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Omega Engineering CN3271 Series User Manual

High-low limit alarm unit
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CN3271-add2.pmd
1
19/08/2004, 16.36

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Summary of Contents for Omega Engineering CN3271 Series

  • Page 1 CN3271-add2.pmd 19/08/2004, 16.36...
  • Page 2 OMEGAnet OMEGAnet OMEGAnet OMEGAnet® On-Line Service OMEGAnet On-Line Service On-Line Service On-Line Service On-Line Service www.omega.com www.omega.com www.omega.com www.omega.com www.omega.com For immediate technical or For immediate technical or For immediate technical or For immediate technical or For immediate technical or application assistance: application assistance: application assistance:...

  • Page 3: Table Of Contents

    APPROVALS This instrument is U.L. and c.U.L. approved as controller. CONTENTS MOUNTING REQUIREMENTS ... 1 DIMENSIONS AND REAR TERMINALS ... 2 PANEL CUT OUT ... 3 WIRING GUIDELINES ... 3 PRELIMINARY HARDWARE SETTINGS ... 8 CONFIGURATION PROCEDURE ... 9 OPERATING MODE ... 15 Normal display mode ...

  • Page 4: Mounting Requirements

    MOUNTING REQUIREMENTS MOUNTING REQUIREMENTS MOUNTING REQUIREMENTS MOUNTING REQUIREMENTS MOUNTING REQUIREMENTS Select a mounting location with the following characteristics: 1) Minimal vibration. 2) An ambient temperature range between 0 and 50°C (32 and 122 °F). 3) Easy access to the rear of the instrument. 4) No corrosive gases (sulfuric gas, ammonia, etc.).

  • Page 5: Dimensions And Rear Terminals

    DIMENSIONS AND REAR TERMINAL BLOCKS DIMENSIONS AND REAR TERMINAL BLOCKS DIMENSIONS AND REAR TERMINAL BLOCKS DIMENSIONS AND REAR TERMINAL BLOCKS DIMENSIONS AND REAR TERMINAL BLOCKS Chromalox Without RS-485 With RS-485 Fig.2 LHL-1-NEUTRO.pmd 19/04/2004, 15.06...

  • Page 6: Panel Cutout

    PANEL CUTOUT PANEL CUTOUT PANEL CUTOUT PANEL CUTOUT PANEL CUTOUT Fig.3 LHL-1-NEUTRO.pmd WIRING GUIDELINES WIRING GUIDELINES WIRING GUIDELINES WIRING GUIDELINES WIRING GUIDELINES A) Measuring Inputs A) Measuring Inputs A) Measuring Inputs A) Measuring Inputs A) Measuring Inputs NOTE: Any external components (like Zener di- odes, etc.) connected between sensor and input terminals may cause errors in measurement due to excessive and/or not balanced line resistance or...

  • Page 7: Linear Input

    RTD INPUT RTD INPUT RTD INPUT RTD INPUT RTD INPUT Fig. 5 RTD INPUT WIRING NOTE NOTE NOTE: NOTE NOTE 1) Don’t run input wires together with power cables. 2) Pay attention to the line resistance; a high line resistance may cause measurement errors. 3) When shielded cable is used, it should be grounded at one side only to avoid ground loop currents.
  • Page 8 B) Logic Input (for models with RS-485 only) B) Logic Input (for models with RS-485 only) B) Logic Input (for models with RS-485 only) B) Logic Input (for models with RS-485 only) B) Logic Input (for models with RS-485 only) This input is used for remote acknowledgement (reset).
  • Page 9 For all the outputs, the internal protection (varistor) assures a correct protection up to 0.5 A of inductive component. The same problem may occurs when a switch is used in series with the internal contacts as shown in Fig. 9.

  • Page 10: Power Supply

    7) Safety requirements for permanently connected equipment: Include a switch or circuit-breaker in the installation. Place the switch in close proximity to the equipment and within easy reach of the operator. Mark the switch as the disconnecting device for the equipment.

  • Page 11: Preliminary Hardware Settings

    PRELIMINARY HARDWARE PRELIMINARY HARDWARE PRELIMINARY HARDWARE PRELIMINARY HARDWARE PRELIMINARY HARDWARE S E T T I N G S S E T T I N G S S E T T I N G S S E T T I N G S S E T T I N G S 1) Remove the instrument from its case.

  • Page 12: Configuration Procedure

    CONFIGURATION PROCEDURE CONFIGURATION PROCEDURE CONFIGURATION PROCEDURE 1) Remove the instrument from its case. 2) Open switch V101 (See illustrations under “Preliminary Hardware Settings.”) 3) Re-insert the instrument in its case. 4) Switch on power to the instrument. The upper display will show COnF.
  • Page 13 r 1 r 1 r 1 =Input Type and Range Value =Input Type and Range Value =Input Type and Range Value =Input Type and Range Value =Input Type and Range Value 0 = TC J From -100 to 1000 °C 1 = TC K From -100 to...
  • Page 14 Hi. = High limit (for heating process) Lo. = Low limit (for cooling process) Hi.Lo = High and low limit (for special process) C2 = Rearming Mode C2 = Rearming Mode C2 = Rearming Mode C2 = Rearming Mode C2 = Rearming Mode O = Acknowledgements rearm (reset) the limiter (and restart the process) only if the condition which generated the shutdown status no longer exists...
  • Page 15 (Limiter (Limiter Hysteresis) threshold) Relay OUT 1 “Reset” LED Flash Upper display FLASH FLASH Steady A, B, C = Acknowledgment actions. NOTE: Acknowledgment B has no effect. Example 2 - C1 = Hi and C2 = 1 (Limiter (Limiter threshold) Hysteresis) Relay OUT 1 “Reset”...
  • Page 16 NOTE: 1) For band alarm, H.A./H.A.Ac/H.L. signifies outside band alarm, while L.A./ L.A.Ac/L.L. signifies inside band alarm. 2) The "Silence" function allows the manual reset of the alarm even if the alarm condition is still in progress. Non alarm status Example Example Example...
  • Page 17 P 4 = = = = = Alarm Standby (mask) Function Alarm Standby (mask) Function Alarm Standby (mask) Function Alarm Standby (mask) Function Alarm Standby (mask) Function (Skipped if option is not available or P1= none) OFF = Standby function disabled On = Standby function enabled If the alarm is programmed as band or deviation,...

  • Page 18: Operating Mode

    OPERATING MODE OPERATING MODE OPERATING MODE OPERATING MODE 1) Remove the instrument from its case. 2) Set switch V101 (see fig. 13) to the closed position. 3) Re-insert the instrument in its case. 4) Switch on the instrument. Normal Display Mode...

  • Page 19: Indicators

    I n d i c a t o r s I n d i c a t o r s I n d i c a t o r s I n d i c a t o r s I n d i c a t o r s “RESET“...

  • Page 20: Key Functions In Operative Parameter Display Mode

    (Skipped if n1 = 0 or 1) ON = the device is LOCKED. OFF = the device is UNLOCKED. When it is desired to switch from LOCK to UNLOCK condition, set a value equal to “n1” parameter. When it is desired to switch from UNLOCK to LOCK condition, set a value different from “n1”...

  • Page 21: Limiter Function

    Limiter function Limiter function Limiter function Limiter function Limiter function The relay of the output 1 operates in fail-safe mode (relay de-energized during shutdown condition) and latching mode. The OUT 1 turns OFF when: - The instrument is configured as a high limiter (C1 = Hi) and the measured value is greater than limiter threshold [“Su”...

  • Page 22: Alarm Functions

    Alarm functions Alarm functions Alarm functions Alarm functions Alarm functions (Skipped if option is not available or P1 = none) The alarm can be programmed as: - process alarm - band alarm - deviation alarm. Band and deviation alarms are referred to the limiter threshold and are possible only if an high limiter or a low limiter function has been selected.

  • Page 23: Error Messages

    ERROR MESSAGES ERROR MESSAGES ERROR MESSAGES ERROR MESSAGES ERROR MESSAGES Overrange, Underrange and Overrange, Underrange and Overrange, Underrange and Overrange, Underrange and Overrange, Underrange and Sensor Break Indications Sensor Break Indications Sensor Break Indications Sensor Break Indications Sensor Break Indications This device detects input fault conditions.

  • Page 24: General Specifications

    GENERAL SPECIFICATIONS GENERAL SPECIFICATIONS GENERAL SPECIFICATIONS GENERAL SPECIFICATIONS GENERAL SPECIFICATIONS Case Case: Polycarbonate grey case Case Case Case Self extinguishing degree Self extinguishing degree Self extinguishing degree: V-0 according to UL94. Self extinguishing degree Self extinguishing degree Front protection - designed and tested for IP 65 (*) Front protection Front protection Front protection...

  • Page 25: Linear Inputs

    INPUTS INPUTS INPUTS INPUTS INPUTS A) A) A) A) A) THERMOCOUPLE THERMOCOUPLE THERMOCOUPLE THERMOCOUPLE THERMOCOUPLE Type : Type : J, K, T, E, N, S, R, B, L, U, G(W), D(W3), Type : Type : Type : C(W5), Platinel II, °C/°F selectable. External resistance External resistance External resistance...
  • Page 26 STANDARD RANGES TABLE Input type Input type Input type Input type Input type impedance impedance impedance impedance impedance Accuracy Accuracy Accuracy Accuracy Accuracy 0 - 60 mV 0 - 60 mV 0 - 60 mV 0 - 60 mV 0 - 60 mV >...

  • Page 27: Serial Communication Interface

    Band alarm Band alarm Band alarm Band alarm Band alarm Operative mode Operative mode Operative mode: Inside or outside band Operative mode Operative mode programmable. Threshold Threshold Threshold Threshold Threshold: programmable from 0 to 500 units. Hysteresis Hysteresis Hysteresis Hysteresis Hysteresis : programmable from 0.1 % to 10.0 % of the readout span.

  • Page 28: Default Parameters

    APPENDIX A APPENDIX A APPENDIX A APPENDIX A APPENDIX A DEFAULT PARAMETERS DEFAULT PARAMETERS DEFAULT PARAMETERS DEFAULT PARAMETERS DEFAULT PARAMETERS DEFAULT PARAMETERS DEFAULT PARAMETERS DEFAULT PARAMETERS DEFAULT PARAMETERS DEFAULT PARAMETERS Loading Default Operating Parameters Loading Default Operating Parameters Loading Default Operating Parameters Loading Default Operating Parameters Loading Default Operating Parameters The control parameters can be loaded with...
  • Page 29 To load the default values proceed as follows: a ) Internal switch V101 must be open. b) The upper display will show: c) Press the key; the lower display will show the firmware version.
  • Page 30 PARA. Table 1 Table 2 European American nbUS nbUS 19200 19200 Type J Type J (-100 to 1000 °C) (-150 to 1830 °F) ----. ----. -100 -150 1000 1830 1 second 1 second Auto Auto 1 second 1 second nonE nonE H.A.

  • Page 31: Appendix B

    APPENDIX B APPENDIX B APPENDIX B APPENDIX B APPENDIX B THERMOCOUPLE COMPENSATING CABLE COLOR CODES. THERMOCOUPLE COMPENSATING CABLE COLOR CODES. THERMOCOUPLE COMPENSATING CABLE COLOR CODES. THERMOCOUPLE COMPENSATING CABLE COLOR CODES. THERMOCOUPLE COMPENSATING CABLE COLOR CODES. Thermocouple Thermocouple Thermocouple Thermocouple Thermocouple British British British...
  • Page 32 RETURN REQUESTS / INQUIRIES Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return package and on any correspondence.

  • Page 33: Data Acquisition

    Where Do I Find Everything I Need for Process Measurement Where Do I Find Everything I Need for Process Measurement Where Do I Find Everything I Need for Process Measurement Where Do I Find Everything I Need for Process Measurement Where Do I Find Everything I Need for Process Measurement and Control? OMEGA…Of Course! and Control? OMEGA…Of Course!

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Cn33271

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