Power supply
An external power supply unit is required to supply the UPS with a 24 V DC voltage (-15 % / +20 %). Connect the external power supply unit to the UPS Uin input. Connect the loads to the outputs U1out and U2out.
Do not wire the UPS and loads during operation and always in the switched-off state.
Two 9-pin connectors with push-in connection are used to wire the CU81x0 UPS. Copper cables with a cross-section of 0.5 mm² to 1.5 mm² or AWG20 to AWG16 are required for the 9-pin connectors. A maximum of 1 mm2 or AWG 17 is permissible with ferrules.
Wire the UPS in the control cabinet in accordance with the standard EN 60204-1:2006 PELV = Protective Extra Low Voltage:
- The "PE" and "0 V" conductors of the voltage source for a UPS must be at the same potential (connected in the control cabinet).
- Standard EN 60204-1:2006, section 6.4.1:b stipulates that one side of the circuit, or one point of the energy source for this circuit must be connected to the protective conductor system.
The CU81x0 UPS can be used in areas where special UL requirements must be met. Applications without special UL requirements are not affected by UL regulations.
UL requirements:
- An external overcurrent protection of 20 A is required for the UPS input (Uin).
- The temperature resistance of the copper cables must be at least 70 °C.
Selecting the appropriate power supply unit
Dimension the power supply unit according to the maximum power consumption of the connected devices including the current consumption when charging the UPS. If, for example, a CX5140 with a power consumption of 23 W (= 0.96 A) is connected, the calculation looks as follows: 0.96 A + 3.2 A = 4.16 A. In this calculation example, at least a 4.16 A power supply unit is required for the CX5140.
If a C6017 (Intel Atom® x5-E3930 1.3 GHz) with a power consumption of 14 W (= 0.58 A) is connected, at least a 3.78 A power supply unit is required: 0.58 A + 3.2 A = 3.78 A.
Technical data | CU8110-0120 |
|---|---|
Power consumption during charging (without load) | max. 3.2 A |
Output current | max. 4.5 A |
Fuse (internal, input) | electronic 10 A |
Fuse (internal, output) | electronic 5 A |
Connect UPS
Connect the devices to be supported to the outputs U1out and U2out. If the external 24 V DC input voltage is lost, the UPS takes over the supply of the devices connected to it thanks to its regulated and buffered 24 V DC output voltage. Use the two 9-pin connectors with push-in connection to wire the CU8110-0120 UPS.
Cable cross-section | 0.5 ... 1.5 mm2, | AWG 20 ... AWG 16, |
Strip length | 8 ... 9 mm | 0.33 inch |
Connect the UPS as follows:
- 1. Open a spring-loaded terminal by lightly pressing the push mechanism with a screwdriver or a mandrel.
- 2. The wire can now be inserted into the round terminal opening without any force.
- 3. The terminal closes automatically when the pressure is relieved.
- If the DIAG LED is green, the UPS is being supplied with power. If the DIAG LED is red, the input voltage Uin is not present.
Grounding
In case of mounting on a DIN rail, the UPS is grounded by grounding springs on its rear side. Ground the DIN rail in the control cabinet accordingly. A UPS with a mounting plate (optional) is grounded via the grounding screw.