On-Machine™ Block (IP67/69K) Distributed I/O modules can be mounted directly on a machine rather than in a remote, central cabinet, which reduces wiring costs and provides easier maintenance. These products provide a complete assembly of sensor and actuator interface points, and each module includes a network adapter. Expansion blocks are available for some products. You can choose from analog, digital, and specialty I/O modules, as well as On-Machine I/O modules for safety systems