Pepperl+Fuchs Blog

Connectivity of Proximity Sensors

Posted by David Rubinski on Tue, Jun 25, 2013

Which cordsets do you use to connect inductive and capacitive proximity sensors?

Cordsets Connect Proximity Sensors

You almost always use 4-wire cordsets with either 4-wire dual output proximity sensors or single output sensors that have a functional input. For example, you could use a 4-wire cordset V1-G-BK5M-PUR-U with a 4-pin sensor such as a Pepperl+Fuchs NBB10-30GM60-A2-V1 with dual PNP output (one normally closed, one normally open). All four pins are connected to the sensor and can be connected through to the customer termination side. Connected pins include: pin 1, 2, 3, and 4.

Customers often stock only one style of cordset. In this case, 4-wire cordsets are a good general solution for both 3- and 4-wire proximity sensors. Please note that when you use 4-wire cordsets with 3-wire single output sensors, the fourth wire is not connected to the sensor and is not used on the termination side.4-wire cordsetTypically, you use 3-wire cordsets like a V11-G-BK5M-PUR-U for 3-pin single output sensors such as the PNP inductive proximity sensor NBB5-18GM50-E2-V1. The sensor has an M12 male connector and the cordset has a mating M12 female connector. Connected pins include: pin 1, 3, and 4.

3-wire cordsetStraight or Right Angle Cordset Connector Ends

Another cordset connectivity option is the use of straight or right angle connector ends. Sometimes because of space constraints or cable path routing, customers prefer right angle connectors over straight aligned connectors. Some sensors, like our NBB20-L2-A2-V1, have rotating connectors. These rotating connectors give you even more flexibility for cable routing because you can twist the connection to orient the cable into the desired path.

Straight or right angle connectorsInductive Sensors, Cordsets and Sensor I/O Junction Blocks

Another way to use 3-wire cordsets is to connect 3-wire sensors to multiport junction blocks. The multiport block lets you connect multiple 3-wire sensors via double-ended 3-wire extension cordsets. This type of connection reduces the termination wiring points and therefore reduces assembly time and cost. An example would be the V3-4A-E2-V19 multiport sensor connection block that allows four 3-wire sensors to be connected via double-ended cordsets. The multiport junction block has 4x M8 female connector points which can be connected to four different 3-wire PNP proximity sensors. Termination wiring points in this case are reduced from 3x4 = 12 points to only 6 points. This reduction is possible because the power connections are common to all sensors connected to the junction block. Obviously, you can reduce the wiring even more if you increase the I/O point count to 6 or 8 points on the block.

An M8 junction block does not limit you to only sensors with M8 mating connectors, but can also be used with M12 connector 3-wire proximity sensors. Such versatility is possible because of the dual-ended converter cables. These 3-wire cables have an M12 female connector at one end to connect to the proximity sensor connection, and an M8 male connector at the other end to connect to the multiport junction block ports. Using 3-wire cordsets in multiple lengths allows the I/O port block to be connected to sensors at various distances from the mounting location of the junction block. Typical cable lengths are 0.6 meters to 5 meters. Pepperl+Fuchs cables include the V3-GM-BK2M-PUR-U-V3-GM to connect 3-wire M8 connection sensors and the V11-G-BK5M-PUR-U-V3-GM, to connect 3-wire M12 connection sensors to multiport block V3-6A-E2-V19. In this case, the M8 male end connects to the I/O junction block.Multiport junction block

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Topics: Inductive Sensors, Cables/ Cordsets, Capacitive Sensors

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