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What is the pin assignment of M12 D Code to X Code adapter ?
Publish:
2025-08-15 11:37
Source:
Premier Cable
What is the pin assignment of M12 D Code to X Code adapter ?
M12 D-code to X-code adapter allows a connection between an 8-pin X-coded M12 connector (used for high-speed Gigabit Ethernet) and a 4-pin D-coded M12 connector (used for 100Mbps Ethernet). The adapter effectively bridges the gap by remapping the signals from the 8 pins of the X-code connector to the 4 pins of the D-code connector, allowing Gigabit devices to connect to Cat5 cabling.
Pin Assignment :
M12 D-code (4-pin) :
Pin 1: Transmit Data + (TD+)
Pin 2: Receive Data - (RD-)
Pin 3: Transmit Data - (TD-)
Pin 4: Receive Data + (RD+)
M12 X-code (8-pin) :
The specific pin mapping to the D-code will depend on the adapter and the intended use case, but generally, it will involve mapping the four data pairs (2 per pair) from the X-code connector to the corresponding four pins of the D-code connector. Some adapters may also provide shielding connections.
Adapter Functionality :
The adapter essentially takes the two twisted pairs from the X-code connector (which can handle Gigabit speeds) and maps them to the two twisted pairs in the D-code connector, allowing a Gigabit device to communicate over a slower Cat5 network.
The D-code M12 is limited to 100Mbps, while the X-code M12 can handle Gigabit speeds. The adapter allows the connection, but the overall speed will be limited by the D-code's capabilities.
Premier Cable Compatibility :
IFM: E80412 / PCM-S-0677
Provertha: 42-900167 / PCM-S-0678
SIEMENS: 6GK1901-0DE10-6AA0 / PCM-0855
SIEMENS: 6GK1901-0DE20-6AA0 / PCM-0856

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What is the role of M12 D Code to X Code Adapter ?
M12 D-Code to X-Code adapter for Profinet to Ethernet in industrial use
What is the pin assignment of M12 D Code to X Code adapter ?
M12 connector D-code to X-code are commonly used in industrial environments for Ethernet, Profinet connectivity, Full Compatible with IFM, Provertha, SIEMENS
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