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Current Multiplexer

Item# DRA-CSM-1

Current Multiplexer Current Multiplexer
The DRA-CSM-1 Current Multiplexer is a solid state multiplexer capable of transferring the selected 4-20 mA input current signal to the output terminals in less than 10 microseconds at an accuracy better than 0.01%. The DRA-CSM-1 is typically controlled by a PLC thereby obtaining full data synchronization. The DRA-CSM-1 is provided with a unit enable/disable control line which enables the parallel connection of several multiplexers to the same controller input. The period during which the unit is disabled is used for self-testing according to a self-test procedure which checks the unit’s hardware. Model DRA-CSM-1 is powered by an external DC power supply. Each two-wire 4-20 mA transmitter is connected to the input terminals. Each channel provides a current limited voltage supply for the connected two-wire transmitter. The channel selected by the multiplexer is directed to the control device’s (e.g., PLC’s) analog inputs. Power is maintained by the multiplexer to the unselected channels thereby maintaining uninterrupted transmitter current flow. Each 4-20 mA input channel on the multiplexer has its own red LED status light which illuminates on presence of current in the loop.
DRA-CSM-1
  • DRA-ACT-SI Series AC Current Input
  • DRA-ACT-SV Series AC Voltage Input
  • Self-Powered
  • Isolated
  • Low Profile Enclosure
Input Type
Number of Inputs
Output Type
Quantity Price each
1-4 $670.00
5-9 $636.50
10-24 $623.10
25-49 $596.30
50-99 $582.90
100+ $569.50

In stock

Lead Time ( If not in Stock): 8 weeks

Product Specs

  • Accuracy Value ±0.01% of span (for full temp range)
  • Form Factor Standard 35 mm DIN rail or wall mount
  • Indicator 16 red LEDs for current inputs
  • Maximum Ambient Humidity 95% RH non-condensing
  • Maximum Ambient Temperature 70 {C} (158 {F})
  • Minimum Ambient Temperature 0 {C} (32 {F})
  • Maximum Storage Temperature 85 {C} (185 {F})
  • Minimum Ambient Humidity 5% RH
  • Minimum Storage Temperature -25 {C} (-13 {F})
  • Form Factor Standard 35 mm DIN rail or wall mount
  • Accuracy Value ±0.01% of span (for full temp range)
  • Indicator 16 red LEDs for current inputs
  • Maximum Storage Temperature 85 {C} (185 {F})
  • Maximum Ambient Humidity 95% RH non-condensing
  • Maximum Ambient Temperature 70 {C} (158 {F})
  • Minimum Ambient Humidity 5% RH
  • Minimum Ambient Temperature 0 {C} (32 {F})
  • Minimum Storage Temperature -25 {C} (-13 {F})

The DRA-CSM-1 Current Multiplexer is a solid state multiplexer capable of transferring the selected 4-20 mA input current signal to the output terminals in less than 10 microseconds at an accuracy better than 0.01%. The DRA-CSM-1 is typically controlled by a PLC thereby obtaining full data synchronization. The DRA-CSM-1 is provided with a unit enable/disable control line which enables the parallel connection of several multiplexers to the same controller input. The period during which the unit is disabled is used for self-testing according to a self-test procedure which checks the unit’s hardware. Model DRA-CSM-1 is powered by an external DC power supply. Each two-wire 4-20 mA transmitter is connected to the input terminals. Each channel provides a current limited voltage supply for the connected two-wire transmitter. The channel selected by the multiplexer is directed to the control device’s (e.g., PLC’s) analog inputs. Power is maintained by the multiplexer to the unselected channels thereby maintaining uninterrupted transmitter current flow. Each 4-20 mA input channel on the multiplexer has its own red LED status light which illuminates on presence of current in the loop.

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