Eaton MTLx544-S Series (MTL4544/S, MTL5544/S) Relay Power Supply

Natural gas processing plant: Flow transmitter signal transmission in Div. 1 area, utilizing SIL redundant configuration (multiple devices in parallel) to meet SIL 3 safety loop requirements;

Pharmaceutical industry: Power supply and signal isolation of liquid level transmitters in explosion-proof workshops to avoid power interference affecting the control accuracy of drug production processes.

Installation and Precautions

Wiring specifications: Wiring in hazardous areas must comply with the requirements of intrinsic safety circuits (such as using shielded twisted pair cables and single ended grounding of the shielding layer), and the corresponding terminals must strictly follow the manual (such as MTL4544 terminals 1-3 for channel 1 hazardous areas and 7-10 for safe area loads);

Power adaptation: The input power supply in the safe area should be stable at 20-35V DC to avoid voltage fluctuations that may cause device restarts or signal abnormalities;

HART communication: Only MTLx544 supports HART. It is necessary to ensure that the communication cable impedance matches (MTL recommended cable is recommended) to avoid digital signal attenuation;

Redundant configuration: If SIL 3 capability is required, multiple devices should be redundantly connected (HFT=1) and a functional safety assessment should be completed by referring to the MTL safety manual.