Hirschmann ACA21-M12 EEC Technical Selection Guide for IP67 M12 Switch Configuration Backup and Fast Device Replacement
Hirschmann ACA21-M12 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.
The official Belden catalog identifies product code 943913003, 64 MB storage, a M12, 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.
Why the M12 and IP67 format matters
With its M12 connection and IP67 reference, Hirschmann ACA21-M12 EEC is aimed at installations where a sealed adapter format is preferred. Environmental suitability still depends on correct mating, mounting and enclosure practice.
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-M12 EEC. Use the Type and product code on the quotation, packaging and delivered label for final identification.
Ordering data for engineering review
| Brand / family | Hirschmann / ACA auto-configuration adapter |
| Type | ACA21-M12 EEC |
| Product code | 943913003 |
| Storage capacity | 64 MB |
| Connection | M12, USB 1.1 |
| Cable / format | 50 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 | 70 g |
| Protection class | IP67 |
| MTBF reference | 359 years |
Commissioning and replacement workflow
For a planned replacement, Hirschmann ACA21-M12 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.
Checks before requesting a quotation
- Confirm the full Type Hirschmann ACA21-M12 EEC and product code 943913003.
- Match the physical interface: M12, 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 IP67 and the listed temperature range suit the installation.
- Include quantity, destination, required delivery date and photographs in the RFQ.
Approvals and documentation
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.
Buyer questions answered
What does Hirschmann ACA21-M12 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.
RFQ support from HKXY
Send the complete Hirschmann ACA21-M12 EEC Type, product code 943913003, switch model, firmware, quantity and delivery destination. HKXY can quote the requested model and list alternatives separately when comparison is needed.
Official catalog reference: Belden product page for Hirschmann ACA21-M12 EEC.
