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Related Manuals for STATUS SCIENTIFIC CONTROLS MCU3
Summary of Contents for STATUS SCIENTIFIC CONTROLS MCU3
- Page 1 Environmental Monitoring & Control Units Types MCU 3 & 4 Installation and Hardware Configuration Manual Date: 11.6.2009. Issue: STATUS SCIENTIFIC CONTROLS LTD. Hermitage Lane Industrial Estate, Kings Mill Way, Mansfield, Nottinghamshire. NG18 5ER England : 01623 651381 : 01623 421063...
- Page 2 STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual The MCU3 & 4 Manuals The MCU3 & 4 Environmental Monitoring Systems have a range of manuals covering various aspects of their operation: • MCU3 & 4 Installation and Hardware Configuration Manual This manual covers all of the hardware aspects of the MCU Environmental Monitoring Systems.
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Page 3: Table Of Contents
FGDIO Intrinsically Safe Output Module Installation ..........3-9 3.3.3 Hazardous area installations using Proprietary Safety Barriers......3-11 Input Module Configuration ....................4-1 ....................4-1 NPUT ONFIGURATION 4.1.1 Status Scientific Controls Gas Detectors ..............4-2 4.1.2 Alternative Detector Heads ..................4-7 ................4-11 NALOGUE UTPUT ONFIGURATION 4.2.1 4-20mA Current Source .................. - Page 4 OUNTING ETAILS FOR ETECTOR EADS ‘L ’ T FGD D ........... 8-8 ETECTOR ALIBRATION ABLE Specifications ........................9-1 MCU3 & 4 C ................... 9-1 ONTROL NITS I.S. B FGDIO .................... 9-2 ARRIER FGD D ..............9-3 PECIFICATION FOR ETECTOR EADS 9.3.1...
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Page 5: Introduction
All on-site wiring to the system is via removable screw terminal connectors. A monitoring system consists of, as a minimum, an MCU3 Control Unit and 1 detector head. The MCU Control Unit houses all of the components required to implement a sophisticated and reliable monitoring system (battery back-up, alarm relays etc). - Page 6 • MCU3 Control Unit. The MCU3 can monitor up to eight channels. Channels 1-4 are located on a lower platform whilst channels 4-8 are located on a hinged upper level. This allows easy access to all hardware configurable options whilst maintaining its compact size.
- Page 7 MCU System Installation and Hardware Configuration Manual • MCU4 Control Unit The MCU4 contains two MCU3 systems giving the system the ability to monitor up to sixteen channels. The MCU4 is supplied with interchangeable gland plates located on its upper and lower face.
- Page 8 1-4 situated below. The microcontroller module and LCD display are not shown on the above diagram. These are mounted on the rear of the hinged front panel of the MCU3 and MCU4 Control units. TD06/001...
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Page 9: Microcontroller Module
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual Microcontroller Module Situated within the MCU Control Unit front panel is the Microcontroller Module. This module communicates with all Input Modules connected to the system via an I C serial bus. The... -
Page 10: Input Module
• 0-5V Voltage Output proportional to detected signal. Up to eight input modules can be located within an MCU3 Control Unit; up to sixteen can be located within an MCU4. Situated on each Input Module are 3 Double Pole Change-Over Relays, each relay having contacts rated at 5A (240V AC). -
Page 11: Distribution Board
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual Distribution Board The Distribution Board is the distribution point for power around the system. It allows the connection of external power supplies into the system and the use of external batteries for backup purposes. -
Page 12: Distribution Board - Issues 3 And Above
FS3 is intact. This supply is taken from the 24V supply of the system and is used by Status Scientific Controls when powering external equipment. The amount of power available from this connector must be determined for each installation based upon the system configuration. -
Page 13: Common Relay Module
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual Jumpers are located on the lower half of the distribution board. The jumpers allow the engineer to configure the outputs for either 24V switching or 0V switching at installation. A label appears on the PCB indicating the correct jumper settings for each option: Outputs Input –... -
Page 14: Power Supply Module
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual Power Supply Module INT/EXT Battery Mains Fuse 24V External O/P 230V 130100 Issue 2 The Power Supply is situated beneath the main chassis of the control unit and provides the power for the whole system. -
Page 15: Battery Backup
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual Battery Backup The MCU control units are supplied with a pair of 12V 1.2Ahr maintenance free backup batteries mounted beneath the main chassis (MCU4 contains 2 pairs of batteries). The batteries are connected in series enabling them to provide the 24V required by the system in the event of an external power failure. -
Page 16: Calculation Examples
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual 1.6.1 Calculation Examples Three examples follow demonstrating how the backup time may be calculated. Example 1 (Typical Configuration) A 4 channel system comprising of 3 toxic channels and 1 flammable channel. All system relays are configured as normally energised. -
Page 17: Calculating The Backup Time For Your System
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual Example 3 (Best Case) A 4 channel system comprising of 4 toxic channels. All system relays are configured as normally de-energised. No analogue outputs are being provided by the system. -
Page 18: Mcu System Communications
The PC can monitor more than one MCU system when utilising network cards. All PC’s have at least one RS232 COM port to allow communications with external equipment. The network cards supplied by Status Scientific Controls allow the PC to monitor a maximum of 32 MCU systems via one com port. -
Page 19: Mcu Installation
The MCU Control Units and FGD Gas Detectors are fully tested prior to delivery. However, after installation we strongly recommend that full system testing and commissioning be carried out. Status Scientific Controls Service personnel are best equipped to perform the relevant tests and commissioning and will be able to offer advice regarding installation faults. -
Page 20: Assembling
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual Assembling The MCU Control Units are supplied with the Standby Battery fuse (FS4) not fitted. This fuse should be fitted once the Control Unit is mounted in position and ready for use. It should be noted that once this fuse is fitted, power will be connected to all modules and Sensor Heads connected to the system. -
Page 21: Dc Connection
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual 2.4.1.1 Selecting Mains Input Voltage 1. Ensure AC mains supply is disconnected from the MCU Control Unit. 2. Rotate the screw located centrally on the yellow cover anti-clockwise until the cover is released. -
Page 22: Gas Detector Head Installation
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual ETECTOR NSTALLATION Siting the Detectors Mounting positions for the gas detectors need to be considered individually, Status Scientific Controls will offer advice and assistance with regard to the siting of detectors in varying environments. - Page 23 STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual Input Module Note: Distribution board Link J1 must be fitted. Screen 4-20mA Loop Connection diagram for FGD2/3 Oxygen or Earth Toxic Detector in a Non-Hazardous area The correct wiring method for all Status Scientific FGD2 / FGD3 Detector Heads (in a non- hazardous location) is shown above.
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Page 24: Installation In A Hazardous Areas
There are two methods by which safety barriers can be provided:- a). using an optional Status Scientific Controls barrier type FGDIO fitted integral to each output channel of the MCU unit. b). using externally mounted proprietary safety barriers of the correct type in series with each remote detector head. -
Page 25: Hazardous Area Installation Using Barrier Type Fgdio
MCU System Installation and Hardware Configuration Manual 3.3.1 Hazardous area installation using barrier type FGDIO A Status Scientific Controls barrier type FGDIO can be fitted to each output channel module within the MCU unit. The following diagrams show the connections between FGD Detector heads and an Input Module... - Page 26 STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual The I.S Earth connection on the power distribution PCB must be connected to the I.S. earth point for the installation. The connection must be made via a conductor of minimum 4mm cross sectional area.
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Page 27: Fgdio Intrinsically Safe Output Module Installation
If an existing MCU system requires the addition of an FGDIO barrier, a kit of parts can be purchased from Status Scientific Controls. This includes: Input Module Grey Protective Cover incorporating the FGDIO Barrier Fitting Hardware (i.e. - Page 28 STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual Note: RHS and LHS apply to modules located in even number channel positions. Where the input module is being installed in an odd number channel position these locations must be reversed.
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Page 29: Hazardous Area Installations Using Proprietary Safety Barriers
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual 3.3.3 Hazardous area installations using Proprietary Safety Barriers. The following diagrams show how proprietary I.S. barriers from alternative manufacturers can be used (barriers manufactured by MTL are shown). Hazardous area... - Page 30 STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual Note: The system 0V is NOT connected to the earth. Ensure J1 on the Distribution Board is not fitted. The I.S Earth connection on the power distribution PCB must be connected to the installations’...
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Page 31: Input Module Configuration
Section 4.1.1 discusses the most common configuration options. These are also the configurations adopted by Status Scientific for use with FGD detector heads (manufactured by Status Scientific Controls). Section 4.1.2 discusses less common configurations. These configurations allow alternative manufacturers detector heads to be used. -
Page 32: Status Scientific Controls Gas Detectors
MCU System Installation and Hardware Configuration Manual 4.1.1 Status Scientific Controls Gas Detectors Status Scientific Controls design and manufacture a variety of fixed gas detectors. The detector head used for monitoring oxygen or toxic gases (using conventional sensors) requires a 2-wire connection whilst detector heads incorporating infrared sensors or pellistors require a 3-wire connection. - Page 33 STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual 4.1.1.2 FGD2 and FGD3 Flammable Detector Heads The electronics for the head derives its power from the current loop. A separate supply is provided for the sensor due to the sensor requiring more than the 4-20mA loop...
- Page 34 STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual 4.1.1.3 FGD10B Infrared Current Sink The electronics for the head derives its power from the current loop. A separate supply is provided for the sensor due to the sensor requiring more than the 4-20mA loop current range.
- Page 35 STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual 4.1.1.4 FGD10B Infrared Current Source Variable voltage output Current sense circuit Terminals 4-20mA FGD10B Connection Procedure • Disconnect power from the system. • Remove the grey protective cover from the associated input module •...
- Page 36 STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual 4.1.1.5 FGD10A Infrared Current Source The FGD10A is a current source device, i.e. the 4 to 20 mA signal is derived from the detector. Variable voltage output Current sense circuit...
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Page 37: Alternative Detector Heads
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual 4.1.2 Alternative Detector Heads The MCU Control Units have been designed to accommodate detector heads built by other manufacturers; section 4.1.2 shows the relevant diagrams and procedures. 4.1.2.1 4-20mA Sink to Ground Using Internal PSU... - Page 38 STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual 4.1.2.2 4-20mA Sink to Ground Using External PSU 24V PSU Terminals Current Sensing Circuit 4-20mA Loop This configuration is similar to 4.1.2.1 except an external power supply is used to provide the loop current.
- Page 39 STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual 4.1.2.3 DC Voltage Input Terminals Voltage Sensing Circuit Voltage Output The Input Modules can be configured to accept signal levels in voltage form. SR1 and SR2 are used to scale the voltage to the appropriate level.
- Page 40 STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual Gland Plate Earth Stud 4.1.2.4 Pellistor Only Gas detectors Link to cable screen or Armour Terminals Screened/Armoured Cable Variable Compensator Voltage Output Signal Signal Gland Enclosure Sensing Detector Circuit If EARTH continuity is not maintained via gland (e.g.
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Page 41: Analogue Output Configuration
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual 3-Wire Connection – (4-20mA Current Input and Separate Supply) 4.1.2.5 Terminals Variable Voltage Voltage Output Input Current Sensing Circuit Current Output This configuration allows the connection of a detector head that provides a 4-20mA current output, and requires a separate power source, between 0-24V. -
Page 42: 4-20Ma Current Source
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual The analogue output options available are: 4.2.1 4-20mA Current Source The Input Module sources current proportional to the detected gas level. i.e. zero gas = 4mA full scale = 20mA Control The supply is taken from the internal PSU. -
Page 43: Input Module Installation
MCU System Installation and Hardware Configuration Manual Input Module Installation The MCU system supplied by Status Scientific Controls will normally be delivered correctly configured for the detector heads that have been purchased. If an existing MCU system requires the addition of a monitoring channel, a kit of parts can be purchased from Status Scientific Controls. -
Page 44: Detector Head Operation & Calibration
For details regarding FGD detector head specifications consult section 1. Detector Head Variants Status Scientific Controls manufacture detector heads for a wide variety of gases. The flexibility of the MCU systems has led to alternative heads being designed to monitor alternative parameters e.g. -
Page 45: Inspection And Maintenance
5.3.1 Calibration Intervals Status Scientific Controls advise that calibrations should be performed at no longer than six monthly intervals (this can be arranged with Status Scientific Controls as part of a maintenance contract). If a pellistor-based sensor is known to have been exposed to a poison (refer to section 5.5.1) it must at least be recalibrated. -
Page 46: Oxygen Gas Detectors
Pellistors will detect numerous flammable gases. The level at which they respond varies depending upon the flammable gas. Contact Status Scientific Controls for details regarding the cross sensitivity of flammable gases. 5.5.2 Oxygen Gas detectors At very high levels (i.e. -
Page 47: Sensor Disposal
0ppm Ethylene 100ppm 0ppm Contact Status Scientific Controls for further details regarding the cross-sensitivity of a particular sensor. Sensor Disposal All gas sensors should be disposed of according to local waste management requirements and environmental legislation. They should not be burnt since they may evolve toxic fumes. Status Scientific will accept sensors for disposal (by prior arrangement) contact Status Scientific Controls for further details. -
Page 48: Trouble Shooting
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual ROUBLE HOOTING The MCU system is supplied fully tested, and it is unlikely that any apparent faults are as a result of faulty hardware. Most problems encountered are as a result of installation faults or incorrect software/hardware configuration. -
Page 49: Service
MCU System Installation and Hardware Configuration Manual ERVICE Warranty The quality of design and manufacture included in all Status Scientific Controls Instruments ensure a long and trouble free life. In the unlikely event of a piece of our equipment failing within the first twelve months following delivery, Status Scientific will repair or replace any faulty parts, free of charge, providing that the equipment has not been misused. -
Page 50: Routine Servicing
It is recommended that the system be calibrated at least once every six months. This can be arranged with Status Scientific Controls as part of a maintenance contract. 7.4.1 Routine Inspection It is advisable to periodically inspect the MCU Control Unit Installation: •... -
Page 51: Appendix
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual PPENDIX Installation of Safe Area Sounders and Beacons MCU Control Units have three outputs that are intended for switching alarm sounders and/or beacons (the MCU4 has six outputs). These alarms take their power from the MCU system, whereas alarms triggered by the various relays are more suited to supply from external power sources. -
Page 52: Installation Of Intrinsically Safe Sounders And Beacons
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual Installation of Intrinsically Safe Sounders and Beacons SAFE AREA HAZARDOUS AREA Barrier Type 728+ Intrinsically Safe Beacon SS 327 I.S. Earth Distribution Board – Issue 3 Barrier Type 728+ Intrinsically Safe... -
Page 53: Example Of Connection To A Status Scientific Controls Traffic Light Unit
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual Example of Connection to a Status Scientific Controls Traffic Light Unit Traffic Light Unit MCU Control Panel Stock No. SS366 Relay 3 Relay 2 Relay 1 Relay 3 Relay 2... -
Page 54: Mounting Details For Mcu3 Control Unit
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual Mounting Details for MCU3 Control Unit Note: The front panels of the MCU Control Units open to allow access to the screw terminals situated inside. Sufficient space should be allowed around the mounting position so that this action is not restricted. -
Page 55: Mounting Details For Mcu4 Control Unit
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual Mounting Details for MCU4 Control Unit 500CRS Four mounting holes are provided each having a diameter of 11mm. Fixings Required: 4 off M10 Fasteners (Rawl Bolts or similar dependent on mounting wall construction) -
Page 56: Mounting Details For Fgd2 Detector Heads
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual Mounting Details for FGD2 Detector Heads The diagram below shows the mounting centres for the Status Scientific Controls FGD2 Detector Heads. Depth = 75mm approx. All dimensions are in ‘mm’ and are approximate only. -
Page 57: Mounting Details For Fgd3 Detector Heads
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual Mounting Details for FGD3 Detector Heads The diagram below shows the mounting centres for the Status Scientific Controls FGD3 Detector Heads. Depth = 75mm approx. All dimensions are in ‘mm’ and are approximate only. -
Page 58: Fgd Detector Head Calibration 'Look-Up' Table
Status Scientific Controls strongly advise that sensors providing zero and span factors that do not correspond to those listed as acceptable must not be used. A new sensor MUST be fitted in the detector to allow continued accurate and reliable readings to be made (refer to section 7.3 for... -
Page 59: Specifications
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual PECIFICATIONS MCU3 & 4 Control Units Note: MCU1 and MCU2 now obsolete. MCU3 MCU4 Size (nominal) ‘mm’ 475 x 300 x 208 475 x 538 x 208 Weight (approx) 16Kg... -
Page 60: Barrier Type Fgdio
STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual MCU3 MCU4 Power Supply Fuse 1 (Mains Input) T1.0A T1.0A Fuse 2 (Internal 24V) Fuse 3 (Com. Outputs) Fuse 4 (Battery fuse) Batteries 2 x 12V 1.2AHr 2 x 12V 1.2AHr Sealed Lead Acid Battery Type: YUASA NP1.2-12... - Page 61 STATUS SCIENTIFIC CONTROLS MCU System Installation and Hardware Configuration Manual Specification for FGD Detector Heads 9.3.1 FGD Flammable Heads Operating voltage 7-30vDC (for 4-20mA Signal) 4-7.5V (for sensor supply) Temperature -20 - +40C Humidity range 0-95% RH non-condensing Ambient + or – 10%...
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