Features and benefits - Johnson Controls - LIT-1901180 - CSDSC - Current Switch - CSDSC Series VFD and Constant Volume Current Switch

CSDSC Series VFD and Constant Volume Current Switch Catalog Page

Product name
CSDSC Series VFD and Constant Volume Current Switch
Document type
Catalog Page
Document number
Revision date

CSDSC switches include the following features:

  • Self-calibrating for proof of flow.
  • From 1 A to 135 A at minimum 30 Hz. From 1.5 A at 20 Hz. From 2.5 A at 10 Hz.
  • Normally open (NO) 30 VAC/DC output.
  • Optional command relay.
  • Depth, 2.50 in.; height, 0.82 in.; width, 2.23 in.
  • Aperture dimensions: 0.75 in. x 0.75 in. You can use the switch for oversize conductors due to the large 0.75 in. aperture.
  • Mount the sensor without removing the conductor, which reduces installation costs.
  • Clamp the switch onto the conductor with the iris, use the detachable base to screw, or DIN mount.
Self-calibration for proof of flow on fans and pumps
  • Works without the need for sensor calibration.
  • No need to open hot starter enclosures, which increases safety and reduces labor costs.
  • The sensor is always correctly adjusted.
Split-core with optional command relay
  • Simplified installation, which reduces component and installation space and cost.
  • Facilitate Normally Closed operation or a higher electrical rating.
Maintenance-free. No call backs
  • Facilitates fan-proofing with less installation time and risk.
  • No pressure tap or dust clogging the hose.
Eliminates hazardous calibration in energized enclosures
  • Eliminates risk associated with guesswork, multi-turn adjustments, or sensor training.
  • Reduces the risk of arc flash.
Setpoint operation
Detects normal current flow for both VFD and constant volume fans and pumps. For an example of a VFD normal current setpoint curve, see the following figure.
Figure 1. Normal flow detection