Power supply (X102)

To supply the CU81x0 UPS, two 9-pin connectors with push-in connection are used. For the 9-pin connectors, cables with a cross-section of 0.5 mm² to 1.5 mm² or AWG20 to AWG16 are required. With cable end sleeve max. 1 mm2 or AWG 17 are permissible.

Power supply X102, connection on left side.
No.	Pin	Description
1	Uin, 0V, PE	+24 V DC input, power supply for UPS.
2	U1out, 0V, PE	+24 V DC UPS output with UPS-OCT support, interface for the device being supported.
3	U2out, 0V, PE	+24 V DC UPS output, interface for a second device being supported e.g. control panel (display).

The U1out and U2out interfaces together must not exceed the maximum output current of the UPS.

Power supply X102, right-hand connection.
No.	Pin	Description
4	UPS RDY, 0V, PE	+24 V DC output. This output is switched to 24V when the UPS charging is above a set threshold (e.g. 80 %).
5	P FAIL, 0V	+24 V DC output for power-fail-signal. This output is switched to 24 V if the power supply fails or if P SHDN is activated. This output can be connected with the PC_ON input on a Beckhoff Industrial PC or any PLC input.
6	NC NC	Reserved.
7	UPS EN	+24 V DC input. A falling edge from 24 V to 0 V signals the UPS to switch off the outputs U1out and U2out immediately. This input can be connected with the PC_STATUS output on a Beckhoff Industrial PC or any PLC output.
8	P SHDN	+24 V DC input. A rising edge from 0V to 24V at this input triggers an immediate shutdown of the operating system. If there is 24 V at P_SHDN on startup, the PC will first be started with a falling edge from 24 V to 0 V.