Select Hirschmann Terminal Cable, M12-4pin to DB9 Part Number 943902001 by Its Four-Pin M12 Interface and Two-Metre Length Before Connecting a Maintenance Computer to a Compatible Serial Console
Hirschmann Terminal Cable, M12-4pin to DB9 Part Number 943902001 provides a local serial terminal connection between a compatible network device and a computer. Its M12 four-pin device connector distinguishes it from the eight-pin version, even though both are described as M12-to-DB9 terminal cables.
| Product reference | Hirschmann Terminal Cable, M12-4pin to DB9 Part Number 943902001 |
|---|---|
| Device-side connection | M12, 4-pin |
| Computer-side connection | DB9 |
| Cable length | 2 m |
| Documented use | Terminal-emulation access to CLI or system monitor on compatible equipment |
| Operating temperature | 0 to +60 C |
| Weight | 130 g |
| Part number | 943902001 |
Count the pins before comparing the price
An order for Hirschmann Terminal Cable, M12-4pin to DB9 Part Number 943902001 should retain the four-pin detail. An M12 shell size alone does not define the console interface, and the separate eight-pin terminal cable is not an equivalent selected simply by choosing a similar connector description.
Set up the maintenance connection deliberately
- Identify the equipment model and the correct serial service port.
- Check the required terminal-emulation settings in the device documentation.
- Confirm the computer's DB9 serial interface or an appropriate separate adapter.
- Place the computer within the two-metre cable route without tension at either end.
Use Hirschmann Terminal Cable, M12-4pin to DB9 Part Number 943902001 only with an interface documented as compatible. The cable is a service accessory, not a universal M12 Ethernet lead or a substitute for a device's normal operational network connection.

Hirschmann networking equipment reference photograph. The accessory or power supply described on this page is not represented by an exact product photograph.
The two-metre reach of Hirschmann Terminal Cable, M12-4pin to DB9 Part Number 943902001 should be checked against actual cabinet access. Door movement, cable ducts and the position of the maintenance workstation can consume usable length even where the straight-line distance appears short.
Troubleshooting without changing the wrong thing
If a terminal session through Hirschmann Terminal Cable, M12-4pin to DB9 Part Number 943902001 is unreadable or silent, verify the selected computer port and the documented serial parameters before assuming the cable is defective. Keep access attempts within the site's authorized maintenance procedure.
A laptop without a suitable DB9 interface needs an additional compatible connection arrangement for Hirschmann Terminal Cable, M12-4pin to DB9 Part Number 943902001. That separate accessory and its software requirements should be tested ahead of a time-limited service visit.
Identify Hirschmann Terminal Cable, M12-4pin to DB9 Part Number 943902001 with part number 943902001 in the purchasing record and service-kit inventory. State that the request is for the two-metre, four-pin cable so it remains distinct from the 1.5 m eight-pin option and the five-metre RJ11 version.
Manufacturer specification: Hirschmann Terminal Cable, M12-4pin to DB9 Part Number 943902001
