown as annunciators. &, *, ( and ) and legends displayed by the Clock are shown in a seven segment font just as...
  • Page 42 Clock Control output 1 can turn on (output configuration summary assume that closed) and off (output open) once or the BA374NG is configured as a twice in each twenty-four hour period. Clock by selecting CLoC. This function contains...
  • Page 43 Display Summary of function 9.4.3 Instrument function: FunCtion The BA374NG may be configured as a Timer or as a Security code Clock. This section of the instruction manual CodE Defines a four digit alphanumeric code describes Clock, details Timer that may be used to protect access to configuration see section 6.4.

  • Page 44: Enter Synchronising Time: 5Ync T

    9.4.6 Enter synchronising time: 5YnC t When the external reset terminals RS1 and RS2 are When the required option is displayed operating ) connected together the clock is stopped and the will enter the selection and return to the EnbL prompt displayed time is set to the synchronising time.

  • Page 45: Enable Control Output 1: Enbl

    9.4.11 Enable Control output 1: EnbL 9.4.13 Control output 2: oP2 This is a sub-function in the Control output 1 function Control output 2 is an optional factory fitted output oP1 which allows output 1 to be enabled or disabled which can be configured to turn on (output closed) without changing any of the on or off times and also and off (output open) twice in each twenty-four hour...

  • Page 46: Op2 : On 1; Op2 : Off

    Further protection is When the BA374NG is configured as a Clock, this provided by a separate security code. When this function resets the configuration to the Clock factory function is enabled the on and off times of the two defaults shown in sections 9.4 of this manual.

  • Page 47: Clock Configration Example

    10. CLOCK CONFIGRATION EXAMPLE Step 3 Select display format In this example a BA374NG is required to function Using the * or & button select di5PLAY in as a Clock displaying time in a 24 hour format the configuration menu and press ( which including seconds.
  • Page 48 ( to reveal button will save the configuration and return the EnbL prompt in the control output 2 sub- the BA374NG to the display mode with all menu. Follow the procedure described in the digits flashing indicating that the set time has to be entered.

  • Page 49: Maintenance When Configured As A Clock

    Zone 2 if a 11.1 Fault finding during commissioning risk analysis demonstrates that this does not If a BA374NG fails to function as a Clock during introduce an unacceptable risk. The removal of commissioning the following procedure should be...

  • Page 50: Routine Maintenance

    11.5 Guarantee Instruments which fail within the guarantee period should be returned to BEKA associates or our local agent. It is helpful if a brief description of the fault symptoms is provided. 11.6 Customer comments BEKA is always pleased to receive comments from customers about our products and services.

  • Page 51: Appendix 1

    Special conditions for safe use are specified by the Ex ic tc certificate indicated by the certificate A1.0 ATEX dust certification number's 'X' suffix. These state that the BA374NG In addition to ATEX Ex nA certification permitting Timer or Clock should be:...

  • Page 52: Appendix 2

    IECEx certification scheme and to view the BEKA associate certificates, please visit www.iecex.com A2.1 IECEx Certificate of Conformity The BA374NG Timer or Clock and the optional accessories have been issued with an IECEx Certificate Conformity number IECEx ITS 16.0005X which specifies the following...

  • Page 53: Appendix 3

    Canada. A3.0 cETL Mark For installations in the USA and Canada, the BA374NG Timer or Clock has ETL and cETL Ex nA and Ex tc approval, Control Number 4008610. Copies of the Authorisation to Mark may be down loaded...

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