Rockwell Automation T7470A ICS Regent+Plus Analog Output Modules - Manual

ICS Regent+Plus
®
PD-7025
Industrial Control Services 1
Analog Output Modules
4 to 20 mA
(T7470A)
Issue 1, March, 06
Analog output modules provide 4 to 20 mA current outputs for
a maximum of eight user loads per module. The module's
triplicated I/O Safetybus interface ensures that no Regent
system failure will inadvertently affect the output signal, and
that no failure in the module can affect the operation of the
Regent system or other I/O modules in the system.
Features
· Eight 4 to 20 mA output circuits.
· High resolution 12-bit D/A converter per output.
· Hot-replaceable.
· Automatic testing of triplicate I/O Safetybus circuits and many
simplex logic circuits.
· Front panel indicators on each module show active/fault and
shutdown status.
· 2500 volt minimum electrical isolation between field and logic
circuits.
· TÜV certified, Risk Class 5, non-interfering.
Module Operation
A block diagram of the analog output module is shown in
Figure 1.
The processor modules send triplicated write data commands
to the output module over the I/O Safetybus. The processors’
addressing data and data write commands are voted by the
module (preventing I/O Safetybus failures upstream from the