MTL Intrinsic Safety Barrier Binary Input Modules MTL4500 MTL5500 range

MTL Intrinsic Safety Barrier Binary Input Modules MTL4500 MTL5500 range

MTL Intrinsic Safety Barrier Binary Input Modules MTL4500 MTL5500 range

MTL Intrinsic Safety Barrier Binary Input Modules MTL4500 MTL5500 range

Application and function 

The binary input modules that are the subject of this manual are intrinsic safety isolators that enable a safe-area load to be controlled by a proximity detector or switch located in a hazardous area of a process plant. They are also designed and assessed according to IEC 61508 for use in safety instrumented systems up to SIL2 without hardware redundancy. Higher integrity for a Safety Instrumented Function (SIF) can be achieved by hardware duplication, for example by using the modules in a voting architecture. In addition to the transfer of the switch status, the detection and signalling of line faults is indicated by an LED on the top of the module and also provided through a separate relay output in some models. All of the modules are members of the MTL4500 and MTL5500 range of products

MTL Intrinsic Safety Barrier Binary Input Modules MTL4500 MTL5500 range

Variant Description 

Functionally the MTL4500 and MTL5500 range of modules are the same but differ in the following way: 

- the MTL4500 modules are designed for backplane mounted applications 

- the MTL5500 modules are designed for DIN-rail mounting. 

In both models the hazardous area field-wiring connections (terminals 1-3, and 4-6) are made through the removable blue connectors, but the safe area and power connections for the MTL45xx modules are made through the connector on the base, while the MTL55xx uses the removable grey connectors on the top and side of the module. 

Note that the safe-area connection terminal numbers differ between the backplane and DIN-rail mounting models. 

The binary input models covered by this manual are: 

MTL4504 single channel, switch/proximity detector interface, independent LFD 

MTL4511 and MTL5511 single channel, switch/proximity detector interface 

MTL4514/B and MTL5514 single channel, switch/proximity detector interface, independent LFD 

MTL4514N single channel, switch/proximity detector interface, LFD pass-through 

MTL4514D and MTL5514D single channel, switch/proximity detector interface, dual output 

MTL4516/C and MTL5516C dual channel, switch/proximity detector interface 

MTL4517 and MTL5517 dual channel, switch/proximity detector interface, independent LFD 

MTL Intrinsic Safety Barrier Binary Input Modules MTL4500 MTL5500 range

Hardware Safety Integrity

MTL Intrinsic Safety Barrier Binary Input Modules MTL4500 MTL5500 range

Code model

MTL4504 MTL4511 MTL5511 MTL4514 MTL5514 MTL4514D MTL5514D 

MTL4514B MTL4514N MTL4516 MTL4516C MTL54516C MTL4517 MTL5517