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Gas Detection Equipment \ Gas Detection Systems \ MX 42A 4 Channel Display/Alarm unit

Product details

The MX 42A gas and flame measuring alarm control unit provide you with the perfect response to your need to ensure the safety of your equipment and personnel for work in environments which may contain explosive of toxic gases. It is connected to the corresponding detectors to efficiently solve your gas detection problems whether in industry, in boiler plants or in car parks. The MX 42A can be adapted for one to four separate channels to provide a customized detection system and extremely flexible programming. The MX 42A also complies with European directives. MX 42A: combining prevention, detection and action The MX 42A can be fitted with one detector per channel in the industrial version, and with CO or NOx detectors in the car park version. The detection capability, which is perfectly tailored to your requirements ensures highly effective prevention. The alarm is triggered as soon as the value measured on one of the channels exceeds the corresponding set points. The relay or relays activate the corresponding slave control systems. For the 3rd threshold, it is also possible to program alarms on the basis of mean values or in time delayed modes. A special car park software package manages differentials of low and high engine speeds.

Enhanced ergonomics and performances

• USER - FRIENDLY
  • Easy to adjust
  • Wall - mounted housing
  • Quick and easy to install
  • Power supply: 230 V AC or 115 V AC and 24 V DC (48 V DC on option)
• CLEAR MESSAGES
  • Clear LCD display unit
  • Display in cyclic mode or direct mode by keypad
  • Alarm status faults indicated by LEDs
• ERGONOMIC FRONT PANEL
• THREE ALARM LEVELS
  • 3 separate alarm levels per channel, programmed in the factory and adjustable by the user
  • Built - in relay system compatible with the control logic of fans and extractors, where applicable
• OPTIMAL EQUIPMENT
  • 2 separate relays per channel on 1st or 2nd threshold
  • Common relay in case of failure
  • Analogue output by measuring channel
• RELIABLE CONTROL UNIT
  • Protection against electromagnetic disturbance
  • Access to protected maintenance menu
  • Complete failure monitoring (detectors, control unit and line faults)
  • Managed by microprocessor

Technical Characteristics
Manufacturer	Oldham SA	Signal output	4 - 20mA per channel, load resistance 600 ohm max.
Function	Alarm and gas monitor	Power supply	115v AC (+6 % - 10%) 50/60Hz
Capacity	1 to 4 channels		230v AC (+6 % - 10%) 50/60Hz
Display	Clearly readable LCD		19 to 30v DC
Housing	Wall mounted polycarbonate IP 54		36 to 60v DC on option
Fault Alarms			Monitoring by indicator light on each channel
Default Alarms	Yellow LED		Max. power consumption: 85 v/A or 67W
	Constant monitoring of measuring line	Miscellaneous	Indication of channel displayed
	If you exceed 1/2 hour maintenance operating time		Keyboard for acknowledgement, display and maintenance
Gas alarms	3 independant thresholds		Operating temperature: -10C to +50C
	3 specific red indicator lights	Dimensions	295x340x107mm (high x long x deep)
	Rising or falling thresholds	Weight	5.480kg
	Automatic or manual clearing (on thresholds 1 and 2), automatic clearing on threshold 3	Compliance	CE, AFAQ, ISO9001
	3rd threshold instantaneous, based on mean value or time-delay (programmable as required)
Audible Alarms	Following failure sequence and measurement alarm
	Optional
Relays	2 independent relays per channel (programming) on 1st and 2nd threshold
	Common relay on threshold 3
	Common failure relay
	Positive safety on alarm
	Inhibition during maintenance function
Input Measurement	1 flammable, toxic gas or oxygen detector per channel
	Up to 5 CO detectors per channel (vehicle park version)
	Loop line resistance
	flammable 3 wire: 16 ohms (500m of cables, 1.5mm2)
	4-20mA, 2 wire: 32 ohm (1,000m of cables, 1.5 mm2)

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