MTL Safety Barrier MTL5544 Repeater Power Supply

MTL Safety Barrier MTL5544 Repeater Power Supply

MTL Safety Barrier MTL5544 Repeater Power Supply

MTL Safety Barrier MTL5544 Repeater Power Supply

Feature

The MTLx544 provides fully-floating dc supplies for energising two conventional 2-wire or 3-wire 4/20mA or HART transmitters located in a hazardous area, and repeats the current in other circuits to drive two safe-area loads. For smart transmitters, the unit allows bi-directional transmission of digital communication signals superimposed on the 4/20mA loop current. Alternatively, the MTLx544S acts as a current sink for a safe-area connection rather than driving a current into the load. Separately powered current sources, such as 4-wire transmitters, can be connected but will not support HART communication.

MTL Safety Barrier MTL5544 Repeater Power Supply

Specification

Number of channels

Two 

Location of transmitter 

Zone 0, IIC, T4–6 hazardous area if suitably certified Div. 1, Group A hazardous location 

Safe-area output 

Signal range: 4 to 20mA Under/over-range: 0 to 24mA Safe-area load resistance (MTLx 544) @ 24mA: 0 to 360Ω @ 20mA: 0 to 450Ω 

Safe-area load (MTLx544S) Current sink: 600Ω max. Maximum voltage source: 24V dc 

Safe-area circuit output resistance: 

> 1MΩ 

Safe-area circuit ripple 

< 50µA peak-to-peak 

Hazardous-area input 

Signal range: 0 to 24mA (including over-range) 

Transmitter voltage: 16.5V at 20mA 

Transfer accuracy at 20°C 

Better than 15µA 

Temperature drift < 0.8µA/°C 

Response time 

Settles to within 10% of final value within 50µs Communications supported 

HART (terminals 1 & 2 and 4 & 5 only)

MTL Safety Barrier MTL5544 Repeater Power Supply

MTL Safety Barrier MTL5544 Repeater Power Supply