M12 4-Pin Female Right-Angle Connector – for industrial sensors and automation systems

M12 4-pin female right-angle connector for field wiring onto a cable – socket (female connector), A-coded, with screw terminals. The wires are screwed into the terminals, no soldering needed, and the connector takes cables with a diameter of 4–6 mm. The cable exits the connector at 90°.

Application

The A-coded M12 4-pin socket mates with an A-coded M12 4-pin plug – including sensors, but also other automation devices with this type of connector.

Suitable for M12 sensors with a 4-pin plug and a PNP or NPN output – with one output or with two outputs, NO and NC (NO output on pin 4, NC on pin 2). The socket screws onto the sensor's plug.

The connector is made to IEC 61076-2-101 (A-coded), so it also fits other brands' sensors and devices with an A-coded M12 plug.

Pin assignment – M12 4-pin, socket

Pin	Function in the sensor	Wire colour
1	supply + (L+)	brown (BN)
2	second output (NC)	white (WH)
3	supply 0 V (L−)	blue (BU)
4	output (NO)	black (BK)

View of the contact side. The pin assignment and wire colours comply with IEC 60947-5-2, the standard used for connecting proximity sensors of different brands – Nexotec sensors and cables follow it too. In other devices, the pin functions are defined in their documentation.

Installation and operating conditions

Cable: diameter 4–6 mm, conductors up to 1.5 mm². Connection: screw terminals. The wires are clamped with slotted screws (flat-blade screwdriver). Coupling nut tightening torque: 0.6 Nm. The connector achieves IP67 when plugged in and with the coupling nut tightened. Operating temperature: −40…+85 °C.

Technical data

• Connector: M12, 4 pins, A-coded, socket (female), right-angle 90°
• Dimensions: length 42 mm, height 36 mm
• Connection: screw terminals, conductors up to 1.5 mm², cable 4–6 mm
• Rated voltage: 250 V AC/DC
• Rated impulse voltage: 2500 V
• Rated current: max. 4 A (40 °C)
• Degree of protection: IP67 (when tightened)
• Operating temperature: −40…+85 °C
• Mating cycles: at least 100
• Materials: PA housing, NBR seal, gold-plated copper contacts, nickel-plated copper metal parts
• Shielding: none
• Connector standard: IEC 61076-2-101

Frequently asked questions

Does the connector need soldering?
No. The wires are screwed into the screw terminals.

Are any tools needed for installation?
Yes – a flat-blade screwdriver. The wires are clamped in the terminals with slotted screws.

Which cable fits the M12 connector?
A cable with a diameter of 4–6 mm and conductors up to 1.5 mm².

How do I connect a sensor to the M12 4-pin connector?
According to IEC 60947-5-2: pin 1 – supply + (L+), pin 2 – second output (NC), pin 3 – supply 0 V (L−), pin 4 – output (NO).

Is it suitable for an NPN sensor?
Yes. The pin assignment is the same for PNP and NPN sensors.

Is the connector sealed?
Yes – IP67, once the connector is plugged in and the coupling nut is tightened.

Is the connector shielded?
No, it is an unshielded connector.

How many times can the connector be mated?
The connector withstands at least 100 mating cycles.

Is there a ready-made cable with this connector?
Yes – we offer M12 4-pin cables with a factory-moulded socket: straight and right-angle, PUR or PVC, 3 m and 5 m, also with LEDs. Then there is no need to assemble the connector.

What other versions are available?
M12 4-pin connectors are also available as: male right-angle (F12-4MR); female straight (F12-4S); male straight (F12-4MS).