Emerson 40-200KVA user manual Input Dry Contacts, Maintenance Bypass Cabinet Interface

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
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 (0-100%). 3 - Activating this feature turns the battery charger off.

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
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_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 double-insulated. The wire must be 600V, 18-16 AWG stranded for maximum runs between 82 and 197 feet (25-60m), respectively.

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