Lighthouse developed the Mini Multiplexer for monitoring multiple 4-20mA analog points in a single area.

The Mini Multiplexer provides support for up to four 4-20mA input signals (including particle counters) and four external alarm devices, such as light sticks, buzzers or other digital output modules.

The Mini Multiplexer communicates via MODBUS/ASCII or MODBUS/RTU and was designed with two RJ-45 connectors to allow daisy-chaining with other RS-485 instruments. The Mini Multiplexer is compatible with SOLAIRs and other Lighthouse Instruments on a daisy-chain when all are running MODBUS/ ASCII.

Power, Analog Inputs and Digital Outputs are connected via screw terminals for easy field installation and service of the unit. Connection to a variety of sensors and devices is possible without special connectors or tools. The REMOTE Mounting Kit option provides additional flexibility for mounting the Mini Multiplexer.

Designed and built by Lighthouse Worldwide Solutions, a name you can trust.

Mini Multiplexer Datasheets
Letter Size – Lo Res               A4 Size – Lo Res
Letter Size – Hi Res                A4 Size – Hi Res

  • Real-time Updates of Analog Data
  • Monitors up to four 4-20mA Analog Input Signals
  • Supports four Digital Alarm Outputs
  • Supports MODBUS/RTU and MODBUS/ASCII Data Access Protocols
  • Stainless Steel Enclosure
  • Mounts using REMOTE Mounting Kit
  • Operates on 24VDC
  • Easy Daisy-Chaining of Instruments
  • 2 Year Warranty
  • International Support
  • Low Cost of Ownership
  • Integrating 4-20mA Analog Sensors into RS-485/MODBUS Network
  • Integrating 4-20mA Remote Particle Counters into an RS-485/MODBUS Network
  • Cleanroom Monitoring
  • Expanding Facility Monitoring Capacity


Analog Input Channels: 4
Analog Signal: 4-20mA
Relay Output Channels: 4
Sample Time: 60 seconds
Power Supply: External 24VDC, 100-240VAC Input
LED Indicators: Power
Connectors: RJ45 for Daisy Chaining; Terminal Connectors for Analog Input/Output
Enclosure: Stainless Steel
Unit Power: 24 VDC
Dimensions: 1.7”(l) x 4.2”(w) x 2.5”(h) [4.318 x 10.668 x 6.35 cm]
Weight: 9.4 oz [0.266 kg]


Operating: 50°F to 122°F (10°C to 50°C) / 20% to 95% non-condensing
Storage: 14°F to 122°F (-10°C to 50°C) / Up to 98% non-condensing

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