UXBM Harness and Tab Washer Installation
4200-088
9-15
Revision 1.03
Figure 20 - Proper Connection Method with Disconnect Switch
CAUTION:
If the battery system utilizes a disconnect switch within the string, never connect any
wire across this switch that belongs to one UXBM. The UXBM’s are rated for an operating voltage of
95VDC max and if connected across an open switch on a battery, the entire battery voltage could be
present across the open switch if the charging circuit is still energized. This will result in permanent
damage to the UXBM.
WARNING
: Never disconnect an interconnecting strap or cable while the UXBM’s are connected
across the section being disconnected. The UXBM’s are rated for an operating voltage of 95VDC max and
if connected across an open circuit on a battery, the entire battery voltage could be present across the
open connections if the charging circuit is still energized. This will result in permanent damage to the
UXBM.
Intertier or Inter-row Connections
The UXBM can be connected to monitor the resistance of intertier or inter-row cables. If the system
being installed is performing a combined type resistance measurement (using sense lead harness 1102-
190), then each UXBM can monitor only one cable. If the system is performing discrete type resistance
measurements (using sense lead harness 1102-191), then there can be one cable per cell because every
interconnect between cells is already connected and being measured. When using the discrete type
resistance measurement, no special installation requirements are needed and only the software will
need to be configured to identify where these special cables are located.
