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Relay Module

The optional Relay Module adds two programmable dry-contact relays. The open collector output in the 9900 base unit uses the Relay 1 setting. The optional Relay Module is assigned to relays 2 and 3 in the menus.

  • Dry-contact relays are electromechanical switches with a moving contact armature. They are suitable for many general purpose applications, AC or DC, including loads up to 250 V.  Install RC Filter kits (3-8050.396) on relays used to switch motor or inductive loads.  This module adds two programmable dry-contact relays to the standard Open Collector output on the base unit.

Technical Details

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3-9900.393Relay Module - 2 DCR (Dry-contact relays)MeasurementsCAD 159001698


  • Up to 8 relays
  • 12 to 24 VDC or 100 to 240 VAC ±10%, regulated power

  • Accepts 3rd party 4 to 20 mA output devices when used with 8058 signal converter

  • Up to 4 analog outputs
  • Measures Flow, pH, ORP, Conductivity, Pressure, Level and Temperature
  • 1/4 DIN enclosure
  • Hysteresis and time delay available for each relay
  • User programmable
  • Digital Communication allows for extended cable lengths, and easy wiring

  • Multi-language display
  • Adds two programmable dry-contact relays
  • Available in panel mount only

Fields of Application:
  • Chemical Processing
  • Metal and Plastic Finishing
  • Demineralizers
  • Fume Scrubbers
  • Wastewater Treatment
  • Aquatic Animal Life Support Systems
  • Pure Water Production
  • Cooling Tower & Boiler Protection

  • CE
  • UL
  • RoHS Compliant


9900 Transmitter.pdfPDF1.08 MBDownload
Automation Made Easy.pdfPDF5.11 MBDownload

EC Declaration of conformity.pdfPDF24.24 KBDownload

Data Sheet - 9900 Transmitter.pdfPDF2.46 MBDownload

Instruction Manual
German Instruction Sheet - Relay Module for 9900PDF1013.42 KBDownload
Italian Instruction Sheet - Relay Module for 9900PDF979.05 KBDownload
Chinese Instruction Sheet - Relay Module for 9900PDF1.23 MBDownload
English Manual - 9900 Transmitter.pdfPDF7.77 MBDownload
Spanish Instruction Sheet - Relay Module for 9900PDF967.35 KBDownload
English Instruction Sheet - Relay Module for 9900PDF979.37 KBDownload


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