EUCHNER Electronic-Key Adapter with serial Interface - Manual (Page 7)

Manual EKS Electronic-Key Adapter serial
088796-02-03/05 Subject to technical modifications Page 7/24
3 Function
3.1 Functional description
The EKS is used for access control and monitoring on control systems (PC/PLC) or parts of control systems for
machine installations.
Instead of passwords, coded Electronic-Keys are assigned. In this way unauthorized access to control and
display systems is prevented to the greatest possible extent.
The EKS uses a non-contact, inductive read/write identification system.
It comprises:
Electronic-Key
Electronic-Key
adapter
The user is responsible for organizing the programming of the application, integration in an overall system and
the assignment and use of the freely programmable memory in the Electronic-Key.
The Electronic-Key adapter is a read/write system with integrated evaluation unit and interface.
Due to the non-contact transfer of data, it was possible to design the Electronic-Key adapter with the high
degree of protection of IP 67 from the access side, i.e. it is suitable for industrial use. The Electronic-Key
adapter can be installed as per DIN 43700 in any control panel with a standard cut-out of 33 mm x 68 mm. The
Electronic-Key adapter is fastened by means of screw clamp elements from the rear side of the panel in order to
exclude unauthorized manipulation from the operator side.
The system connection is made using the integrated serial interface (RS232/RS422 switchable).
Setup and system integration can be realized straightforwardly and quickly on the Electronic-Key adapter with
serial interface. Data communication is in accordance with the transfer protocol 3964R.
On Electronic-Keys read/write with 116 bytes, the memory is organized in 4-byte blocks. This means a multiple
of 4-byte sized blocks must always be written.
The current state of the Electronic-Key adapter is displayed using a 2-color LED.
The Electronic-Keys are tag shaped. The complete, battery-less transponder with memory chip and antenna is
integrated into the Electronic-Key.
For operation, the Electronic-Key is inserted in the Electronic-Key adapter and is held in place by a spring clip.
The power supply for the transponder and the data are transferred without contact between the Electronic-Key
adapter and the Electronic-Key.
Cut-away illustration of Electronic-Key adapter
The data carrier in the Electronic-Key is equipped with a combined memory:
116 bytes E²PROM (programmable) plus an additional 8 bytes ROM (serial number)