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Model IRMA Intelligent RTD Module with Analog Output
Brand: Red Lion ControlsThe IRMA accepts a 2, 3, or 4-Wire RTD or resistance input and converts it into a 4-20 mA current output.
The 4 to 20 mA output is linearly proportional to the temperature or the resistance input. This output is ideal for interfacing to indicators, chart recorders, controllers, or other instrumentation equipment.
The IRMA is loop-powered which means that the same two wires are carrying both the power and the output signal.
The unit controls the output current draw from 4-20 mA in direct proportion to the input while consuming less than 4 mA for operation.
The conversion to a current output signal makes the IRMA less susceptible to noise interference and allows accurate transmission over long distances.
Two-way isolation allows the use of grounded RTD’s which can provide additional noise reduction benefits.
Features- User programmable input (RTD alpha = 0.00385 (DIN 43760), alpha = 0.00392, or resistance)
- 12-42 Vdc loop-powered (4-20 mA output)
- Microprocessor controlled
- Simple adjustable range setting (using input signal)
- RTD break detection
- Mounts on "T" and "G" style DIN rails
- 2-Way electrical isolation (input/output and power)
- High-density packaging (22.5 mm wide)
- Wide operating temperature range
Specifications
Brand
Accuracy
- ± [0.075 % Range + 0.1° C (0.18° F) Conformity] at 23° C (73.4° F) after 20 minutes Warm-Up, Conforming to ITS-90
Approvals & Certifications
- CE
- EMC Emissions: EN 50081-2, Immunity: EN 50082-2: EN 61000-4-2, 3, 4, 6, 8
- IEC 61010-1, EN 61010-1
Current
- Sensor Brake Detection: Upscale to 22.5 mA
- Sensor Break Detection: Downscale to 3.6 mA
Electrical Connectors
- Compression Typical Terminal Block
Enclosure, Body Material
- Plastic
Humidity
- < 85 % RH, Non-Condensing
Mounting
- Standard DIN Style Mounting Rails, Including Top Hat Profile Rail According to EN 50 022 - 35 x 7.5 & 35 x 15, & G Profile Rail According to EN 50035-G32
Operating Temperature
- -25° to 75° C (-13° to 167° F)
Operating Voltages
- 50 Vac from Input to Output
Output
- 4-20 mA Linear Output with Temperature or Resistance Input
Power
- 12-42 Vdc (Loop-Powered), 30 mA min. Capacity
Resolution
- 12-bits
Response Time
- 400 ms (To within 99 % of Final Value with Step Input, Typically, Response is Limited to Response Time of Probe)
RTD Type
- 2, 3, or 4-Wire, Pt100, Alpha = 0.00385 (DIN 43760), Alpha = 0.00392, or Resistance [Selectable Via DIP Switch]
Shock
- 30 G, 11 ms in 3 Directions According to IEC 68-2-27
Storage Temperature
- -40° to 85° C (-40° to 185° F)
Switch Type
- DIP Switches
Temperature Coefficient
- ± 0.01 % of Input Range/°C
Vibration
- 2 G, 5 to 150 Hz in X, Y, Z Direction for 1.5 Hours According to IEC 68-2-6
Voltage
- Dielectric Withstand Voltage: 1,500 Vac for 1 Minute
- Ripple: < 15 mV Peak-to-Peak, Max.