The MASSSO Relay 8 Opto 4 Module is designed to expand the output capabilities of MASSO controllers by converting standard TTL outputs into high-power relay switching and isolated opto-coupled outputs.

This module allows you to safely control external devices such as spindles, coolant systems, vacuum pumps, lights, and other auxiliary equipment.

Overview

This module provides:

• 8 x Relay Outputs for switching high-voltage/high-current devices
• 4 x Opto-Coupled Outputs for isolated low-voltage control signals
• TTL Input Interface compatible with MASSO controllers
• Electrical isolation between the controller and external devices

It is ideal for both industrial and retrofit CNC applications.

Key Features

• Direct compatibility with MASSO TTL outputs
• 8 independent relay channels
• 4 opto-isolated outputs for sensitive equipment
• Electrical isolation for improved system protection
• DIN rail mountable (if applicable to your enclosure)
• Clear labeling for easy wiring and installation
• Multi-colour LEDs on each relay for easy troubleshooting
• Green LED indicates the relay is ON and operating correctly
• Red LED indicates the relay has received a signal but has failed to switch
• Each relay supports up to 5A at 28VDC or 5A at 240VAC
• Operates from a single 24VDC power supply

Typical Applications

• Spindle ON/OFF control
• Coolant pump control
• Dust extraction systems
• Vacuum tables
• Air solenoids
• Lighting systems
• Triggering external PLCs or VFD inputs
• Interfacing with external safety or automation systems

Input Connections (TTL Signals)

The module accepts standard TTL signals from MASSO:

• Input Voltage: 3.3V / 5V TTL compatible
• Signal Type: Digital ON/OFF
• Each input corresponds to one output channel