Industrial control components serve as the backbone of many modern automated systems.
They have an extended range of capabilities that can perform many useful control
functions: relay logic, counting, timing and sequencing functions, and even complete
control of individual machines or complex processes through input and output functions.
Because of their critical union with industrial equipment, PLCs, HMIs, Controllers and
Starters, and the I/O modules that serve them are often found and used in harsh
environments. When troubleshooting industrial control components, it is important to look
beyond the components themselves. Their delicate place in an industrial control network
means receiving, or not receiving, input from any number of external components that may
be at fault.