MTL Safety Barrier Isolating Driver MTL4546

MTL Safety Barrier Isolating Driver MTL4546

MTL Safety Barrier Isolating Driver MTL4546

Descriptin

MTL4546/C/Y – MTL5546/Y ISOLATING DRIVER for 4–20mA HART® valve positioners with line fault detection

The MTLx546 accepts a 4/20mA floating signal from a safe-area controller to drive a current/pressure converter (or any other load up to 800Ω) in a hazardous area. For HART valve positioners, the module also permits bi-directional transmission of digital communication signals. Process controllers with a readback facility can detect open or short circuits in the field wiring: if these occur, the current taken into the terminals drops to a preset level. The MTL4546C and the MTLx546Y are very similar to the MTLx546 except that they provide open circuit detection only (i.e. no short-circuit detection).

MTL Safety Barrier Isolating Driver MTL4546

Specification

Number of channels

One 

Location of I/P converter 

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

Working range 

4 to 20mA 

Digital signal bandwidth 

500Hz to 10kHz 

Maximum load resistance 

800Ω (16V at 20mA) 

Minimum load resistance 

90Ω (short-circuit detection at < 50Ω) 

Output resistance 

> 1MΩ Under/over range capability 

Under range 

= 1mA Over range = 24mA (load ≤ 520Ω) 

Input and output circuit ripple 

< 40µA peak-to-peak 

Transfer accuracy at 20°C 

Better than 20µA 

Temperature drift 

< 1.0µA/°C

MTL Safety Barrier Isolating Driver MTL4546

MTL Safety Barrier Isolating Driver MTL4546

Ordering code

MTL4546 / MTL4546C / MTL4546Y

MTL5546 / MTL5546Y

MTL Safety Barrier Isolating Driver MTL4546