Signal Field Guide
FIELD REFERENCE / PINOUTS

Know the pinout
before the cut.

Standardized pin assignments, wire colors, and bench-tested multimeter procedures for M12 and M8 circular industrial connectors.

IEC 61076 REFERENCE MATRIX

Pin numbering flips across male and female faces. Verify against standardized schematics before troubleshooting sensor drops or communication faults.

7 Standards Covered
100% Bench Verified
0.6 Nm Standard Torque
8 standardized connectors
Sensors & Actuators IEC 61076-2-101

M12 A-Coded 4-Pin Connector

Pin 1 is +24V (Brown), Pin 2 is NC/Signal 2 (White), Pin 3 is 0V (Blue), Pin 4 is NO/Signal 1 (Black).

4 Pins 250 V AC/DC 4 A per contact IP67 / IP68 (when properly torqued with intact O-ring)
Wire sequence:
View Pinout & 3-Step Meter Tests →
Sensors & Actuators IEC 61076-2-101

M12 A-Coded 5-Pin Connector

Pin 1 is +24V (Brown), Pin 2 is White, Pin 3 is 0V (Blue), Pin 4 is Black, Pin 5 is Gray/Earth (Center).

5 Pins 60 V AC / 60 V DC 4 A per contact IP67 / IP68
Wire sequence:
View Pinout & 3-Step Meter Tests →
Industrial Ethernet IEC 61076-2-101

M12 D-Coded 4-Pin Connector

Pin 1 is Yellow (Tx+), Pin 2 is White (Rx+), Pin 3 is Orange (Tx−), Pin 4 is Blue (Rx−). Shell is 360° Shield.

4 Pins 250 V AC/DC 4 A per contact IP67 / IP68
Wire sequence:
View Pinout & 3-Step Meter Tests →
Industrial Ethernet IEC 61076-2-109

M12 X-Coded 8-Pin Connector

4 isolated shielded quadrants. Pairs 1-2 (White-Orange/Orange), 3-4 (White-Green/Green), 5-6 (White-Brown/Brown), 7-8 (White-Blue/Blue).

8 Pins 48 V AC / 60 V DC (supports PoE / PoE+ IEEE 802.3at) 0.5 A per contact IP67 / IP68
Wire sequence:
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Fieldbus IEC 61076-2-101

M12 B-Coded 5-Pin Connector

Pin 1 is +5V Supply, Pin 2 is Line A (Green), Pin 3 is 0V Ground, Pin 4 is Line B (Red), Pin 5 is Shield.

5 Pins 60 V AC / 60 V DC 4 A per contact IP67 / IP68
Wire sequence:
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Power Delivery IEC 61076-2-106

M12 L-Coded 5-Pin Connector

Pin 1 is +24V P1 (Brown), Pin 2 is 0V P2 (White), Pin 3 is 0V P1 (Blue), Pin 4 is +24V P2 (Black), Pin FE is Earth (Gray).

5 Pins 63 V DC 16 A per contact (continuous) IP67 / IP69K
Wire sequence:
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Sensors & Actuators IEC 61076-2-104

M8 A-Coded 3-Pin Connector

Pin 1 is +24V (Brown), Pin 3 is 0V (Blue), Pin 4 is Switched Output (Black). Pin 2 is intentionally omitted.

3 Pins 60 V AC / 60 V DC 3 A per contact IP65 / IP67
Wire sequence:
View Pinout & 3-Step Meter Tests →
Sensors & Actuators IEC 61076-2-104

M8 A-Coded 4-Pin Connector

Pin 1 is +24V (Brown), Pin 2 is Output 2/NC (White), Pin 3 is 0V (Blue), Pin 4 is Output 1/NO (Black).

4 Pins 30 V AC / 30 V DC 3 A per contact IP65 / IP67
Wire sequence:
View Pinout & 3-Step Meter Tests →
FIELD TROUBLESHOOTING

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