HIMA HIMax X-MIO 6 01, Руководство пользователя

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X-MIO 7/6 01 3 Product Description
HI 801 305 E Rev. 5.00 Page 15 of 72
3.4 Structure
The chapter is structured as follows:
 Description of the inputs and outputs
 Block diagram
 Indicators (module)
 Specifications
 Connector boards
 System cable
The safety-related 1oo2 processor system for the I/O module performs the following functions:
 Trip function
 2oo3 evaluation of the values sampled for the rotation speed and direction
 2oo3 evaluation of the digital inputs
 Control and monitoring of the I/O level
The data and states of the I/O module are made available to the processor modules via the
redundant system bus. The system bus has a redundant structure for reasons of availability.
Redundancy is only ensured if both system bus modules are inserted in the base plates and
configured in SILworX.
3.4.1 Measuring Inputs and Rotation Sense Inputs
The overspeed trip module is equipped with three measuring inputs and three rotation sense
inputs. These use signals from three independent sensors (pulse generators) to determine the
rotation speed and direction of a turbine.
To feed the sensors (pulse generators), a short-circuit-proof supply is assigned to each
measuring input. The supply voltage is monitored for undervoltage. The hardware ensures that
the supply voltage is not exceeded.
The supply for the measuring inputs is monitored to ensure that the configured load current is
not exceeded, see Chapter 4.3.
3.4.2 Digital Inputs
The overspeed trip module is equipped with three digital inputs (DI 02...DI 04) that evaluate
external trip signals. A short-circuit-proof and current limited supply used to feed control circuit
devices of type 3 is assigned to each digital input.