SATEC EM920 Operation Manual - Manual (Page 29)

Chapter 2 Operating the EM920
Auxiliary AC/DC Backup Power Supply
EM920 Power Quality and Revenue Meter 29
network. When client operation is enabled, it automatically
readdresses network connections to the GPRS port if the
GPRS module is installed.
NOTE
When either Ethernet or GPRS network parameters are
changed, the meter logs out of the network so the IP address
you might use for connecting to the meter will no longer be
effective. Check the meter for a new GPRS IP address either
from the front display, or via PAS.
USB Communications
An embedded full speed 12-Mbit USB 1.1 port provides a
local communications with the support PAS software.
USB communications does not require any settings. Just
connect your PC to the EM920 USB port using the supplied
USB cable and install the USB driver provided on the CD with
your meter (see
Installing the USB Driver in Chapter 4).
Auxiliary AC/DC Backup Power Supply
An auxiliary AC/DC backup power supply module can be
provided for powering the meter from an external AC/DC
power source in the event of power outages for maintaining
continuous uninterrupted operation of the meter.
See the EM920 Installation Manual for the power supply
ratings and connection diagram.
The module is provided with a yellow indication LED that
lights when the external AC/DC voltage is applied to the input
terminals.