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MTL 5500 Intrinsically Safe Isolators Resistance Isolator MTL5582B
MTL4582B - MTL5582B RESISTANCE ISOLATOR to repeat RTD signals
The MTLx582B connects to a 2-, 3-, or 4-wire resistance temperature device (RTD) or other resistance located in a hazardous area,isolates it and repeats the resistance to a monitoring system in the safe area. The module is intended typically (but not exclusively) for use with Pt100 3-wire RTDs. Switches enable selection of 2-, 3-, or 4-wire RTD connection. The MTLx582B should be considered as an alternative, non-configurable MTLx575, for use in RTD applications where a resistance input is preferred or needed instead of 4/20mA. The design is notable for its ease of use and repeatability. The number of wires which can be connected on the safe-area side of the unit is independent of the number of wires which can be connected on the hazardous-area side.
The module drives upscale in the case of open circuit detection.
MTL5582B product specification
SPECIFICATION
See also common specification
Number of channels One
Location of RTD
Zone 0, IIC, T4 hazardous area
Div. 1, Group A, hazardous location
Resistance source
2-, 3-, or 4-wire* RTDs to BS 1904/DIN 43760 (100Ω at 0°C)
*user selectable by switches (factory set for 3-wire)
Resistance range
10Ω to 400Ω
RTD excitation current
200μA nominal
Output configuration
2, 3 or 4 wires (independent of mode selected for hazardous area terminals)
10Ω to 400Ω (from a 100μA to 5mA source)
Temperature drift
±10mΩ/°C typical (0.01%/°C @ 100Ω)
Response time
To within 4% of final value within 1s
Safety drive on open-circuit sensor
Upscale to 420Ω nominal
Transfer accuracy@20°C
0.15Ω at excitation current 1 - 5mA
0.25Ω at excitation current 0.5 - 1mA
LED indicator
Green: power indication
Power requirements, Vs
33mA at 24V 35mA at 20V 28mA at 35V
Maximum power dissipation within unit
0.8W at 24V 1.0W at 35V
Safety description
Terminals 1 and 3
Uo = 1.2V Io = 4mA Po = 1.2mW Um = 253V rms or dc
Non-energy-storing apparatus ≤ 1.5V, ≤ 0.1A, ≤ 25mW
be connected without further certification into any IS loop with
an open circuit voltage 5V.
Terminals 1, 3, 4 and 5
Uo = 6.51V Io = 10mA Po = 17mW
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