
M8 To RJ45 Profinet Cable Assembly CAT5e Shielded Drag Chain Cable
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In certain devices, network interfaces are not always positioned in easily accessible locations. This is particularly true for compact control units or embedded systems, where RJ45 ports often need to be routed to a more convenient position for user access.
The PCM-S-0739 cable was developed specifically to address this requirement. One end features an M8 4-pin D-coded connector-a common standard for field-side connections-while the other end terminates in an RJ45 female receptacle. This effectively extends the network interface; whether this extension is mounted on the device's external housing, a front panel, or within the internal structure depends largely on the overall design of the host device.
Rather than adhering to the "static cabling" philosophy typical of standard network cables, this cable utilizes a robust CAT5e SFTP (Shielded Foiled Twisted Pair) structure, further enhanced by a TPU outer jacket. This design is optimized for environments involving internal device routing or moderate dynamic movement. Such a structure ensures greater stability in demanding applications-for instance, within cable drag chains or in scenarios requiring repeated bending and flexing.
Furthermore, the connector components are fully overmolded with TPU. This process is primarily intended to mitigate stress concentration issues that can arise during prolonged operation. For devices designed for continuous, long-term service, attention to such engineering details is often even more critical than the raw technical specifications alone.
Specifications
| Product Name | Profinet M8 Male to RJ45 Female Cable Drag Chain Rated CAT5e |
| DWG No. | PCM-S-0739 |
| Connector A | M8 4 Pin D-coded Male |
| Termination A | Solder Type |
| Connector B | RJ45 8P8C Female |
| Contact Plating | Gold Plated |
| Cable Type | CAT5e SFTP |
| Conductor | 22AWG × 4C |
| Shielding | Foil + Braid (SFTP) |
| Jacket Material | TPU (Drag Chain Grade) |
| Cable OD | 7.5 mm |
| Cable Length | 20cm or Customized |
| Cable Color | Green |
| Overmold | Black TPU |
| Application | Profinet / Industrial Ethernet |
Connector Design
The M8 end features a D-coded, 4-pin configuration-a common interface type typically found on the device side of Profinet systems. Compared to crimping, the soldered connection method offers greater stability in environments subject to vibration or under conditions of prolonged use.
The RJ45 end utilizes a standard 8P8C female socket with gold-plated contacts; this design choice is primarily intended to ensure reliable contact integrity, even after repeated insertion and removal cycles. This structural configuration facilitates easier interface breakout and device integration.
Both connectors feature an integrally molded overmolding design. The primary objective of this feature is to enhance the reliability of the transition zone between the cable and the connector, rather than serving a purely aesthetic purpose.
Profinet Application
In a Profinet system, stability often hinges on the most "ordinary" of components-the cables.
This M8-to-RJ45 Profinet cable is ideally suited for:
- High-interference environments
- Dynamic equipment
- Systems requiring RJ45 interface expansion
It is designed not merely to "connect," but to ensure that the connection remains reliable over the long term.

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