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Digital inputs
7 I/O functionality
Instruction book, IQAN-MC3
Digital inputs
The digital inputs can be connected to vehicle power (i.e. +BAT) or +VREF.
For digital input characteristics, see Appendix A, on page 46.
Connecting switches to the digital inputs
The switch would be powered by +BAT when it is desired to conserve +VREF for
powering sensors and joysticks.
Using digital inputs in safety functions
The following addional information applies when the inputs are used in safety
functions, where an incorrect input signal can lead to an immediate increase of the risk.
If the additional signal is read by another digital input, it is recommended that the
signals are not equal. For example, use linked normally open and normally closed
switches.
EXAMPLE
Connect the positive and negative terminals of the switch to +BAT and a DIN,
respectively.
Connecting a switch to DIN.
MC3-SMR-009:A Use of DIN inputs in pairs
When digital inputs are used in safety functions, the application shall be designed so
that the input signals are compared to an additional signal to ensure that it is correct.
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