Manual

Chapter 2

I/O Scanner Concepts

2-2

I/O modules sit in one or more chassis. An I/O chassis is a housing that

holds one adapter and 1, 2, 4, 8, 12, or 16 I/O modules. The adapter is the

communication interface between the scanner and the chassis. The scanner

communicates with the adapter through shielded two–conductor

twisted–pair cable (the “blue hose”). In turn, the adapter monitors and

controls the I/O modules through the backplane of the chassis. You can

connect up to 16 chassis to the scanner on the blue hose. You can combine

chassis in any way that results in 8 or less rack addresses.

Industry

Host

SI Scanner

I/O Chassies can contain 8 bit,

Remote I/O Cable

Adapter

I/O Chassis

14652

Bus

Processor

Adapter

I/O Chassis

16-bit, or 32-bit discrete I/O

modules. Analog, and/or

intelligent I/O modules.

You address them using 1/2 slot,

1-slot or 2-slot addressing