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EX-8M Expansion Module

8 Channel Relay Expansion Module

EX-8M Expansion Module...........$ 29.95 Quantity  

ACCESSORIES
Click the add button to add accessories, then click BUY

/M Expansion Port Option*......$ 3.95 Quantity  

MT-2 Stand-off Kit................$ 3.95 Quantity  

RN-8 Relay Card...................$ 79.95 Quantity  

*this option adds I/O port to all ADC-U series, ADC-RS232 series, ADC-RS485 series,
ADC-ENET series, ADC-T series and ADC-WIFI series Analog to Digital Converters.
Adds I/O port to the AR-2MF Relay Interface and to the CO-485USB.
Adds I/O port to all EECI Digital to Analog converters.
The MT-2 is needed to provide separation.


EXM-16 Expansion Module

Front End Modules

View Relay Cards

View Accessories


Relay Control with Analog to Digital Converter for $ 29.95 ADC4-12WIFI shown with the
EX-8M and RN-8 Relay Card





  • Adds Relay Control and/or Inputs to all ADC-U series, ADC-RS232 series, ADC-RS485 series, ADC-ENET series, ADC-T series and ADC-WIFI series Analog to Digital Converters (with /M option)
  • Adds Relay Control/Inputs to the AR-2MF Relay Interface, the CO-485USB and to all EECI Digital to Analog Converters (with /M option)
  • Also available in side mount version (EX-8MS) see below
  • May be set to control 8 relays or monitor 8 inputs or combinations (two EX-8MS cards may be connected to ADC-U series allowing 16 relays/inputs)
  • Large variety of relay cards may be connected to relay port - RD-8, RG-8, RH-8, RI-8, RJ-8, RN-8, RYD-8, specialty cards and others
  • Powered from USB port or ADC/DAC power source
  • May be used stand alone with the addition of the EXM-USB, EXM-WIFI, EXM-ENET or EXM-RS232, EXM-RS485 Front End modules
  • Multi-Function capability allows for connection of a large variety of I/O devices
  • Miniature Solid State Relays are available that plug directly into the opto isolator socket and provide high current output in place of the opto output
  • Terminal Block provided for inputs or direct connection to LEDs, low power relays or most solid state relays (100mw max)
  • Optically isolated relay outputs and inputs that protect your computer and allow relays, keypads and other devices to be located up to several miles from the EX-8M and computer
  • Inputs may be used to monitor contact status or monitor AC or DC voltages 3.3 volts to 18 volts default (other voltage ranges available)
  • Use the SW-A Load Programmer software for 7 day time control of relays
  • Compatible with Windows XP, Vista, Windows Server, Windows 7, Windows 8.1, Windows 10 and Windows 11
  • Source code examples included in Microsoft Visual Basic.Net, C#, C++, Python, Microsoft ASP.Net and others
  • May be mounted inside the EN-A, EN-B or EN-C enclosures
  • Full technical support provided by on staff advisors
  • Connect your Relay Interface to your Android tablet or phone's USB port! Click the Android for more info about the free Android App...

USB and WiFi Relay Controller EX-8MS Side Mount Relay Expansion Card EX-8M Mounted to ADC12-12WIFI
EX-8MS Side Mount VersionEX-8M Mounted to the ADC12-12WIFI

EX-8M Description and Spec

EX-8M Technical Reference

View All Relay Products


Electronic Energy Control, Inc.
14960 Maple Ridge Rd
Milford Center OH 43045-9016

TOLL FREE (24 hour order line)
(800) 842-7714

Technical Support (937) 349-6000
Internet Email cst@eeci.com

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All Rights Reserved
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