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Posted on Monday 20th February 2017

3 Steps to Selecting M8 and M12 Cord Sets

Original post by Belden.  Updated/Modified by AVRGT.

1985 introduced the M8 and M12 series circular sealed interconnect system. Incorporating
the use of the smaller M12 metric thread, they were initially released in 3-and 4-pin versions,
with an IP67 rating. The M8 and M12 were standardized under IEC 61076-2-101, making
them the standard for ICS. M8, M12, M23 series connectors are excellent for high use,
harsh type environments ( Automotive, Trucking, Heavy Truck, Military, Industrial type
applications )

AVR Global Technologies can custom over-mold connectors, or provide assembled type M-series

M8 cord sets facilitate fast machine start-up time and easy maintenance.

1. Choosing the Right Cord Set – Start with the Environmental Needs
Like most engineering decisions, there’s a balance between cost and performance. You want
to choose the lowest cost option that meets the requirements of the application. For
example, you don’t need armored cable if it is going to be run in wire trays in a temperature and
humidity-controlled environment.
Thus the first question to ask, is “How harsh is the
environment for my project?” The answer to this
leads to selecting the right industrial cable
jacket and the right IP rating for the cord set.
Below is an engineering table that breaks down
the options according to the harshness of the
operational setting.

Table 1: Select a cord set based on harshness of the application’s environment.

2. Determine the Connector Configurations
Since the introduction of the 3- and 4-pin versions of the M12 connector, many more
variations and options have become available. While 4-pin M12 connectors are the most
common, be sure to analyze your application and choose from:
-- straight or right angle configurations

-- 3-, 4-, 5-, 8- and 12-pin versions
For M8 connectors your options are:
-- Straight or right angle configurations
-- Snap(IP65) or screw connection (IP67)
-- 3-, 4- and 8-pin versions

3. Select the Keying Options
The M12 connector is also available in a variety of keying/coding options to further minimize
wiring errors as follows:
-- A-code – Primarily used with sensors and actuators
-- B-code – PROFIBUS fieldbus connections
-- C-code (dual keyway) – Primarily used with AC sensors and actuators
-- D-code – 100Mb EtherNet/IP 4-pin
-- X-code – Gigabit Ethernet 8-pin
The following M8 connector configurations feature a keying/coding*:
-- B-code – PROFIBUS fieldbus connections
-- 8-pin version

CONTACT: Andy Bowman, AVR Global Technologies, Inc.,
Skype: andy.bowman99 Cell: 760-807-0036 Office: T: 949-391-1181

Tags: M8, M12, M23 series cables, sealed cables