904.2 Wiring with external battery modular (EBM)External battery modular (EBM) is UPS’s optional modular, it can provide more DCpower for UPS.1. Be sure to disconnect the battery cable from the EBM before connectingthe battery terminals of the UPS2. Make sure the UPS is completely off before connecting or disconnectingthe EBM.3. Before connecting the EBM, make sure that the number of batterysections and capacity are the same as LCD setting.4. Do not reverse the polarity of the external battery.EBM wiring schematic diagram is shown below:Sigle string EBM Multiple strings EBM• Battery cable installation sequence: connect UPS first, then connect EBM!• Default battery number of the UPS is set with:9SX15-20KPM: 32pcs, 16 pcs for Battery+/Battery- (EBM-1/EBM-2).9SX15-20KPMAU: 40pcs, 20 pcs for Battery+/Battery- (EBM-1/EBM-2).DXRT15-20KS-IN: 32pcs, 16 pcs for Battery+/Battery- (EBM-1/EBM-2).• The UPS can expand up to 6 strings EBM, each string contains 2EBM(batt+/batt-).• The external battery interface of the UPS only needs to remove the 'topcover of the TB' during the wiring, no need to remove the 'TB box'。