Rockwell Automation T3485 ICS Regent Isolated Guarded Output Modules - Manual (Page 2)

Isolated Guarded Digital Output Module (T3485)
2
Industrial Control Services
Two isolated Guarded output modules can be connected in
parallel to obtain fault tolerant control of power to loads. In
this parallel module configuration, either module can be
removed and replaced while the other Guarded module
continues to control the loads without interruption.
Module Operation
A block diagram of a typical isolated Guarded digital output
module is shown in Figure 1.
Figure 1. Block Diagram of Isolated Guarded Digital Output Module.
The processor modules send triplicated write data commands
over the I/O Safetybus to the isolated Guarded output module.
Onboard the output module the triplicated data are routed to
two independent voters which provide voted data to associated