Chapter 3 Electrical Installation 31
NX UPS Single Module And Parallel System 250kVA ~ 800kVA User Manual
3.2.3 BCB Port
Ports J15, J19, J20, J21, J29, J30, J31 and J32 are BCB ports. The ports are shown in Figure 3-12 and described in
Table 3-4. J15 and J32, J19 and J31, J21 and J29, J20 and J30 constitute four groups of independent BCB ports
respectively. For single module or parallel system, only J15 and J32 are needed, other signals are invalid.
4 3 2 1
5 4 3 2 1
GND
GND
+12V
GND
J29, J30, J31, J32
J15, J19, J20, J21
Figure 3-12 BCB port
Table 3-4 Description of BCB port
Port
Pin
Name
Description
Remark
1
BCB_DR
BCB driver signal
2
BCB_ST
BCB state signal
3 GND
Common
ground
J15, J19, J20, J21
4
BCB_ON
BCB on line signal
1 GND
Common
ground
2
TMP_BAT
Battery temperature
Only J32 is valid
3 12V
Power
4 GND
Common
ground
J29, J30, J31, J32
5
BAT_PE
Battery ground fault signal
Pins 4 and 5 have been shorted in factory
3.2.4 Output Dry Contact Port
Ports J13, J14, J25 and J33 are output dry contact ports. The ports are shown in Figure 3-13 and described in
Table 3-5. The rated capacity of the output dry contacts is 240Vac/24Vdc, 5A.
Warning
The voltage of the dry contact signals connected to the J13, J14, J25 and J33 output dry contact ports may be dangerous. Before
connection, make sure that you are connecting the cable to the right port.
J13, J14, J25, J33
4 3 2 1
Figure 3-13 Output dry contact port
Table 3-5 Description of output dry contact port
Port
Pin
Name
Description
2
MFP_O
Rectifier backfeed normally open contact. Open when there is no backfeed
3
MFP_S
Rectifier backfeed common contact
J13
4
MFP_C
Rectifier backfeed normally closed contact. Closed when there is no backfeed
2
INV_O
Inverter state normally open contact. Open when the inverter is normal
3
INV_S
Inverter state common contact
J14
4
INV_C
Inverter state normally open contact. Closed when the inverter is normal
2
BFP_O
Bypass backfeed normally open contact. Open when there is no backfeed
3
BFP_S
Bypass backfeed common contact
J25
4
BFP_C
Bypass backfeed normally closed contact. Closed when there is no backfeed
2
MAIN_O
Rectifier input state normally open contact. Open when the rectifier is abnormal
3
MAIN_S
Rectifier input state common contact
J33
4
MAIN_C
Rectifier input state normally closed contact. Closed when the rectifier is normal
