Millivolt Isolator | Part No. MTL 5081 | MEASUREMENT TECHNOLOGY

MTL5081 takes a low-level dc signal from a voltage source in a hazardous area, isolates it and passes it to a receiving instrument located in the safe area. The module is intended for use with thermocouples utilizing external cold junction compensation. A switch located on top of the module enables or disables the safety drive in the event of thermocouple burnout or cable breakage; a second switch permits the selection of upscale or downscale drive as required.

Number of channels: One

Signal source: Any dc millivolt source

Location of millivolt source: Zone 0, IIC, T4–T6 hazardous area if suitably certified Div 1, Group A, hazardous location

Input and output signal range: 0 to ±50mV, overrange to ±55mV

Output resistance: 60Ω nominal

Transfer accuracy: Linearity and repeatability <0.05% of reading or ±5µV, whichever is the greater

Temperature drift: ±(2µV + 0.002% of input) per °C

Response time: Settles to within 10% of final value within typically 150µs

Frequency response: DC to 4kHz

Safety drive on THC burnout: Two switches on top of the module enable or disable the safety drive and select upscale or downscale drive

LED indicator - Green: provided for power indication

Power requirement, Vs: 20mA max, 20 to 35V dc

Maximum power dissipation within unit: 0.5W at 24V, 0.7W at 35V

Isolation: 250V ac between safe circuits, hazardous circuits and power supply circuits

Safety description - Terminals 1 and 2: Non-energy-storing apparatus (≤1.2V, ≤0.1A, ≤20µJ and ≤25mW). Can be connected without further certification into any IS loop with an open circuit voltage <28V.

Martin Jaw Coupling Spider, One-Piece, Series: SUL, 225 Coupling, 1 in Length, 3/4 to 2-5/8 in ID, 5 in OD, Curved Jaw, 2268 in-lb Torque, 3600 rpm Maximum, 6 Bolts, For Use With: ML and MS Series Flexible Jaw Coupling, -30 to 275 deg F, Urethane

4.98" Outside diameter; Jaw Coupling; Spider; Urethane; 7/8" Thickness; ML225 | MS225 Size or Series; 3600 Max Speed

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