20
Installation MACH104
Release
07
07/2014
1.6.2 USB interface
The USB socket provides an interface for the local connection of an Auto-
Configuration Adapter. It is used for saving/loading the configuration and for
loading the software.
See “Accessories” on page 34.
1.7 Signal contact
Figure 9: MACH104 device, front view
1 - Signal contact
The signal contact is a potential-free relay contact.
The device allows you to perform remote diagnosis via the signal contact. In
the process, the device signals events such as a line interruption. When an
event occurs, the device opens the relay contact and interrupts the closed
circuit. The management setting specifies which events switch a contact.
You can also use the management to switch the signal contact manually and
thus control external devices.
Figure Pin Operation
1VCC (VBus)
2 − Data
3 + Data
4 Ground (GND)
Table 3: Pin assignment of the USB interface
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