HBM MP85A - Page 86

Switch test (EASYswitch)
86 A0293_06_E00_03 HBM: public MP85A
Here, you can test and evaluate up to 5 switches or switching elements in a
single operation.
The test verifies whether the switching process of the switch lies within the rel
evant switch test window and whether the specified switching function (make/
break) is complied with.
The electrical check takes place via the digital inputs. Evaluation takes place at
the end of the process.
Tip
As the MP85ADP‐S and MP85ADP-PN-S only have one digital switch test
input, the (virtual) inputs 2 to 5 may be set via PROFIBUS commands, so that
the switch event can be entered, see MP85A interface description.
The switch test inputs are available at screw terminals 3 and 4 and are elec
trically isolated from the internal supply voltage and the control outputs.
S At screw terminal 3: Control input 1
S At screw terminal 4: Control inputs 2 … 5 (MP85A/MP85A‐S only)
For the control inputs, connect an external reference potential ( IN ), to which
the control input signals refer.
Information
The digital inputs of the MP85A process controller are edge-controlled on the
transition from 0V to control voltage (e.g. 24V). The set digital input function is
implemented only once with the rising edge. The subsequent presence of con
trol voltage does not cause any further action.