MTL Intrinsic Safety

            MTL is a world leader in products designed for use in hazardous areas where there is a probability of explosive atmospheres.
Our products range from industry renowned (IS) barriers and isolators through to sophisticated process control products, all designed for the harsh environments often encountered in the process industry.
As part of our 'Customer Commitment' process, we regularly produce educational reference material to assist users in understanding the latest EU regulations and directives.

Intrinsically Safe Isolators

We offer the best choice in DIN-rail and backplane mounting isolators to meet the requirements of modern systems. The DIN-rail mounting isolator ranges provide a wide choice of functions with high accuracy and reliability, while the backplane mounting products are established as the leading IS system interface with solutions for all the major DCS companies.The MTL4500 range is the latest generation of backplane mounting products, building upon the heritage of MTL4000 and introducing many key application benefits.
The MTL5500 range launches a new industry standard for DIN rail mounting products, ideally suited to a wide variety of interface tasks for process instrumentation.
The MTL5500 range modules are versatile yet simple to apply; use the latest technology and yet are well proven.

These contrasting attributes stem from the progression of our expertise in the design and manufacture of isolators for intrinsic safety and the application of innovative technology to achieve the required separation and segregation of the circuits.
The MTL5500 (DIN-rail mounting) and MTL4500 (backplane mounting) isolators share a common design, differing only in the mechanical mounting and connection methods.

                                            
MTL5501-SR 1ch DI failsafe solid-state output + LFD alarm
MTL4501-SR – MTL5501-SR FAIL-SAFE SWITCH/PROXIMITYDETECTOR INTERFACE with LFD
With the MTLx501-SR, a fail-safe switch/proximity detector located in the hazardous area can control an isolated fail-safe electronic output. The MTLx501-SR also provides relay alarm contacts to signal line-fault conditions. The MTLx501-SR is for use with approved fail-safe sensors in loops that require operation up to SIL3 according to the functional safety standard IEC 61508.

MTL 5501-SR Product SPECIFICATION
See also common specification
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 location Div 1, Group A, hazardous location
Voltage applied to sensor
8.6V dc max from 1kΩ
Input/output characteristics
Fail-safe electronic output
Output on: 24V nominal
Output off: 0V dc, max < 5V dc
Load: 750Ω to 10kΩ
Maximum on-state current: 25mA (at 750Ω)
Short-circuit current: 30mA
 Line fault detection (LFD)
 LFD relay output: contacts open when line fault detected Switch characteristics: 0.3A 110V ac/dc; 1A 35V dc; 30W/33VA
 LED indicators
Green: power indication
Yellow: channel status, on when fail-safe output energised
 Red: LFD indication, flashing when line fault detected