Siemens CU240E-2 User Manual

Installing
3.3 Terminal strips on CU240B-2 Control Units
CU240B-2 and CU240E-2 Control Units
Compact Operating Instructions, 01/2017, A5E39910322B AA
11
3.3
Terminal strips on CU240B-2 Control Units
Terminal strips with wiring example
Figure 3-2 Wiring example of the digital inputs with the internal inverter 24 V power supply
All terminals labelled with reference potential "GND" are connected internally in the inverter.
Reference potential "DI COM" is electrically isolated from "GND".
→ if, as described above, you use the 24-V power supply from terminal 9 to supply the digital
inputs, then you must connect "GND" with "DI COM" at the terminals.
When an optional 24-V power supply is connected to terminals 31, 32, the Control Unit
remains in operation even after the Power Module has been disconnected from the line
supply. The Control Unit thus maintains the fieldbus communication, for example.
→ At terminals 31, 32, only connect a power supply that is in accordance with SELV (Safety
Extra Low Voltage) or PELV (Protective Extra Low Voltage).
→ if you also wish to use the power supply at terminals 31, 32 for the digital inputs, then you
must connect "DI COM" and "GND IN" with one another at the terminals.
You may use the internal 10V power supply or an external power supply for the analog input.
→ If you use the internal 10 V power supply, you must connect AI 0- to GND.

Siemens CU240E-2 Specifications

General

Digital Inputs	6
Digital Outputs	3
Analog Inputs	2
Protection Class	IP20
Output Frequency	0 - 650 Hz
Protection Features	Overvoltage, undervoltage, overcurrent, short circuit, overtemperature
Control Mode	Vector control, U/f control
Ambient Temperature	0 - 50 °C