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Oldham MX 52 Installation Manual

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MX 52
Installation manual
MEASURING UNIT
Part Number: NP52IGB
Revision: B.0
The Fixed Gas Detection Experts

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Summary of Contents for Oldham MX 52

  • Page 1 MX 52 Installation manual MEASURING UNIT Part Number: NP52IGB Revision: B.0 The Fixed Gas Detection Experts...
  • Page 2 Copyright  April 2016 by Oldham S.A.S. All rights reserved. The reproduction of all or any section of this document in any form whatsoever without the written permission of Oldham S.A.S. is forbidden. The information contained in this manual is accurate to our knowledge.
  • Page 3 OLDHAM , even if it is involved in the sale of OLDHAM products. * OLDHAM cannot be held responsible for direct or indirect damage or be required to pay direct or indirect compensation resulting from the sale or use of any of its products IF THESE PRODUCTS HAVE NOT BEEN DEFINED AND CHOSEN BY OLDHAM FOR THEIR SPECIFIC USE.
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  • Page 5: Table Of Contents

    C O N T E N T S INSTALLATION AND CONNECTIONS ..............7 1.1. INSTALLATION : RECOMMENDATIONS ............7 1.2. ELECTRICAL CONNECTIONS FOR THE MX52 FACILITY (Fig.8) ....7 1.2.1. AC supply ........................ 7 1.2.2. DC supply ........................ 8 1.3. THE SENSORS (Fig. 9 – Fig. 12) ................8 1.3.1..
  • Page 6 5.2. METROLOGICAL SPECIFICATIONS ............... 23 5.3. CONNECTING DETECTORS OTHER THAN OLDHAM DETECTORS TO THE MX52 DEVICE .................... 24 5.3.1. Device transfer curves in 0% to 100% LEL configuration ............24 5.3.2. Device transfer curves in 0% to 30.0% OXYGEN configuration ..........25 5.3.3.

  • Page 7: Installation And Connections

    Please ensure you read the paragraph: Special Specifications for use in Potentially Explosive Atmospheres in Accordance with European Directive ATEX 94/9/EC 1.1. INSTALLATION : RECOMMENDATIONS The MX52 facility can be installed anywhere away from an explosive atmosphere. It should preferably be sited in a ventilated location under surveillance (guard post, control room, instrumentation room, etc.) Fixing is carried out in accordance with the dimensions of Figure 1 (4 fixing points).

  • Page 8: Dc Supply

    1.2.2. DC supply Voltage : 21 to 30 volts DC. The “minus” of the DC supply is earthed (and the earth is linked to the chassis). Maximum power : 240 W Maximum current in the cable : 12.5 A Cable = 2 x 2.5 mm2 or 2 x 4 mm2 depending on the length. Location of the terminal : Fig.8 ref : D page Protection : via 2 fuses located et the rear of the supply module (Fig 8 –...

  • Page 9: 3-Wire Detectors 4-20 Ma: 3 Connecting Wires For Shielded Cable

    1.3.2. 3-wire detectors 4-20 mA: 3 connecting wires for shielded cable Resistance of detector / unit cable: 16 ohms maximum per wire, i.e. 32 ohms in loop (1 km for cable 3 x 1.5 mm²). Connection on MX52 unit: see Fig. 10. 1.3.3.
  • Page 10 The current commercial designations are as follows: model 20/20 U - analog - type UV - 752002 (sensitive to UV radiation) model 20/20 UC - analog - type UV (sensitive to UV radiation) model 20/20 UB - µP technology - type UV - 772002 (sensitive to UV radiation) model 20/20 UBC - µP technology - type UV (sensitive to UV radiation) model 20/20 LC - analog - type UV/IR (pyroelectric, combination of UV and IR detectors)

  • Page 11: Co2 Detector Of Type "Ventostat Vt

    32 V DC and that supplies a standardized current (signal) of between 4 and 20 mA can be connected to the MX52 unit. The connection requirements are identical to those for the corresponding OLDHAM detectors (see Fig. 22). - 11 -...

  • Page 12: Parking Application

    1.3.9. Parking application CTX50 "Co parking" toxic gas detectors can be fitted in parallel when a mean gas concentration is to be obtained. The detectors must, imperatively, be located in the same area. In this case, a maximum of five detectors can be connected (see Fig. 23). 1.4.

  • Page 13: Ma Current Outputs (Fig. 12)

    1.4.2. 4-20 mA current outputs (Fig. 12) For each measuring channel, the MX52 unit is equipped with a 4-20 mA output that can be used to retransmit measurements to a recorder or an external PLC. The maximum resistance in loop mode is 600 ohms. The earth connections for the 4-20 mA outputs are common and the unit.

  • Page 14: Remote Acknowledgement

    RS 485 OUTPUT (PINABLE ON FIG 29) Several MX52 units can be linked to a single computer, which is the "master" of the network. In this case, a "SLAVE NUMBER" (by programming/unit) is asigned to each MX52 unit. This RS 485 output can be galvanically insulated as an option. case : no galvanic insulation no mounted insulation component 2 polarization electrical resistances are programmed and welded...

  • Page 15: Switching On

    ATTENTION The compliance of the complete electrical safety system is not OLDHAM’s responsibility The MX52 facility can be made live using trip switches* which are provided for this purpose and which protect the mains supply.

  • Page 16: Operating Modes

    2.3. OPERATING MODES 2.3.1. Buzzer During normal operation and whenever there is a fault or an alarm, the buzzer is triggered. The buzzer is stopped by pressing the CLEAR key or by clearing remotely. The buzzer emits a continuous or discontinuous sound (depending on how the facility is programmed) should an alarm threshold be exceeded.

  • Page 17: The Measurement Facility

    The alarm thresholds will be selected on the basis of the gases detected and of the corresponding standards in force. Special case : A channel connected to a fire sensor. the 100-division scale MUST be selected the alarm threshold MUST have 60 divisions (Because of the end-of-loop resistance of 2.7 kΩ, the fire sensor will deliver 4 mA when there is no fire and 20 mA should a fire de detected).
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  • Page 19: Use

    3.1. LIST AND FUNCTION OF THE VARIOUS “USER” ELEMENTS FOR PROGRAMMING AND CALIBRATING THE FACILITY 3.1.1. The keypad (see Fig.26 and 4) Equipped with 4 touch keys which can be accessed without opening and pivoting the FRONT panel for maintenance. CLEAR Ref.

  • Page 20: The Maintenance Keys

    “Audible and visual” or “audible” cancellation of an alarm. CLEAR To exit a current menu Initiate a self-test manually VALIDATION 3.1.2. The maintenance keys PROGRAMMING key (réf. B Fig. 26) can be accessed after opening and pivoting the front panel. Combined with the “-“...

  • Page 21: Scrapping Of Mx52

    Concerning the conservation, of the protection and the improvement of the quality of the environment, as well as for the protection of the health of the persons and the careful and rational use of natural resources, MX52 has to be the object of a selective collection for the electronic equipments and cannot be scrapped with the normal domestic waste.
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  • Page 23: Special Specifications For Use In Potentially Explosive Atmospheres In Accordance With European Directive Atex

    INERIS, the MX52 device, is classified as a safety device when used with OLDHAM CEX300 and OLC/OLCT 20, 40, 50 and 60 series detectors. The device may therefore contribute to limiting the risk of explosion as a consequence of the data it supplies to external units.

  • Page 24: Connecting Detectors Other Than Oldham Detectors To The Mx52 Device

    Where the user connects a brand of detector other than OLDHAM to the MX52 device, he must check carefully that the transfer curve is fully compatible with the device input characteristics, to ensure that the data generated by the detector is correctly interpreted.

  • Page 25: Device Transfer Curves In 0% To 30.0% Oxygen Configuration

    Where the user connects a brand of detector other than OLDHAM to the MX52 device, he must check carefully that the transfer curve is fully compatible with the device input characteristics, to ensure that the data generated by the detector is correctly interpreted.
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  • Page 29: Views Depicted In The Leaflet

    - 29 -...
  • Page 30 MX52 OVERALL DIMENSIONS FIGURE 1 - 30 -...
  • Page 31 Rear view of power module Power board Micro board Toroidal power transformer 8 "measuring line"boards with 2 channels each Board extractor grip Fluorescent display panel On/Off push-button Connector for an odd-numbered channel Keypad and operating functions Buzzer 2 measuring channels board FRONT interconnection board Adjusting potentiometer for an even-numbered channel MX52 INTERNAL COMPOSITION...
  • Page 32 Relay 24 V Power supply 24 V Rear view of power module Fuse 24 V Mains relays 110 V Mains socket (with internal fuses) item A Common relays Fuses 24 V Item B Common relays output Earth terminal POWER BOARD AND MODULE FIGURE 5 - 32 -...
  • Page 33 MICRO BOARD FIGURE 6 - 33 -...
  • Page 34 Outputs connector – Odd-numbered channel Output connector – Even-numbered channel AL1 and AL2 relays – Odd-numbered Signal fuse channel numbered detector Jumpers : opened or closed contacts Fuse odd-numbered line Potentiometers – Odd-numbered Jumpers : opened or closed contacts channel AL1 and AL2 relays –...
  • Page 35 24 VDC power terminal – Item D MX52 24 V 230 V 50/60 Hz 300 VA 115 V 50/60 Hz 300 VA Mains fuses – 230 V Item B 115 V Fuses – Item E Mains power socket – Earth terminal – Item A Item C FIGURE 8...
  • Page 36 (signal) Odd-numbered Odd-numbered (minus) channel detector (plus) Even-numbered Even-numbered channel detector REAR VIEW OF A MEASURING BOARD VUE ARRIERE D’UNE CARTE DE MESURE CONNECTIONS FOR DETECTOR CONNEXIONS POUR CAPTEUR Fig 9. FIGURE 9 - 36 -...
  • Page 37 MX52 board (signal) Odd-numbered (minus) channel "PONT" explosimetric detectors (plus) Even-numbered 3-wire 4-20 mV detectors channel EXAMPLE OF CONNECTION OF EXPLOSIMETRIC DETECTORS AND 3-WIRE 4-20 mA DETECTORS ON MX52 FIGURE 10 - 37 -...
  • Page 38 MX52 Board 2-wire 4-20 mV Odd-numbered detectors channel Detector 1 Detector 2 Ω en // R=2x3.9K Even-numbered channel Fire detectors (ionic or optical) Note : The 2.7 kΩ resistor is to be placed at the end of line (on the last detector = 3 maximum) Attention to the configuration of the measuring channel EXAMPLES OF CONNECTION OF 2-WIRE 4-20 mA DETECTORS...
  • Page 39 MX52 board Signal Detector Odd-numbered Minus channel Plus 4.20 mA current 4.20 mA output Contact REL AL1 Opened or closed contacts as desired Contact REL AL2 Signal Detector Even-numbered Minus channel Plus 4.20 mA current 4.20 mA output Contact REL AL1 Opened or closed contacts as desired Contact REL AL2...
  • Page 40 Connector on MX52 Explosive atmosphere measuring channel board Detector CTX/COX 100 Si barrier (clipper) Type MTL787S+ Terminal block (other detector) Explosive atmosphere Detector CTX/COX 100 Si barrier (clipper) Type Z787S/EX Terminal block (other detector) EXAMPLES OF CONNECTION OF DETECTORS WITH Si BARRIERS FIGURE 21 - 40 -...
  • Page 41 MX52 board Terminal (minus) 3-wire 4-20 mV detectors other than OLDHAM models block Terminal 2-wire 4-20 mV detectors other than OLDHAM models block FIGURE 22 4-20 mA DETECTORS OTHER THAN OLDHAM MODELS (Power-supplied by MX52 unit) - 41 -...
  • Page 42 MX52 board Detector TOX1 Detector TOX2 EXAMPLE OF "PARALLEL" WIRING OF 2 DETECTORS OF CTX 300 "Co parking" TYPE (5 maximum) FIGURE 23 - 42 -...
  • Page 43 MX52 Board Odd-numbered channel Siren Relay AL1 contact Relay AL2 contact Even-numbered Solenoid channel valve EXAMPLE OF CONNECTION OF EXTERNAL DEVICES TO THE ALARM 1 AND 2 RELAY CONTACTS OF A MEASURING CHANNEL FIGURE 24 - 43 -...
  • Page 44 MX52 Board Odd-numbered channel Recorder Even-numbered channel 4.20 mA current output EXAMPLE OF CONNECTION OF A RECORDER TO THE 4-20 OUTPUT OF A MEASURING CHANNEL FIGURE 25 - 44 -...
  • Page 45 Fluorescent display panel Channel 3 Channel 1 – Item E User keypad – Item D Fault On/Off button – Item A Channel 4 Programming key – Item B Channel 2 Option Buzzer strap Interrupteur Calibration key – Item C Buzzer On Buzzer Off MAIN OPERATING COMPONENTS FIGURE 26...
  • Page 46 Acquit à distance Remote ackowledge Sortie RS 485 RS485 output (1) shielded or not (l) blindée ou non CONNECTIONS TO THE CONNECTOR LOCATED BACK TO THE MX 52 : (on MICRO board) FIGURE 29 - 46 -...
  • Page 48 Thank you for reading this data sheet. For pricing or for further information, please contact us at our UK Office, using the details below. UK Office Keison Products, P.O. Box 2124, Chelmsford, Essex, CM1 3UP, England. Tel: +44 (0)330 088 0560 Fax: +44 (0)1245 808399 Email: sales@keison.co.uk...

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