14 Chapter 1 Installation Of UPS Module
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
1.7.4 Backfeed protection Output Dry Contact Port
J5 is the output dry contact port, providing two relay output dry contact signals. The port is shown in Figure 1-12 and
described in Table 1-5. The shunt trip coil of the external circuit breaker can be driven directly through this dry
contact rated for 24Vdc/5A.
J5
BF
P
_C
BF
P
_S
BFP_O
Figure 1-12 Output dry contact port
Table 1-5 Description of output dry contact port
Position Name
Description
J5.2 BFP_O
Bypass feedback protection relay (normally open), closed when bypass
silicon-controlled rectifier (SCR) is shorted
J5.3
BFP_S
Bypass feedback protection relay center
J5.4 BFP_C
Bypass feedback protection relay (normally closed), open when bypass SCR is
shorted
1.7.5 Remote Emergency Power Off (REPO) Input Port
The UPS has an EPO function that operates by a button on the operator control and display panel of the UPS or by a
remote contact provided by the user. The EPO switch is under a hinged, plastic shield.
J10 is the remote EPO input port. The port is shown in Figure 1-13 and described in Table 1-6.
J10
+12V
EPO
_N
O
+1
2V
+1
2V
EPO
_N
C
Figure 1-13 Remote EPO input port
Table 1-6 Description of remote EPO input port
Position Name
Description
J10.1 EPO_NC
EPO activate when J10.1 and J10.2 are open
J10.2 +12V
J10.3 +12V
EPO activate when J10.1 and J10.4 are closed
J10.4 EPO_NO
Notes
1.
The UPS EPO action disables the UPS a.c. output by shuting down the rectifiers, inverters and static bypass.
2. The UPS EPO action does not disconnect any input power supply. To disconnect all power from the UPS, open the
upstream input breaker(s) and the battery breaker when EPO is activated.
3.
Pins 1 and 2 of J10 are supplied factory-shorted.
4. If the UPS EPO function is not used, pins 1 and 2 of J10 must remain shorted and pins 3 and 4 of J10 must remain
open .
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