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

33

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Emerson 15-90KVA, 115-120, 115-208 Input Dry Contacts, Description of dry contact input port, Position Name Description
Page 42 Page 44

115-600V, 115-208, 115-120, 115-50/60HZ, 115-480 specifications

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