The CU310-2 is an S120 single axis control unit capable of controlling PM340 Power Modules. The CU310-2 clips onto the front of a PM340 and cannot be used without a Power Module. The CU310-2 is an updated version of the CU310 with additional interfaces and the latest software features via updated firmware.
Two versions of Control Unit are available:
- CU310-2DP - Profibus interface available with firmware v4.4 onwards.
- CU310-2PN - Profinet interface available with firmware v4.4 onwards.
Technical specification and wiring details for single axis Control Units are available in the S120 AC Drive Manual which can be downloaded from Siemens support article 58122400.
The CU310-2 interfaces are as follows:
The analogue input is capable of evaluating the following input ranges:
The analogue input should be wired with a shieled twisted pair and the shield 360° bonded to earth with a suitable metal clamp. High levels of noise on the input may cause drive faults as well as poor performance. When +4mA to +20mA is selected the threshold for a wire breakage fault can be set.
The encoder interface is similar to an SMC30 but is not capable of evaluating SSI with HTL/TTL incremental data.
The PM340 is able to power the CU310-2 via internal connections but it is highly recommeneded that a separate 24V supply is used as shown in the example drawing aboveto keep the CU310-2 powered on if the mains supply is removed.
A BOP20 can be mounted on the front of the CU310-2 for basic parameter modification and display of fault codes.