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SCM5B39

Current Output Signal Conditioners, Bandwidth 275 / 400 Hz

Each SCM5B39 current output module provides a single channel of analog output. The track-and-hold circuit in the input stage can be operated in a hold mode where one DAC can supply many output modules, or a track mode where one DAC is dedicated to each module. In addition to the track-and-hold circuit, each module provides signal buffering, isolation, filtering, and conversion to a high-level current output.

Setting of the track or hold mode is controlled by the logic state of WR EN\, module pin 23. When pin 23 is low, the track mode is enabled. If pin 23 is high, the hold mode is enabled. The module is designed with a completely isolated computer side circuit which can be floated to ± 50 V from Power Common, pin 16. This complete isolation means that no connection is required between I/O Common and Power Common for proper operation of the track and hold circuit. For a low state, simply connect pin 23, the Write-Enable pin, to I/O Common, pin 19.

The SCMPB02 and SCMPB06 backpanels allow host computer control of the WR EN\ control line, which allows multiplexing of one host DAC to up to 64 SCM5B39 output modules. During power-up, the output remains at 0 mA for 100 ms on all models except the SCM5B39-07, which allows the track-and-hold circuit to be initialized.

A special circuit in the output stage of the module provides protection against accidental connection of power-line voltages up to 240 VAC on all models.

Circuit diagram Dataforth SCM5B39

Block Diagram SCM5B39



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18 Modules for Type SCM5B39:

ModuleInputDescription
SCM5B39-01 0 to +5 V SCM5B39 Isolated Current Output Module with Voltage- or Current-Input
SCM5B39-02 -5 to +5 V SCM5B39 Isolated Current Output Module with Voltage- or Current-Input
SCM5B39-03 0 to +5 V SCM5B39 Isolated Current Output Module with Voltage- or Current-Input
SCM5B39-04 -5 to +5 V SCM5B39 Isolated Current Output Module with Voltage- or Current-Input
SCM5B39-05 0 to 20 mA SCM5B39 Isolated Current Output Module with Voltage- or Current-Input
SCM5B39-07 -10 to +10 V SCM5B39 Isolated Current Output Module with Voltage- or Current-Input
SCM5B392-01 0 to +5 V SCM5B39 Isolated Current Output Module with Voltage- or Current-Input
SCM5B392-0111 0 to +5 V SCM5B39 Isolated Current Output Module with Voltage- or Current-Input
SCM5B392-02 -5 to +5 V SCM5B39 Isolated Current Output Module with Voltage- or Current-Input
SCM5B392-0212 -5 to +5 V SCM5B39 Isolated Current Output Module with Voltage- or Current-Input
SCM5B392-03 0 to +10 V SCM5B39 Isolated Current Output Module with Voltage- or Current-Input
SCM5B392-0313 0 to +10 V SCM5B39 Isolated Current Output Module with Voltage- or Current-Input
SCM5B392-04 -10 to +10 V SCM5B39 Isolated Current Output Module with Voltage- or Current-Input
SCM5B392-0414 -10 to +10 V SCM5B39 Isolated Current Output Module with Voltage- or Current-Input
SCM5B392-11 4 to 20 mA SCM5B39 Isolated Current Output Module with Voltage- or Current-Input
SCM5B392-12 4 to 20 mA SCM5B39 Isolated Current Output Module with Voltage- or Current-Input
SCM5B392-13 4 to 20 mA SCM5B39 Isolated Current Output Module with Voltage- or Current-Input
SCM5B392-14 4 to 20 mA SCM5B39 Isolated Current Output Module with Voltage- or Current-Input

Specifications

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  • Input: V-Signal
  • Output: 0 to 20mA / 4 to 20mA / -20 to + 20mA
  • Bandwidth 400 Hz or 275 Hz (SCM5B39-07)
  • Isolation 1500 Vrms
  • Input protection 240 Vrms
  • Input Resistance 50 MOhm or 2 MOhm (SCM5B39-07)
  • Accuracy ± 0.03% or ± 0.05% (SCM5B39-07)
  • Linearity ± 0.005% or ± 0.03% (SCM5B39-07)
  • ANSI/IEEE C37.90.1 Input protection
  • CMR 110dB
  • True 3-way isolation
  • NMR: 80dB / Decade > 400 Hz or 275 Hz (SCM5B39-07)
  • Power Supply +5 VDC
  • Operating Temperature Range -40°C … +85°C
  • Mix and Match Types on Backpanels possible
  • Dimensions 58 x 57 x 15 mm
  • Optional DIN Rail Mounting
  • CSA certified, CE and ATEX compliant
  • Wide range of accessories
  • Special Solutions on request