Teledyne - Model MX 256 -Gas Detection - Digital Control Unit

The MX 256 has been developed to meet applications that need large capacity, flexibility, quality and ease of use. The MX 256 is a digital control unit for measuring gases present in the atmosphere.

Thanks to its digital technology, the MX 256 allows the connection of up to 256 detectors on all of its 8 channels, leading to a reduction in wiring costs.

• Digital control unit
• 8 measuring channels
• 256 detectors max.
• Very high flexibility
• Very economical RS485 bus cabling
• Tertiary applications, laboratory

With this option it is possible to add 4-20mA input modules in order to connect for example the CTX300, OLCT100 (See the list of compatible detectors below), relays, recording equipment, and access to data via the on-board web page.

The control unit and the different modules are easily programmable thanks to COM256 software.

In a wall mounted box, the MX 256 is compact and easy to install, it can detect explosive and toxic gases.

Thanks to its wired technology, the MX 256 can be adapted to all installations up to:

• 256 addressable relays,
• 224 logic inputs,
• 256 analog outputs,
• 256 digital sensors

Allow to connect 4 - 20 mA detector with the help of the HMI or industrial controler option.

Modules 4 or 8 relays

• Size: 125 mm x 165 mm x 60 mm
• Assembly: DIN rail snap-on
• Number of relays: 4 relays, 8 relays - Contact type: SPDT
• Nominal contact load: 2 A - 250Vac or 30Vdc on resistive load
• Connection: Screw terminals (cable: 1.5 mm2 maximum)
• Consumption: 3.5 mA in normal operation (max: 5.7 mA)
• Relay configuration for positive or negative safety by using mini-switches.
• 2 digital inputs are available on relay modules.

Logic input module

• Size: 125 mm x 165 mm x 60 mm
• Assembly: DIN rail snap-on
• Number of All or Nothing entries: 16
• Connection: Screw terminals (cable: 1.5 mm2 maximum)
• Consumption: 3.2 mA in normal operation (max: 5.5 mA)

Analog output module

• Size: 125 mm x 165 mm x 60 mm
• Assembly: DIN rail snap-on
• Number of analog outputs: 4
• Connection: Screw terminals (cable: 1.5 mm2 maximum)
• Consumption: 130 mA in normal operation (max: 256 mA)

MX256 Detection Control Panel

• Wall box: dimensions 320 x 180 x 95 mm
• Protection rating: IP 54
• Cable inputs/outputs
• 5 - M20 cable glands
• Diameter: 5 to 1
• 2 mm for power supply and local relays
• 9 grommets - diameter 5 to 7 mm

Conditions for use

• Ambient temperature: -10 à +40°C
• Storage temperature: -20 à +50°C
• Humidity: 5% to 95% without condensation
• Power supply:
• Voltage: 85 to 264 Vac -
• Current: 1.5 A (115 Vac) - 0.8 A (230 Vac)
• Internal battery backup: Optional, capacity 600 mA/H

Measurement channels

• Capacity: 8 channels with 32 modules
• Cable type: 2 pairs twisted screened RS485
• Module Power Supply: 12 to 30 Vdc delivered by the control unit
• Module digital network:
• RS485 Modbus
• addresses 1 to 32 selectable
• by mini-switches
• Insulation: 1500 V between power supply and digital network
• Display
• Backlit LCD
• 4 lines of 32 characters -
• 3 operating status LEDs:
• OK, Fault, Alarm
• Keyboard: 7 touch intuitive
• Built-in buzzer: Audible signal of alarms and faults

Alarms

• Number of alarms: 6 per sensor (Alarms 1 to 4, Out of Range - Fault)
• Programmable thresholds: On instantaneous or averaged values, by increasing or decreasing value, manual or automatic resetting
• 3 internal local relays:
• R1 (alarm/fault), R2 (alarm), R3 (alarm)
• Nominal contact load
• SPDT: 2 A/250 Vac-30 Vdc (resistive load)
• Digital Output: RS485 Modbus Protocol (connection with centralized supervision)

Approvals

• Low Voltage Directive: The device complies with the safety requirements of Directive 2014/35/EU , based on standard 61010-1 and its 2nd amendment
• Electromagnetic: EMC According to EN 50270

Teledyne - Gas Controllers and Gas Alarms