Installation and Connection
Digital Inputs
This module is provided with 8 grouped digital inputs.
In chapter [Device parameter/Digital Inputs] the assignment of the digital inputs is specified.
Make sure that the tightening torque is 0.55 Nm (4.9 lb-in).
The ground terminal has to be connected to the »-pole« when using DC
supply.
For each digital input group the related voltage input range has to be
parameterized. Wrong switching thresholds can result in
malfunctions/wrong signal transfer times.
Via the »assignment list« the states of the digital inputs are assigned to the
module inputs (e.g. I[1]).
The digital inputs are provided with different switching thresholds (can be parameterized) (two AC and five DC
input ranges). For each group the following switching thresholds can be defined:
•
24V DC
•
48V DC / 60V DC
•
110 V AC/DC
•
230 V AC/DC
If a voltage >80% of the set switching threshold is applied at the digital input, the state change is recognized
(physically “1”). If the voltage is below 40% of the set switching threshold, the device detects physically “0”.
EN MRA4 04/09
Page 31
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