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MTL5575   SWITCH/ PROXIMITY DETECTOR INTERFACE

The MTLx511 enables a safe-area load to be controlled by a switch or proximity detector located in a hazardous-area. When selected, open or short circuit conditions in the field wiring are detected by the linefault-detect (LFD) facility and also indicated on the top of the module.
Phase reversal for the channel is selected by a switch on the side of the module and output is provided by changeover relay contacts.

Number of channels
One
Location of switches
Zone 0, IIC, T6 hazardous area
Div. 1, Group A hazardous location

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Essential details：MTL5575   SWITCH/ PROXIMITY DETECTOR INTERFACE

The MTLx511 enables a safe-area load to be controlled by a switch or proximity detector located in a hazardous-area. When selected, open or short circuit conditions in the field wiring are detected by the linefault-detect (LFD) facility and also indicated on the top of the module.
Phase reversal for the channel is selected by a switch on the side of the module and output is provided by changeover relay contacts.

Number of channels
One
Location of switches
Zone 0, IIC, T6 hazardous area
Div. 1, Group A hazardous location
Location of proximity detector
Zone 0, IIC, T4–6 hazardous area if suitably certified
Div. 1, Group A hazardous location
Hazardous-area inputs
Inputs conforming to BS EN60947–5–6:2001 standards for
proximity detectors (NAMUR)
Voltage applied to sensor
7 to 9V dc from 1kΩ ±10%
Input/output characteristics
Normal phase
Outputs closed if input > 2.1mA (< 2kΩ in input circuit)
Outputs open if input < 1.2mA (> 10kΩ in input circuit)
Hysteresis: 200µA (650Ω) nominal
Line fault detection (LFD) (when selected)
User-selectable via switches on the side of the unit. A line fault is
indicated by an LED. The channel output relay is de-energised if an
input line fault is detected.
Open-circuit alarm on if Iin < 50µA
Open-circuit alarm off if Iin > 250µA
Short-circuit alarm on if Rin < 100Ω
Short-circuit alarm off if Rin > 360Ω

MTL5553

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MTL5575   SWITCH/ PROXIMITY DETECTOR INTERFACE

This instruction manual describes the procedures for installing, connecting, checking and maintaining MTL5500 range of isolating interfaces and accessories. The MTL5500 products provide a DIN-rail mounted, intrinsically safe interface to hazardous areas of a process plant.
The individual sections of this manual cover the following topics
• Section 2 describes the range
• Section 3 specifies precautions both before and during installation
• Section 4 describes mounting accessories and the power adaptor
• Section 5 discusses the DX range of enclosures
• Section 6 provides relevant technical data
• Section 7 outlines fault-finding and maintenance procedures
• Section 8 describes bench test procedure
• Section 9 provides hazardous-area application information
• Section 10 provides MTL5000 products information
• Section 11 provides safety parameter information

MTL5500 range of isolators provide intrinsically safe (IS) communication and signal conditioning for a wide range of hazardous-area devices. Total AC and DC isolation exists between input, output and power supply on separately powered units, and between input and output on loop-powered units. No IS earth is required. DIN-rail mounting and plug-in signal and power connectors simplify installation and maintenance. Units are powered from a 20 to 35V DC supply, or, in some cases, from the signal itself.
Our latest generation of IS interfaces utilises an innovative “One-Core” technology to ensure the highest quality and availability while maintaining maximum flexibility at lowest cost.
Incorporating advanced circuit design, a common set of components and innovative isolating transformer construction, they achieve a significant reduction in power consumption while increasing channel packing densities. The compact, 16mm wide design reduces weight and gives exceptionally high packing density. They build on the proven success of the MTL2000, 3000, 4000 and 5000 ranges to bring the benefits of new developments in galvanic isolation without compromising the reliability of the designs from which they have evolved.
The backplane mounting MTL4500 range is designed with system vendors in mind for “projectfocussed” applications such as Distributed Control System (DCS), Emergency Shutdown Systems (ESD) and Fire and Gas monitoring (F&G).

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