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Knowledge Base for Magnetic Field Sensors

Connection Methods


Magnetic field sensors can be electrically integrated into plants in various ways. Various sensor versions with fixed cables with plugs or with connector plugs are available in various designs as standard.


Fixed Cable with Connector

This type of sensor features a fixed cable that can be preassembled. Sensors with fixed cable are affordable versions, since they do not require an additional single-ended female cordset and keep the number of connection points to a minimum.

This type of magnetic field sensor does not have a special marking in the type code.

Electrical Versions and Typical Switching Examples

The following table provides an overview of common magnetic field sensors with regard to the electrical design, sensor type, switching examples, and typical data.


Direct Current Voltage 10 V … 60 V
Sensor type
  • 2-wire
  • Z/Z0, Z1, Z2, Z3, Z4, Z5
  • Standard type
  • Short-circuit proof
  • Reverse polarity protection
Wiring diagram according to EN 60947-5-2

NC contact and NO contact

Example: NO contact Z/Z0
Typical data
  • Basic series 5 V/ 4 mA ... 100 mA
  • Standard series 4 V/ 2 mA ... 200 mA
  • Residual current 0.7 mA/ 0.5 mA 

 

Note: This table applies to sensors with electronic output stages. Reed switches are mechanical contacts with magnetic actuation. They have only two connections and are intentionally not listed here.


Basic Series 10 V … 30 V, 100 mA
Standard Series 10 V … 60 V, 200 mA
Sensor type
  • 3-wire
  • E/E0, E1, E2, E3, E5, E8
  • Short-circuit proof
  • Reverse polarity protection
Wiring diagram according to EN 60947-5-2

NC contact and NO contact

Example: NO contact E/E0
Basic circuit diagram
Typical data
  • Voltage drop 2.5 V
  • Residual current 0.3 mA (usually only a few µA)
  • Operating current, 0 mA ... 200 mA
  • No-load current 20 mA

 

Sensor type
  • 4-wire
  • A, A2
  • Short-circuit proof
  • Reverse polarity protection
Wiring diagram according to EN 60947-5-2

NC contact and NO contact

Example: NC contact and NO contact A2
Typical data
  • Voltage drop 2.5 V
  • Residual current 0.3 mA (usually only a few µA)
  • Operating current, 0 mA ... 200 mA
  • No-load current 20 mA

 

Direct Current Voltage, 8 V DC
Sensor type
  • NAMUR, N, 1N, SN, S1N
  • EN  60947-5-6
Wiring diagram according to EN 60947-5-2

NC contact or NO contact

Example: NC contact N/N0 or SN
Typical data
  • Rated voltage 8 V
  • Output current: 
    < 1 mA actuated
    > 3 mA unactuated

Sensor Types: Core Colors and Pinout According to EN 60947-5-2 

The section below provides an overview of the pinout and core colors of the magnetic field sensors.

The pinout numbers correspond to the numbering of the pins on the connector plugs. This does not apply to proximity sensors for AC and those with three-pin 8 mm plugs.

Switches without protective insulation require a protective conductor terminal for voltages above 50 V AC and 120 V DC. 

 

3 DC Connections—Observe Polarity
Function NO contact
Connection/wire colors + | - | output
Brown (BN) | Blue (BU) | Black (BK) 
Pinout 1 | 3 | 4 
V1 connector plug
V3 connector plug

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