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Installation of level sensorsFor flush mounting, the sensor can be built into influencing material up to its active surface without changing its characteristics. For non-flush mounting, a metal-free zone around the sensor must be allowed for. A free zone to the material opposite the sensor must be maintained for all sensors.
Connecting more than one device in close proximity When locating sensors in close proximity, a minimum separation must be kept between the devices in order to avoid mutual influence. When in doubt, a test should be conducted under application conditions. For capacitive sensors, the lateral separation from one another must correspond to at least twice the diameter of the sensor. For separations greater than eight times the diameter no mutual influence is to be expected. For oppositely mounted sensors, a minimal separation of eight times the nominal switching separation should be allowed for. Torques In order to prevent destruction of the threaded bushing during fitting, the following maximum torques must not be exceeded:
Instructions for operation Serial connection For the serial connection of two wire or three wire sensors the individual voltage drops are added together. Therefore there is a lesser operational voltage at the disposal of the load. The addition of the switch-on delay times should be noted. Parallel connection The parallel connection of two wire sensors can only be conditionally recommended since the residual currents are added together and flow through the load. For the parallel connection of three wire sensors, the current consumption of the individual devices is added together. Since this current does not flow through the load, the maximum number of parallel connectable three wire sensors depends only on the power supply. Approval for safety applications Sensors for personal security must have a qualification approval according to EN 954-1 and must be labelled accordingly. Sensors that are not labelled must not be used for applications of this kind.
All pages in section: Level Sensors
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