Epo - Emergency Power Off" Command Connection - ABB MegaFlex 1000 UL S1 Installation Manual

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4.11.4 "EPO - Emergency Power OFF" command connection

Warning!
The connection of an emergency button EPO (Emergency Power Off) must be performed only by an
ABB Service Technician when the UPS is completely powered down!
Note!
The reliability of the system depends on this contact NC (Normally Closed)!
An Emergency button (Normally Closed voltage-free contact) can be connected on terminals XA / EPO-1, EPO-2.
Max. rating XA terminals: AWG 14 (2.5mm
XA
When opened, this contact causes the
immediate opening of the Contactors K3,
K6 and K7 as well as the shut-down of
Rectifier, Inverter and Static-Switch.
In a Parallel System a separate NC (Normally Closed) contact must be connected individually
to each unit.
XA
Fig. 4.11.4-2 XA "EPO - Emergency Power Off" – RPA Parallel System connection schematics
2
).
1 2
1
2 3 4
5 6 7
1 2 13 14
8 9
15 16 1 7 21 22
18 19 20
10 11
Customer Interface
Fig. 4.11.4-1 XA terminal block for EPO command connection
MegaFlex 1000 to 1600
Note!
This procedure could imply a Load shut-down.
Keep SELV cables separated from high voltage cables.
XA
UPS Installation Guide / REV-A
XA
EPO