M12 Standards
M12 A-Coded, 4-Pin
DC Power
M12A Pin 1 - Excitation+
M12A Pin 2 - Ground
M12A Pin 3 - Excitation-
M12A Pin 4 - Sense+
Color Code Guidance
Not all cables include the suggested color codes.
M12A Pin 1 - Red
M12A Pin 2 - Green
M12A Pin 3 - Black
M12A Pin 4 - White
In some applications, M12 is too large. The M8 is used for smaller form-factor applications. M8 Standards
M12 A-Coded, 8-Pin
RadioBro uses M12-A 8Pin for special applications. No standard pinout is suggested.
M12 B-Coded, 5-Pin
RS485 with DC Power
M12A Pin 1 - Excitation+
M12A Pin 2 - Excitation-
M12A Pin 3 - RS485/A
M12A Pin 4 - RS485/B
M12A Pin 5 - Ground
M12 D-Coded, 4-Pin
4-pin (100 Mbps) Ethernet
M12D Pin 1 - RJ45 Pin 1 - White/Orange
M12D Pin 2 - RJ45 Pin 3 - White/Green
M12D Pin 3 - RJ45 Pin 2 - Orange
M12D Pin 4 - RJ45 Pin 6 - Green
Not used: RJ45 Pin 4, 5, 7, 8. Colors based on ANSI/TIA 568BM12 X-Coded, 8-Pin
8-pin (1+ Gbps) Ethernet
M12X Pin 1 - RJ45 Pin 1
M12X Pin 2 - RJ45 Pin 3
M12X Pin 3 - RJ45 Pin 2
M12X Pin 4 - RJ45 Pin 6
M12X Pin 5 - RJ45 Pin 7
M12X Pin 6 - RJ45 Pin 8
M12X Pin 7 - RJ45 Pin 5
M12X Pin 8 - RJ45 Pin 4
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For AC Power Reference, please review NEMA Nomenclature and wiring standards for NEMA 5-15. Refer to an electrician for more information.
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M12 S-Coded, 4-Pin
AC Power
M12S Pin 4 - Ground (Green)
M12S Pin 1 - X (Live)
M12S Pin 2 - W (Neutral)
M12S Pin 3 - Y (Unused)