American Power Conversion VS 50, VS 100 Counter Electro-Motive Force Cemf Cell Connections

Figure 2.4-1 Battery Cable Connection Locations

Battery Temperature Probe Installation

The 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. Plug the connector end of the temperature probe into J410 of the backplane card. Route the cable as required positioning the probe on the selected battery cell. Remove the adhesive protection strip from the probe body and press the adhesive side of the probe on the battery cell cover. Refer to Figure 2.4-2 for details.

Note: Program Hardware Battery Temperature Alarm to “Ignore” if no battery temperature probe is connected to J410.

Battery

Temperature

Probe Connector

J410 (Rear Cover

Removed)

Figure 2.4-2 Battery Temperature Probe Installation

2.5.Counter Electro-Motive Force (CEMF) Cell Connections

WARNING: Hazardous energy levels are present on the CEMF connection area of the plant. Accidental shorting of conductors can cause arcing and high currents that can cause serious burns or other physical harm.

In some applications, a CEMF cell is used to lower the dc voltage delivered to the loads. The CEMF cell is mounted externally to the Magnum VS. The CEMF connections are located at the rear of the unit as shown in Figure 2.5-1. Two bus-plates, installed at the factory, bypass the CEMF connection. If a CEMF cell will be used, remove the bus plate connecting the two CEMF connection points and install two connection buses before installing the CEMF. The CEMF connection buses each provide a pair of #10-32 studs on 5/8” centers for connecting two- hole CEMF cable lugs. A ring size of 6 mm may also be used. Connect the CEMF cables as applicable using #10- 32 nuts.

Magnum VS –48 Vdc User Manual Page 13