Accessories • External UPS
Section 6
Accessories
309
Panel PC 800 User's Manual V 1.00
7. External UPS
7.1 General information
For supply with an external UPS, a UPS charging unit, a battery unit and a null modem cable are
required.
In normal operation, the 24 VDC supply voltage is put straight through to the load system. If the
supply voltage fails, the rechargeable UPS batteries power the PC to allow controlled shutdown
without loss of data.
Data and commands are exchanged between the UPS and the load system via the handshake
signals for an RS232 interface.
More information concerning an external UPS is available in the "UPS manual", which can be
downloaded from the B&R homepage (
Figure 145: Block diagram of the UPS
UPS charging unit
Battery unit
e.g. 9A0100.14
Load system B&R PPC 800
24 VDC
Handshake signals
(via zero modem cable)
24 VDC mains
Te
mper
ature sensor
24
VDC
Содержание MAPPC800-ENG
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