100% Brand New MTL 4549C Analogue Output Modules With Good price In Stock

Application and function of MTL 4549C

The MTL454x and MTL554x are isolator modules which enable an analogue 4-20mA control signal to be passed to a device located in a hazardous area from a safe area. The output current available to the hazardous

area is limited to comply with the requirements of the process explosion hazard. The modules are also designed and assessed according to IEC 61508 for use in safety instrumented systems up to SIL2 when the required function is to repeat the loop current within ±2%, and the safe state of the output is <3.6mA (downscale). Higher integrity levels for a SIF can be achieved by using the modules in a voting architecture.

For "smart" valve positioners using the HART protocol the units allow bi-directional communications superimposed on the 4-20mA signal current.

There are no configuration switches or operator controls to be set on the modules – they perform a fixed function related to the model selected. The MTLx546 models are single channel while the MTLx549 models are dual channel, although both channels must not be used in the same safety instrumented function. These modules are members of the MTL4500 and MTL5500 range of products.

Variant Description of MTL 4549C

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 1-2, and 4-5) are made through the

removable blue connectors on the top of the modules, but the safe area and power connections for the MTL454x

modules are made through the connector on the base, while the MTL554x 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 analogue output models covered by this manual are:

MTL4545Y single channel, open cct LFD

MTL4546 and MTL5546 single channel, open and short cct LFD

MTL4546C, MTL4546Y, and MTL5546Y single channel, open cct LFD

MTL4549, and MTL5549 dual channel, open and short cct LFD

MTL4549C, MTL4549Y, and MTL5549Y dual channel, open cct LFD 

Related products:

MTL4501-SR     1-ch safety input SIL3

MTL4504           1-ch DI relay output + N.E. LFD alarm

MTL4510           4-ch digital input

MTL4510B         4-ch multifunction dig input

MTL4511           1-ch DI c/o relay output + LFD 

MTL4513           2-ch DI solid state output + LFD 

MTL4514           1-ch DI relay output + LFD alarm

MTL4514B        1-ch DI relay output + LFD alarm

MTL4514D        1-ch DI relay output with repeat

MTL4514N        1 ch DI Resistance output + LFD

MTL4516            2-ch DI relay output + LFD 

MTL4516C         2-ch DI c/o relay output + LFD 

MTL4517           2-ch DI relay output + LFD alarm

MTL4521           loop powered solenoid driver 25V 147mA

MTL4521L         loop powered solenoid driver 25V 108mA

MTL4523           solenoid driver + LFD 25V 147mA 

MTL4523R         solenoid driver + rev LFD 25V 147mA

MTL4523L          loop powered solenoid driver + LFD 25V 147mA

MTL4523V        solenoid driver,voltage control + LFD 25V 147mA

MTL4523VL       solenoid driver,voltage control + LFD 25V 108mA

MTL4524          solenoid driver, switch contr + OVR 25V 147mA

MTL4524S       solenoid driver, switch contr + OVR 25V 147mA

MTL4525         solenoid driver, switch contr + OVR 25V 83.3mA

MTL4526        2-ch loop powered/switched IS relay

MTL4531       -ch vibration transducer interface

MTL4532       1-ch pulse isolator, converter with trip

MTL4541      1-ch smart transmitter repeater 4-20mA

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