Liebert NXC 40kVA - Input Dry Contact Port; BCB Port

22 Chapter 3 Electrical Installation
Liebert NXC 30kVA And 40kVA UPS User Manual
Figure 3-5 Illustration drawing of communication box ports
3.2.2 Input Dry Contact Port
The input dry contact ports J1 and J2 are shown in Figure 3-6 and described in Table 3-5. The input dry contact
voltage is 12Vdc, and the current is 20mA.
Figure 3-6 Input dry contact ports J1 and J2
Table 3-5 Description of input dry contact ports J1 and J2
Silkscreen
Port
Pin No. Pin name Meanings
J1
Generator
mode input
1.1 GEN
Generator is connected. Shorted to 1.2 is normal mode,
and opened to 1.2 is generator mode
1.2 GND 1.1 and 1.2 have been shorted in factory
J2
External
maintenance
bypass switch
2.1 EXT_Q3
External maintenance bypas switch state. The auxiliary
contact requirement of the external maintenance bypass
switch: Auxiliary contact of external bypass closed upon
switch closed
2.2
GND
GND
External
output switch 2.3 EXT_OUT
External output switch. The auxiliary contact requirement
of the external output switch: Auxiliary contact of external
bypass closed upon switch closed
2.4
GND
2.3 and 2.4 have been shorted in factory
3.2.3 BCB Port
J4 is the BCB port. The port is shown in Figure 3-7 and described in Table 3-6.
Intellislot port
User dry contact port
communication port
Parallel communication port
LBS communication port
RS485 communication port
J1
J2
J3
J4 J5
RS232
USB
PARA 1
PARA 2
LBS 1
LBS 2
RS485-1
RS485-2
INTELLISLOT 1
INTELLISLOT 2 INTELLISLOT 3
USB
communication port
RS232
GND
GND GND
J1
J2
1
234
1
234
UPS inside
External ports