FloBoss 407 Instruction Manual
Rev 5/00 3-3
Adjacent to each I/O module socket is a plug-in terminal block for field wiring connections. The plug-
in terminal blocks permit removal and replacement of the modules without the need to disconnect field
wiring. The ROC/FloBoss accommodates any number of modules in any combination up to the limit of
the I/O module rack or board. Figure 3-1 shows a typical I/O module.
SENSITIVE
STATIC
DOC0034C
Figure 3-1. Typical I/O Module
3.2.1 Analog Input Loop and Differential Modules
The Analog Input Loop (AI Loop) and Analog Input Differential (AI Differential) modules are used for
monitoring current loop and voltage output devices. Each AI module uses a scaling resistor for scaling
loop current to achieve the proper input voltage.
The AI Loop module provides a source voltage for powering current loop devices and can also be used
as a single-ended voltage output. The AI Differential module monitors loop current or voltage input
from externally-powered devices and provides electrical isolation from the ROC/FloBoss power
supplies.
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