Red Lion AFCM0000 Analog TO frequency converter module

 VOLTAGE/CURRENT TO FREQUENCY CONVERTER
  3-WAY ISOLATION OF INPUT / OUTPUT SIGNALS 
 UNIVERSAL CONVERSION MODULE - INPUTS AND OUTPUTS SELECTED VIA DIP SWITCH SETTINGS 
  ULTRA SLIM DESIGN – ONLY 0.244" WIDE 
  19 to 30 VDC POWER UL Recognized Component,