ViewMarq MD4 Series LED Message Display Manual

This document describes the ViewMarq MD4 series, a 2-line, tri-color LED message display available in 12-character and 24-character models, designed for industrial real-time data and PLC-triggered messaging. It supports serial ASCII, Modbus RTU, and Modbus TCP communications, features NEMA 4/12 rated aluminum housing, and includes free configuration software.