Installation
10
3.6
Connect Network Surge protection
Connect a 10 base-T/100 network cable to the RJ-45 network surge protection IN jack on the rear of
the UPS. Connect from the OUT jack with network cabling to network equipment (see
Figure 10
).
Figure 10
Connect network surge protection
3.7
Connect Computer Interface Port
Determine what type of communication connection to use to manage the UPS. The Liebert PSI XR
can be monitored with any of these communication methods:
• serial
• contact closure
• USB
• SNMP
See the Liebert shutdown software installation guide on the included CD-ROM for details and instal-
lation information. Also refer to
6.4 - UPS Communications
.
Figure 11
Connect computer interface port
DC 48V
EPO
INPUT
OUTPUT
VOLTAGE=2 2 0V
VOLTAGE=2 3 0V
VOLTAGE=2 4 0V
2
1
FUNCTION
Network Surge
Protection OUT Jack
Network Surge
Protection IN Jack
Network
Equipment
DC
4
8
V
EPO
IN
PU
T
O
U
T
PU
T
V
O
LT
A
G
E
=
22
0V
V
O
LT
A
G
E
=
23
0V
V
O
LT
A
G
E
=
24
0V
2
1
FU
N
C
TI
O
N
USB connector is to left of DB-9 port
on the UPS; USB port on computer varies
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Liebert UPS user manual
