System Overview 25
Chapter 3 System Description
For a brief description of the modules, see the following tables.
Main Processor Module
Communication Module
Analog Input Module
Analog Output Module
Digital Input Module
Model Description Points
3101 14-maximum I⁄O modules, executes control application
and votes on inputs and outputs
Not applicable
Model Description Points
3201 Interfaces, Modbus master or slave, selectable RS-232/
485 serial ports, TriStation, Triconex Peer-to-Peer,
TSAA, and TCP-IP/UDP-IP
Not applicable
Model Description Points
3351 4–20 mA, commoned, 6% over-range 32
Model Description Points
3481 4–20 mA, commoned, 6% over-range 4
3482 2 @ 4–20 mA, 2 @ 4–40 mA, commoned, 6% over-range 4
Model Description Points
3301 24 V DC, commoned 32