The MTL5541 Isolation Barrier with Repeater Power Supply provides a fully-floating dc supply for energizing a conventional 2- or 3-wire 4/20 mA transmitter which is located in a hazardous area, and repeats the current in another floating circuit to drive a safe-area load. For smart 2-wire transmitters, the unit allows bi-directional communications signals superimposed on the 4/20 mA signal.
MTL5541 Isolation Barrier with Repeater Power Supply Specification
Number of channels: One
Location of transmitter: Zone 0, IIC, T4–6 hazardous area if suitably certified
Div. 1, Group A hazardous location
Signal range: 4 to 20 mA
Under/over-range: 0 to 24 mA
Safe-area load resistance: 0 to 360Ω @ 24 mA and 0 to 450Ω @ 20 mA
Safe-area circuit output resistance: > 1 MΩ
Safe-area circuit ripple
< 50μA peak-to-peak
Signal range: 0 to 24 mA (including over-range)
MTL5500 Series IS Interface Units
The MTL5500 series Isolation Barrier with Repeater is the latest generation of MTL isolators. Incorporating advanced circuit design and innovative isolating transformer construction. The compact 16 mm wide design reduces weight and gives a high packing density and reduction in power consumption. They build on the success of the MTL5000 series to bring the benefits of galvanic isolation with exceptional design and reliability, II (I) GD (Ex ia) IIC,IECEx, ATEX (Baseefa) FM, CSA.
High Packing density
Low power dissipation
Multi-channel I/O modules
Compatible with preceding MTL5000 series
Assessed for Functional safety IEC61508 applications
Required EX numbers and information displayed on cover where applicable
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 only)
Green: power indication
Maximum current consumption (with 20mA signal): 51mA at 24V
Power dissipation within unit (with 20mA signal): 0.7W at 24V
Terminals 2 to 1 and 3:
Vo=28 V Io=93 mA Po=651 mW Um = 253 V rms or dc
Terminals 1 to 3:
Simple apparatus ≤1.5 V, ≤0.1 A and ≤25m W; can be connected
without further certification into any IS loop with an open-circuit
voltage <28 V
The MTL5541 1 ch 2 Wire Transmitter Repeaters are versatile yet simple to apply; use the latest technology and yet are well proven.
MTL Isolation Barrier with Repeater Technology
These contrasting attributes stem from the progression of MTL’s 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 (back-plane mounting) isolators share a common design, differing only in the mechanical mounting and connection methods.
• Compact modular design with DIN rail mounting
• High packing density
• Single and multi-channel I/O modules
• 3-port isolation with low power dissipation
• Compatible with MTL5000
Source: MTL Co.
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