SCM7B34/34N - Isolated Linearized 2- Or 3-Wire RTD Input Modules

Main features

  • Interfaces to 100 Ohm Platinum or 120 Ohm Nickel RTDS
  • Provides 250µA RTD Excitation Current
  • Linearizes RTD Signal Response
  • Provides High-Level Voltage Outputs
  • 1500Vrms Transformer Isolation
  •  Accuracy, ±0.05% to ±0.15% of Span Typical
  • Nonconformity, ±0.025% to ±0.07% of Span Typical
  • ANSI/IEEE C37.90.1 Transient Protection
  • Input Protected to 120Vrms Continuous
  • Noise, 500µV Peak (5MHz), 300µV RMS (100kHz)
  • CMRR, up to 160dB
  • NMR, up to 85dB
  • Easy DIN Rail Mounting
  • CSA Certified, FM Approved
  • CE and ATEX Compliant
Clear
Price request Datasheet

Each SCM7B34/34N RTD input module accepts a single channel of 100 ohm Platinum (a = 0.00385) or 120 ohm Nickel (a = 0.00672) RTD input and produces an input voltage in response to a low-level current excitation. The input signal is filtered, isolated, amplified, linearized, and converted to a high-level analog voltage for output to the process control system.

These modules incorporate a five-pole filtering approach to maximize both time and frequency response by taking advantage of both Thomson (Bessel) and Butterworth characteristics. One pole of the filter is on the field side of the isolation barrier; four are on the process control system side.

In response to the low-level current excitation signal, the RTD input signal is chopped by a proprietary chopper circuit and transferred across the transformer isolation barrier, suppressing transmission of common mode spikes and surges. The signal is then reconstructed and filtered for process control system output.

Linearization is achieved by creating a non-linear transfer function through the module itself. This non-linear transfer function is configured at the factory and is designed to be equal and opposite to the specific RTD non-linearity. Lead compensation is achieved by matching two current paths thus cancelling the effects of lead resistance.

Modules accept a wide 14 – 35VDC power supply range (+24VDC nominal). Their compact packages (2.13″x1.705″x0.605″ max) save space and are ideal for high channel density applications. They are designed for easy DIN rail mounting using any of the “-DIN” backpanels.

re ideal for high channel density applications. They are designed for easy DIN rail mounting using any of the “-DIN” backpanels.

SCM7B34-01 - RTD Type 100 Ohm Input range -100 to 100 (°C) Output range +1 to +5 V

7B

SCM7B34-01A - RTD Type 100 Ohm Input range -100 to 100 (°C) Output range 0 to +5 V

7B

SCM7B34-01D - RTD Type 100 Ohm Input range -100 to 100 (°C) Output range 0 to +10 V

7B

SCM7B34-02 - RTD Type 100 Ohm Input range 0 to 100 (°C) Output range +1 to +5 V

7B

SCM7B34-02A - RTD Type 100 Ohm Input range 0 to 100 (°C) Output range 0 to +5 V

7B

SCM7B34-02D - RTD Type 100 Ohm Input range 0 to 100 (°C) Output range 0 to +10 V

7B

SCM7B34-03 - RTD Type 100 Ohm Input range 0 to 200 (°C) Output range +1 to +5 V

7B

SCM7B34-03A - RTD Type 100 Ohm Input range 0 to 200 (°C) Output range 0 to +5 V

7B

SCM7B34-03D - RTD Type 100 Ohm Input range 0 to 200 (°C) Output range 0 to +10 V

7B

SCM7B34-04 - RTD Type 100 Ohm Input range 0 to 600 (°C) Output range +1 to +5 V

7B

SCM7B34-04A - RTD Type 100 Ohm Input range 0 to 600 (°C) Output range 0 to +5 V

7B

SCM7B34-04D - RTD Type 100 Ohm Input range 0 to 600 (°C) Output range 0 to +10 V

7B

SCM7B34-05 - RTD Type 100 Ohm Input range -50 to 350 (°C) Output range +1 to +5 V

7B

SCM7B34-05A - RTD Type 100 Ohm Input range -50 to 350 (°C) Output range 0 to +5 V

7B

SCM7B34-05D - RTD Type 100 Ohm Input range -50 to 350 (°C) Output range 0 to +10 V

7B

SCM7B34N-01 - RTD Type 120 Ohm Nickel Input range 0 to 300 (°C) Output range +1 to +5 V

7B

SCM7B34N-01A - RTD Type 120 Ohm Nickel Input range 0 to 300 (°C) Output range 0 to +5 V

7B

SCM7B34N-01D - RTD Type 120 Ohm Nickel Input range 0 to 300 (°C) Output range 0 to +10 V

7B

SCM7B34N-02 - RTD Type 120 Ohm Nickel Input range 0 to 200 (°C) Output range +1 to +5 V

7B

SCM7B34N-02A - RTD Type 120 Ohm Nickel Input range 0 to 200 (°C) Output range 0 to +5 V

7B

SCM7B34N-02D - RTD Type 120 Ohm Nickel Input range 0 to 200 (°C) Output range 0 to +10 V

7B

SCM7B34/34NIsolated Linearized 2- Or 3-Wire RTD Input Modules
SCM7B34-01RTD Type 100 Ohm Input range -100 to 100 (°C) Output range +1 to +5 V
SCM7B34-01ARTD Type 100 Ohm Input range -100 to 100 (°C) Output range 0 to +5 V
SCM7B34-01DRTD Type 100 Ohm Input range -100 to 100 (°C) Output range 0 to +10 V
SCM7B34-02RTD Type 100 Ohm Input range 0 to 100 (°C) Output range +1 to +5 V
SCM7B34-02ARTD Type 100 Ohm Input range 0 to 100 (°C) Output range 0 to +5 V
SCM7B34-02DRTD Type 100 Ohm Input range 0 to 100 (°C) Output range 0 to +10 V
SCM7B34-03RTD Type 100 Ohm Input range 0 to 200 (°C) Output range +1 to +5 V
SCM7B34-03ARTD Type 100 Ohm Input range 0 to 200 (°C) Output range 0 to +5 V
SCM7B34-03DRTD Type 100 Ohm Input range 0 to 200 (°C) Output range 0 to +10 V
SCM7B34-04RTD Type 100 Ohm Input range 0 to 600 (°C) Output range +1 to +5 V
SCM7B34-04ARTD Type 100 Ohm Input range 0 to 600 (°C) Output range 0 to +5 V
SCM7B34-04DRTD Type 100 Ohm Input range 0 to 600 (°C) Output range 0 to +10 V
SCM7B34-05RTD Type 100 Ohm Input range -50 to 350 (°C) Output range +1 to +5 V
SCM7B34-05ARTD Type 100 Ohm Input range -50 to 350 (°C) Output range 0 to +5 V
SCM7B34-05DRTD Type 100 Ohm Input range -50 to 350 (°C) Output range 0 to +10 V
SCM7B34N-01RTD Type 120 Ohm Nickel Input range 0 to 300 (°C) Output range +1 to +5 V
SCM7B34N-01ARTD Type 120 Ohm Nickel Input range 0 to 300 (°C) Output range 0 to +5 V
SCM7B34N-01DRTD Type 120 Ohm Nickel Input range 0 to 300 (°C) Output range 0 to +10 V
SCM7B34N-02RTD Type 120 Ohm Nickel Input range 0 to 200 (°C) Output range +1 to +5 V
SCM7B34N-02ARTD Type 120 Ohm Nickel Input range 0 to 200 (°C) Output range 0 to +5 V
SCM7B34N-02DRTD Type 120 Ohm Nickel Input range 0 to 200 (°C) Output range 0 to +10 V

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SCM7BP08 - Eight channel backpanel with standoffs for mounting. SCM7BP08 -
Eight channel backpanel with standoffs for mounting.

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SCM7BP16 - Sixteen channel backpanel with standoffs for mounting. SCM7BP16 -
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SCM7BXCA01 - DB25 to 26 pin adapter cable SCM7BXCA01 -
DB25 to 26 pin adapter cable

The SCM7BXCA01 is DB25 to 26 pin adapter cable

SCM7BXCA02 - DB25 to DB25 adapter cable SCM7BXCA02 -
DB25 to DB25 adapter cable

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SCM7BXEV - 1 channel evaluation backpanel SCM7BXEV -
1 channel evaluation backpanel

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SCM7BXR1 - 250 Ohm current conversion resistor SCM7BXR1 -
250 Ohm current conversion resistor

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SCMXBE - DIN rail base element without snap foot SCMXBE -
DIN rail base element without snap foot

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SCMXBEFE - DIN rail base element with snap foot SCMXBEFE -
DIN rail base element with snap foot

The SCMXBEFE is DIN rail base element with snap foot

SCMXCA006 - Interface cables SCMXCA006 -
Interface cables

System interface cable for the 8BP04/08/16 backpanels. This is a DB25 Male/Female cable assembly. It can be ordered in lengths of 1m, 2m, and 7m.

SCMXRK-002 - 19 "metal rack for mounting SCMXRK-002 -
19 "metal rack for mounting

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SCMXSE - DIN rail side element SCMXSE -
DIN rail side element

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SCMXVS - DIN rail connection pins SCMXVS -
DIN rail connection pins

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