Hirschmann ACA21-USB EEC Product Guide for USB 1.1 Managed Switch Configuration Storage, Commissioning and Replacement
Hirschmann ACA21-USB EEC is an industrial auto-configuration adapter intended to support managed-switch commissioning, configuration backup and replacement. It stores switch configuration data and operating software so maintenance teams can prepare a controlled device-change workflow without treating a visually similar adapter as interchangeable.
Core identification and order code
| Brand / family | Hirschmann / ACA auto-configuration adapter |
| Type | ACA21-USB EEC |
| Product code | 943271003 |
| Storage capacity | 64 MB |
| Connection | USB Type A, USB 1.1 |
| Cable / format | 20 cm |
| Power supply | Powered through the USB interface |
| Operating temperature | -40 to +70 °C reference |
| Storage temperature | -40 to +85 °C reference |
| Relative humidity | 10–95%, non-condensing reference |
| Weight | 50 g |
| Protection class | IP20 |
| MTBF reference | 359 years |
The official Belden catalog identifies product code 943271003, 64 MB storage, a USB Type A, USB 1.1 connection and an extended operating-temperature reference of -40 to +70 °C. These values are procurement references; the current datasheet and the target switch documentation remain decisive.
Reference image notice: this is a shared Hirschmann industrial-networking stock image. The visible device label may show another Hirschmann model, so it is not an exact photograph of Hirschmann ACA21-USB EEC. Use the Type and product code on the quotation, packaging and delivered label for final identification.
When the USB Type A version is relevant
Hirschmann ACA21-USB EEC uses a USB Type A interface and a 20 cm cable. Its IP20 reference suits protected installation contexts rather than exposed field mounting; evaluate cabinet conditions and handling practice before selection.
Information to capture from the installed network
- Confirm the full Type Hirschmann ACA21-USB EEC and product code 943271003.
- Match the physical interface: USB Type A, USB 1.1; do not select only by storage capacity.
- Check that the target switch and its software release support the selected ACA generation.
- Record the existing switch model, firmware version, network role and current adapter label.
- Confirm whether IP20 and the listed temperature range suit the installation.
- Include quantity, destination, required delivery date and photographs in the RFQ.
Configuration backup context
For a planned replacement, Hirschmann ACA21-USB EEC should be evaluated together with the managed switch, firmware, stored configuration, connector style, environmental conditions and commissioning procedure. Saving a configuration does not by itself validate network design or application compatibility.
Common purchasing questions
What does Hirschmann ACA21-USB EEC store?
Belden documentation states that the adapter can retain two versions of configuration data and operating software from the connected switch.
Can it be selected only by connector appearance?
No. ACA21 and ACA22 products differ in storage generation and USB version, while M12 and USB variants also differ in connection and protection. Verify the complete Type and product code.
Does the adapter remove the need to check switch compatibility?
No. Compatibility, software release, configuration process and project approvals should be confirmed for the actual switch and network before ordering or replacement.
Certification note
Catalog approval references include cUL508, Class 1 Division 2 / ATEX Zone 2, DNV and EN 50121-4 references. Approval applicability varies by hardware revision, installation country and project, so certificates should be checked against the exact product code before use.
Requesting a quotation
For Hirschmann ACA21-USB EEC, provide product code 943271003, the connected switch, software release, quantity and delivery requirement. This helps distinguish it from M12 and ACA22 variants.
Official catalog reference: Belden product page for Hirschmann ACA21-USB EEC.
