Emerson 15-90KVA, 115-120, 115-208 Input Dry Contacts, Description of dry contact input port

Electrical Connections—UPS

3.4Dry Contacts

The UPS provides input dry contacts and output dry contacts on the Auxiliary Terminal Block (ATB).

3.4.1Input Dry Contacts

External input dry contacts are connected via the ATB. Dry contacts are available for environment detection, battery ground fault detection, etc.

The UPS accepts external signal from zero-voltage (dry) contacts connected through external dry contact terminals produced, and these terminals are on the static bypass assembly. Through software programming, these signals become active when these contacts connect to +12V to ground (in the most left side). The cables connected to the monitor board must be separated from power cables. Moreover, these cables should be double-insulated with a typical cross-section of 0.5 to 1mm2 for a maximum connection length between 82 and 165ft. (25-50m). The ATB has several input dry contacts.

Figure 17 Input dry contacts

+12V

J9

+12V	_READYBAT	BAT_GND	ENV_DET
	-

J4

GND BAT_OUT +12V BAT_IN

J5

GND EXT_OUT Q2BP Q3BP

12V 12V

12V

J8

ONLINE GND BCB_IN DRIVER

NOTE: The black square () on each connector indicates Pin 1.

Refer to Figure 16 for the location of connectors J4, J5, J8 and J9.

Table 5	Description of dry contact input port
Position	Name	Description
J9.1	ENV_DET	Detection of battery room environment (normally closed); On Generator; EVN
J9.2	BAT_GND	Battery short to ground detection; BtG; On Generator
J9.3	BAT_READY	Not Used
J9.4	+12V	+12V power supply
J4.1	BAT_IN	Internal battery temperature detection
J4.2	+12V	+12V power supply
J4.3	BAT_OUT	External battery temperature detection
J4.4	GND	Power supply GND

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