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MX28B1200/2400 MX28B1200/4800 –48 VDC User’s Manual Page 13
Battery Temperature Probe Installation
The optional temperature probe is used to monitor the battery string temperature. To get the
most representative temperature measurement, the probe should be placed in contact with a
battery cell that is centrally located. The probe should be placed directly in contact with the cell
(not the frame surrounding the cell). Generally, the cell cover can be used; be careful not to
allow the probe body to touch the terminals. Remove the adhesive protection strip from the
probe body and press the adhesive side of the probe on the battery cell cover. See Figure 3.4-3
for details. Plug the connector end of the temperature probe into J5 of the control unit
backplane card. Route the cable as required positioning the probe on the selected battery cell.
See Figure 3.4-2 for Details.
Figure 3.4-2 Battery Probe Connection
Figure 3.4-3 Battery Probe Installation
3.5. DC System Grounding
The Positive Battery connection (return bus) for the power plant must be connected to the
Master Station Ground. The return bus provides 3/8” holes on 1 inch or 1-3/4 inch centers for
connection of a two-hole lugged cable to the Central Office Ground. Details for this connection
should be provided in the site electrical grounding plans.
A connection to tie the frames together is also available. At the top of both sides of the box
frame is a pair of studs for connecting a grounding cable. This #6 AWG cable is provided with
each expansion frame.