Output Dry Contacts; Figure 4 Jumper Connection For Bcb Interface; Figure 5 Output Dry Contacts And Epo Wiring; Table 6 Output Dry Contact Relays - Emerson Liebert NX User Manual

Single Module UPS Installation
Figure 4 Jumper connection for BCB interface
1.8.4

Output Dry Contacts

There are three output dry contact relays at the X1 slot (see Figure 5 and Table 6). The relay con-
tacts are suitable for extra-low voltage applications up to 1A.
Figure 5 Output dry contacts and EPO wiring
X1
J13
Table 6 Output dry contact relays
Position
J13.2 BFP_O
J13.3 BFP_S
J13.4 BFP_C
J21.2
J21.3
J21.4
J25.2
J25.3
J25.4
NOTE
All auxiliary cables of terminal must be double-insulated. Wire should be 0.5-1.5mm
(16-20AWG) stranded for maximum runs between 25 and 50 meters (82-164ft.) respectively.
UPS Monitoring Board
J10
J21
Name
Description
Bypass feedback protection relay; normally open; closed when bypass SCR is shorted
Bypass feedback protection relay center
Bypass feedback protection relay; normally closed; open when bypass SCR is shorted
INV_O Inverter mode relay; normally open; closed when UPS is in inverter mode
INV_S Inverter mode relay center
INV_C Inverter mode relay; normally closed. Opened when UPS is in inverter mode
ACF_O Main input fault relay; normally open. Closed when main input is in fault
ACF_S Main input fault relay center
ACF_C Main input fault relay; normally closed. Open when main input is in fault
Aux – N.O.
Aux – N.O.
Battery Circuit Breaker
J25
13
+12V
J28
EPO - NO EPO - NC
2
X2