Beckhoff CU8130-0240, Manual

Page: 24 / 57

Commissioning
CU8130-0240 24 Version: 1.1
6.3.4 Connection via digital I/O
For devices without USB connection, a digital input signal can be monitored. In the event of a power failure,
a power fail signal is sent by the UPS. This signal can be wired to a digital input and monitored in the PLC.
See figure:
Fig. 14: Connection example via digital I/O with an Embedded PC CX7000 with digital inputs.
P FAIL
In the case of Beckhoff Industrial PCs, the P-FAIL output of the UPS can be connected to the PC_ON input
of an Industrial PC. In the event of a power failure, the P-FAIL output is set to 24 V. 24 V are thus applied to
the PC_ON input of the Industrial PC and the Industrial PC is shut down properly.
UPS EN
The Power Status output of an Industrial PC can be connected to the UPS-EN input of the UPS in order to
switch off the U1out and U2out outputs of the UPS in the event of a desired PC shutdown. After the
Industrial PC is shut down, the Power Status output is switched from 24 V to 0 V. This falling edge signals
the UPS to immediately switch off the U1out and U2out outputs.
Similarly, any PLC output can be connected to UPS-EN input, controlled from the PLC and used for non-
Beckhoff PCs or controllers.