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1 interface, 2 connection of power supply, Interface – EUCHNER FSA Light User Manual

Page 30: Connection of power supply, Manual eks light and light fsa 7.1 interface

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Manual EKS Light and Light FSA

7.1 Interface

The parallel interface is easy to integrate into the control environment, and the data can be depicted in a
transparent manner. This allows rapid and inexpensive integration into any type of programmable logic
controller.

Communication with the peripheral equipment takes place exclusively via these switched outputs, which can
engage the states High and Low. All outputs are at Low level after the device is switched on.

The strobe output is set to High level when an Electronic-Key receives access via a valid access code.

The access level is output via the 4-bit parallel interface. The four data wires, which can be connected directly to
the inputs of a programmable logic controller, for example, represent values between 0 and 15 via High/Low
levels (24 V/0 V).

A binary-coded value between decimal 0 and 15 is represented via combinations of High/Low levels at the data
outputs. The values result as follows:

Output A = High corresponds to decimal value of 1 (LSB)

Output B = High corresponds to decimal value of 2

Output C = High corresponds to decimal value of 4

Output D = High corresponds to decimal value of 8 (MSB)

Therefore, if the outputs A, B and C, for example, are set to High level when the Electronic-Key is placed; this
corresponds to an access level of 1 + 2 + 4 = 7.

7.2 Connection of power supply

It is imperative that the following points are observed:

 The connections must be made as appropriate to maintain EMC performance.

 A power supply of suitable EMC performance must be used for the power supply.

 Conductor cross-section max. 1.5 mm² (Electronic-Key adapter compact).

 Conductor cross-section max. 2.5 mm² (interface adapter modular).

 Tighten the terminal screws on the plug to 0.22 Nm (Electronic-Key adapter compact).

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Subject to technical modifications

110845-04-03/12

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