Demand Control Accessories

9373A Current Loop Control Module

 9373A Current Loop Demand Control Controlling industrial and HVAC loads using a 4-20mA current loop is now possible with the 9373A Current Loop Control Module.  The model 9373A directly interfaces between the 9388C Demand Management System and a controlled load with a 4-20mA current loop control input. 

The 9373A gives installers and customers an easy, low-cost way to control large loads in commercial and industrial demand control applications without the hassle or time-consuming problem of creating a custom control interface.  The 9373A allows proportional control from 0 to 100% in 9 steps between 4 to 20mA, allowing control loads to be “stepped –down” instead of turned on and off.  This is preferred with large loads that cannot be turned on or off but may be “throttled back”.


The 9373A has been utilized in a variety of industrial demand control applications to help control loads such as:

  • HVAC
  • Chillers
  • Lighting


The 9373A was designed with several features to meet your specific needs

  • Includes positive or negative control slope functions to increase or decrease the current in the loop
  • Capable of Internal current limiting
  • 8 output steps allow for step control-  permits large loads to be stepped up or down in small increments for a fine level of control
  • Ability to run wires for long distances and overcome any potential voltage drop issues
  • Superior noise immunity
  • Board is conformal coated with polyurethane coating for superior moisture and humidity resistance


Power Input: +24VDC supplied from Model 9388C or 9388M Demand Management Control System.
Input: 8 control inputs are supplied by the Mode 9388C or 9388M Demand Management Control System. Each control input acts as an incremental step of approximately +/2mA of current in the current loop when activated.
Outputs: One 4-20mA output, approximately 10VDC into a 250ohm resistor.
Maximum Output Voltage: 24VDC
Maximum Output Current:


Mounting: Mounts in the Model 9388C or 9388M in one of two output board positions.
Size: 2" wide x 7.5" long
Weight: 4oz


Temperature Range: 0ºC to +85º
Humidity: 0 to 98% non-condensing