3500/70 140471-01 Input Module provides the interface between the RX3i and external input devices such as sensors, pushbuttons and switches. The Input Module is designed for applications such as switchgear used in various utility industries using a 125V DC power supply.125 Volt DC Positive/Negative Logic Input Module provides a set of 16 input points with a common power input terminal. This input module can be wired for positive or negative logic.

The 3500/70 140471-01 is a high performance controller with a 300 MHz Intel microprocessor and 10 MB of user memory, eliminating the need for multiple controllers and simplifying control. Features include:
A general-purpose backplane with a high-speed PCI bus running at 27 MHz for fast data throughput for complex I/O and a serial bus for performance optimisation of simple I/O. The universal backplane also supports hot-swapping to minimise downtime.
A wide range of I/O modules (over 40 types) are available for simple to complex applications; a variety of network modules are also available.