VIO10-P
PROFIBUS-PA REMOTE I/O
INSTALLATION, OPERATION, CONFIGURATION AND MAINTENANCE MANUAL
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8
The sensor signals are galvanically isolated from the power supply, but are not insulated from each
other.
Digital inputs and outputs have latches that store their logic states. They are isolated, guaranteeing
the integration of the signals. The outputs use open-collector NPN transistors. User must work with relays,
solenoids and other loads DCs with maximum current of 0.5 A per output. All outputs share the same ground
and are isolated from each other, as well as from Profibus-PA network. The digital inputs and outputs share
the same DC source.
The H1 Modem Block interfaces the microcontroller signals with the Profibus-PA network to which
the equipment is connected.
The display board has the controller module responsible for adapting the messages to be displayed
on the LCD.
Finally, the microcontroller block can be related to the brain of the equipment, where all the time
controls, communication control, plus routines common to the equipment such as configuration, calibration
and monitoring take place.
NOTE
The sensor signals are galvanically isolated from the power supply, but are not insulated from
each other. Therefore, isolated sensors must be used to prevent noise from one sensor from
interfering with the other. There is also no insulation between the temperature channels and the
output current channels.
