Installation and Connection
This assembly group comprises:
a wide-range power supply unit
6 digital inputs, grouped
2 digital inputs, non-grouped
Connector for the functional earth
Functional Earth
In addition to the grounding of the housing (protective earth, see Chapter
“Installation and Wiring”) there must be an additional ground cable
connected to the power supply card (functional earth, min. 2.5 mm
2
[≤ AWG 13], tightening torque 0,56 ‒ 0,79 Nm [5‒7 lb∙in]).
Connect this ground cable to terminal No. 1, see the “Terminals” diagram
below.
All grounding connections (i. e. protective and functional earth) must be
low-inductance, i. e. as short as possible, and national standards – if
applicable – must be followed.
Auxiliary voltage supply
The aux. voltage inputs (wide-range power supply unit) are non-polarized. The device could be provided with
AC or DC voltage.
Digital inputs
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.
The digital inputs are provided with different switching thresholds (can be parameterized) (two AC and five DC input
ranges). For the six grouped (connected to common potential) inputs and the two non-grouped inputs the following
switching levels 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”.
When using DC supply, the negative potential has to be connected to the
common terminal (COM1, COM2, COM3 - please see the terminal marking).
39 MCDGV4 DOK-HB-MCDGV4-2E
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