Liebert NX 10kVA, Installation Manual

Page: 21 / 68

Electrical Connections
15
2.3 Dry Contacts
The UPS provides input dry contacts and output dry contacts.
2.3.1 Input Dry Contacts
There are several input dry contacts at the X3 slot.
Figure 8 Input dry contacts
2.3.2 Maintenance Bypass Cabinet Interface
J26 and J30 are the MBC interface.
Table 1 Input dry contacts at X3
Position Name Description
J4.1 ENV
3
Battery Room Alarm (N.C.)
J4.2 BtG Battery Ground Fault Detection (N.C.)
J4.3 GEN
1,2
Generator Join Detection (N.O.)
J4.4 +12V +12V Power
1 - Must be configured by configuration software before becoming active.
2 - When activated, the charger current can be limited, via software, to a percentage of the full charger current (0-100%).
3 - Activating this feature turns the battery charger off.
Table 2 Maintenance bypass cabinet interface
Position Name Description
J26.1 T_IT
1
Input transformer over temperature (N.C.)
J26.2 AUX_I Reserved
J26.3 +12V +12V Power
J26.4 GND Power Ground
J30.1 FUSE Reserved
J30.2 F_FAN Fan Fail Alarm (N.C.)
J30.3 T_OT
1
Output Transformer Overtemperature (N.C.)
J30.4 AUX_O Reserved
1 - Must be configured by software before becoming active
NOTE
All auxiliary cables of terminal must be double insulated. Wire should be 16-20AWG stranded.