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© 2016 Eaton All Rights Reserved Publication No. Eaton Electric Limited, Great Marlings, Butterfield, Luton Beds, LU2 8DL, UK. Tel: + 44 (0)1582 723633 Fax: + 44 (0)1582 422283 E-mail: mtlenquiry@eaton.com www.mtl-inst.com EUROPE (EMEA): +44 (0)1582 723633 mtlenquiry@eaton.com THE AMERICAS: +1 800 835 7075 mtl-us-info@eaton.com ASIA-PACIFIC: +65 6 645 9888 sales.mtlsing@eaton.com The given data is only intended as a product description and should not be regarded as a legal warranty of properties or guarantee. In the interest of further technical developments, we reserve the right to make design changes. MTL4541/S – MTL5541/S REPEATER POWER SUPPL Y 4/20mA, HART®, 2- or 3-wire transmitters The MTLx541 provides a fully-floating dc supply for energising a conventional 2- or 3-wire 4/20mA transmitter, which is located in a hazardous area, and repeats the current in another floating circuit to drive a safe-area load. For HART 2-wire transmitters, the unit allows bi-directional communications signals superimposed on the 4/20mA loop current. Alternatively, the MTLx541S 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. SPECIFICATION See also common specification Number of channels One 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 t o 20mA Under/over-range: 0 t o 24mA Safe-area load resistance (MTLx541) @ 2 4mA: 0 t o 360Ω @ 2 0mA: 0 t o 450Ω Safe-area load (MTLx541S) C urrent sink: 00Ω max. M aximum voltage source: 4V dc Safe-area circuit output resistance: > 1 MΩ Safe-area circuit ripple < 50µA peak-to-peak Hazardous-area input Signal range: 0 t o 24mA (including over-range) Transmitter voltage: 6.5V 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) LED indicator Green: power indication Maximum current consumption (with 20mA signal) 51mA at 24V Power dissipation within unit (with 20mA signal) MTLx541 .7W @ 24V dc MTLx541S .0W @ 24V dc Safety description Terminals 2 to 1 and 3: Uo=28V Io=93mA Po=651mW Um = 253V rms or dc Terminals 1 to 3: Simple apparatus ≤1.5V, ≤0.1A and ≤25mW; can be connected without further certification into any IS loop with an open-circuit voltage <28V SIL capable These models have been assessed for use in IEC 61508 functional safety applications. SIL2 capable for a single device (HFT=0) SIL3 capable for multiple devices in safety redundant configurations (HFT=1) See data on MTL web site and refer to the safety manual. MTL4541 / MTL4541S Hazardous area Safe area 4/20mA MTL4541 MTL4541S Vs– Vs+ 20 to 35V dc 4/20mA Load Load Com Tx+ Input I I 13 14 MTL5541 / MTL5541S Hazardous area Safe area Vs– Vs+ 20 to 35V dc 4/20mA MTL5541 MTL5541S 4/20mA Load+ Load Com Tx+ Input I I EPSx541/S Rev6 010916 FSM FUNCTIONAL SAFETY MANAGEMENT IEC 61508:2010 SIL IEC 61508:2010 SIL IEC 61508:2010