Emerson Liebert NXL Battery Interface Box Product Specification/Installation Sheet page 3

Figure 2 Control wiring routing
Optional Motor
Operator Sense Leads
Breaker
Contacts
Leads
External Battery Room Temperature Sensor—Optional
Connecting an optional sensor to the BIB to monitor the ambient room temperature will enable the Liebert
NXL to perform temperature-compensation charging. The optional temperature sensor should be mounted in
the area that will have the highest battery ambient temperature. If multiple Battery Interface Boxes are used
with an optional temperature sensor, the UPS will report the highest temperature.
DC Sense Connections—Optional
Connecting the optional DC sense voltage wires will allow the Liebert NXL to display the DC source on the
UPS HMI. This connection cannot be used with split-battery bus systems, flywheel systems or any DC system
that does not have a valid DC voltage when the DC breaker is open.
If the DC sense wires are connected to the BIB, the DC source cabinet may require field-installed fuse
protection; refer to national and local codes to verify. The DC sense wires must run from the most-positive DC
voltage to the most-negative DC voltage
DC Breaker Undervoltage Release (UVR) Contacts
If the DC breaker is used as a Module Battery Disconnect breaker (UPS will have control of the breaker),
then the 48V UVR contacts must be run to the BIB.
If the DC breaker is used as a Battery Isolation Switch, then the 48V UVR contacts will not be run to the
BIB.
CAN Communication Connections
Belkin 9156 (or equivalent) cable must be used to run the CAN Communication Connections. If multiple
External Battery Interface Boxes are used, the CAN cables will connect in a daisy chain from the UPS EIB to
BIB #1 to BIB #2 to BIB #N.
Optional
Temp Sensor
FRONT VIEW
Knockout for
CAN Leads
Breaker Aux
Contacts Leads
TOP VIEW
BOTTOM VIEW
Optional DC
Sense Leads
3
Knockout for Optional
Knockout for
Motor Operator
Optional Temp
Sense Wiring
Sense Wiring
Knockout for
CAN Wiring
Knockout
for Optional
DC Sense
Leads