The Mitsubishi digital expansion module has 16 digital input (24VDC sink/source selectable). They can be attached directly to the right-hand end of the base unit or expansion unit that also provides power. Input points can be configured in both sink and source, selectable to suit NPN or PNP devices. The input channels are added depending upon the size of the base unit. The input module has specific switching elements for adaption to many control tasks.
Mitsubishi Q Series Digital & Analogue I/O Modules
The Q series is a modular system

Phototcoupler insulation between the input terminals and PC power
High response time
Status indication LEDs present
Ambient operating temperature ranges from 0°C to 55°C
Equipped with screw terminals for direct connection input wiring

Industrial automation
Robotics
Automobile industry

ANSI/ESD S20.20:2014
BS EN 61340-5-1:2007