IEC metric screw sized connectors

Series of electrical connectors From Wikipedia, the free encyclopedia

IEC metric screw sized connectors is a family of electrical connectors defined by IEC that are named according to their ISO metric screw thread, namely M5, M8 and M12.[1] The number gives their outer screw thread diameter in millimeters as with the identically named screws. However, the connectors are further classified by a so-called coding, denoted by one or more letters, which defines things like pin layout, shape of connecting surfaces and electrical properties.[2][3]

M12 A-coded 5-pin connector.
Ethernet cable with an M12 X-coded connector on one end and a modular connector on the other.

The many types are partly to prevent incorrect connection.[2] The larger connector sizes are the most varied, with designated connectors ranging from analog and digital signals to AC and DC power.[4]

Each "coding" has a different keyway that prevents incorrect connection between incompatibly keyed connectors.[5]

The connectors on the ends of cables have a freely rotating screw threads that are turned to screw the plug into its mating socket, while the connectors attached to equipment have fixed screw threads that do not rotate. This means two panel-mount connectors will not fit together as they cannot be screwed in, however two cables are able to be joined together. The gender does not affect this arrangement - both male and female panel-mount connectors are fixed, and both male and female cable ends have freely rotating screw threads.

Major uses include factory automation and transportation.[2] Products can be designed for high weather and chemical resistance (high IP rating)[2] as well as mechanical durability.[1]

Standard listing

Variants

All variants permit one or more pins to be removed to create differently keyed connectors.[7] For example any pin in a 6-pin connector could be removed, to make six different, incompatible 5-pin connectors.

More information Coding, Pins ...
M5
CodingPinsDiagramUses
A3[8]Signal[4]
4[8]
Close
More information Coding, Pins ...
M8
CodingPinsDiagramCurrent ratingVoltage ratingUses
A3[7]3 A60 Vac/dcSignal, Ethernet[4]
4[7]30 Vac/dc
6[7]1 A
8[7]
B5[7][9]3 A30 Vac/dcDeviceNet[4]
C12[7]
D4[4]Profinet[4]
P4[9]
Close
M12 T-coded 2-pin connectors. Left, panel mount female socket. Right, inline male plug. The screw thread on the inline connectors can be freely moved regardless of gender, while the threads on the panel mount connectors are always fixed.
More information Coding, Pins ...
M12
CodingPinsDiagramCurrent ratingVoltage ratingUses
A2[10][6]4 A250 Vac/dcDC power, sensors, actuators, 1 Gb/s Ethernet[3][1]
CANopen, DeviceNet, Profibus PA[4]
3[7][6]
4[7][6]
5[7][6]2 A60 Vac/dc
6[7][6]30 Vac/dc
7[7][6]
8[7][6]
9[7][6]1.5 A
10[7][6]
11[7][6]
12[7][6]
13[7][6]
14[7][6]
15[7][6]
16[7][6]
17[7][6]
B5[6]2 A60 Vac/dcNon-Ethernet Fieldbus connections, commonly Profibus DP[3][1][4]
C3[7]AC power, including motor connections[3]
4[7]
5[7]
6[7]
D4[7][6]4 A250 Vac/dcIndustrial Ethernet protocols such as Profinet and EtherNet/IP; only Fast Ethernet (100 Mb/s) because of its two wire pairs.[3]
E2 + FE[11]
3 + FE[11]
4 + FE[11]
F2[11]DC power
3[11]
4[11]
FO2 optical + 2 electric
H8[12]--
K2 + PE[11]16 A600 VacAC power (single phase)
3 + PE[11]AC power (3-phase delta)
4 + PE[11][13]AC power (3-phase wye)[13]
L2[11]12 A
16 A		63 VdcDC power
2 + FE[11]
3[11]
3 + FE[11]
4[11]
4 + FE[11][13]
M2 + PE[11]8 A600 VacAC power (single phase)
3 + PE[11]AC power (3-phase)
4 + PE[11]AC power (3-phase delta)[13]
5 + PE[11][13]3-phase motor + auxiliary wire pair[13]
P4 + PE[11]AC power (three phase)
S2 + PE[11][13]12  A300 VacAC power (single phase)[13]
3 + PE[11][13]600 VacAC power (3-phase delta)[13]
T2[11]12 A60 VdcDC power[13]
3[11]
4[11][13]
X8[12][6]--10 Gb/s Ethernet[3][1][6]
Y8[6]Power + 100 Mb/s Ethernet[6]
Close

References

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