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Electrical Connections—UPS
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3.4 Dry Contacts
The UPS provides input dry contacts and output dry contacts on the Auxiliary Terminal Block (ATB).
3.4.1 Input 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 1mm
2
for a
maximum connection length between 82 and 165ft. (25-50m). The ATB has several input dry contacts.
Figure 17 Input dry contacts
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
+12V
J9
-
+12V
BAT_READY
ENV_DET
BAT_GND
BAT_OUT
+12V
BAT_IN
J4
GND
GND
EXT_OUT
Q2BP
Q3BP
J5 J8
GND
ONLINE
BCB_IN
DRIVER
12V
12V
12V
NOTE: The black square () on each connector indicates Pin 1.
Refer to Figure 16 for the location of connectors J4, J5, J8 and J9.