
Electrical Connections
3.3Dry Contacts
The UPS provides input dry contacts and output dry contacts.
NOTE
When operating the Liebert® NX™ with dry contacts, ESD measures must be taken or the contacts may be damaged.
3.3.1Input Dry Contacts
There are several input dry contacts at the X3 slot.
Figure 6 Input dry contacts
+12V
+12V
+12V
+12V
X3
J4
J26
J30
J10
+12V | GEN | BtG | ENV | GND | +12V | AUX I | T IT | AUX 0 | T 0T | F FAN | FUSE | OL | GND | FB | DRV |
NOTE: The black square () on each slot indicates Pin 1.
Table 1 | Input dry contacts at X3 | |
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Position | Name | Description |
J4.1 | ENV3 | Battery Room Alarm (Normally Closed) |
J4.2 | BtG | Battery Ground Fault Detection (Normally Closed) |
J4.3 | GEN1,2 | Generator Detection (Normally Open) |
J4.4 | +12V | +12V Power |
1 - Must be configured using configuration software before becoming active.
2 - When activated, the charger current can be limited, via software, to a percentage of the full charger current
3.3.2Maintenance Bypass Cabinet Interface
J26 and J30 are the MBC interface.
Table 2 Maintenance bypass cabinet interface
Position | Name | Description |
J26.1 | T_IT1 | Input transformer over temperature (N.C.) |
J26.2 | AUX_I | Reserved |
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J26.3 | +12V | +12V Power |
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J26.4 | GND | Power Ground |
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J30.1 | FUSE | Reserved |
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J30.2 | F_FAN | Fan Fail Alarm (N.C.) |
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J30.3 | T_OT1 | Output Transformer Overtemperature (N.C.) |
J30.4 | AUX_O | Reserved |
1- Must be configured using configuration software before becoming active.
NOTE
All auxiliary cables of terminal must be
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