EUCHNER EKS FSA with Ethernet Interface - Manual (Page 6)

Manual EKS Electronic-Key Adapter Ethernet
1.4 Correct use
As part of a higher-level overall system, the EKS Electronic-Key adapter is used for access control and
monitoring on controllers or parts of controllers for machine installations. EKS can be used, for example, as part
of an overall system for checking access rights for operating mode selection. However, it is not permitted to
directly derive the operating mode from the access rights on the Electronic-Key. If the selection of the operating
mode is relevant for safety, this must not be performed by means of the EKS; instead an additional device must
be used to select the operating mode. This is possible via the graphical user interface on the control system, for
example.
The version EKS FSA has outputs that can be utilized to form a safe shut-down signal (for block diagram see
section 3.1.2). For this purpose a safe evaluation must be included downstream. The EKS FSA can then be
used for safety-related tasks. The machine must be reset to a safe operating mode by removing the Electronic-
Key. A hazard analysis on this aspect must be prepared as per the requirements in the machinery directive.
The risk and the necessary risk minimization by technical means must be determined using a suitable standard.
The following requirements must be met for usage:
f The data signal (channel LB) and the switched output LA1/LA2 (channel LA) must be polled by a safe
downstream evaluation to suit the risk determined. The data wire (channel LB) is used to supply the
information as to whether or not an Electronic-Key is inserted and which access rights are assigned to the
Electronic-Key. The output LA1/LA2 (channel LA) is used for the redundant supply of the information as to
whether or not an Electronic-Key is inserted (independent of the access rights). The data wire or,
alternatively, the switched output LB1/LB2 can be used as channel LB. The output LB1/LB2 is used to supply
(like LA1/LA2) only the information as to whether or not an Electronic-Key is inserted (independent of the
access rights). The usage of the output LB1/LB2 is optional.
f The control system must check whether the Electronic-Key inserted is authorized to select the operating
mode and whether the access rights on the Electronic-Key permit operation in the operating mode currently
selected.
f The user must select the related operating mode using the control system or another suitable circuit.
f The manufacturer of the system must check which safety level is reached with the overall system and
whether the overall system provides adequate safety against hazards in the intended application.
Information!
The machinery directive 98/37/EC provides information on selection of the operating mode. It is
imperative this information is followed.
When designing machines and using the Electronic-Key adapter , the national and international regulations and
standards specific to the application must be observed, e.g.:
f EN 60204, Safety of machinery. Electrical equipment of machines
f EN 12100-1, Safety of machinery. Basic concepts, general principles for design - part 1: basic terminology,
methodology
f EN 954-1, Safety of machinery. Safety related parts of control systems - part 1: general principles for design
f EN 62061, Safety of machinery. Functional safety of safety-related electrical, electronic and programmable
electronic control systems
f EN ISO 13849-1, Safety of machinery. Safety related parts of control systems - part 1: general principles for
design
Modifications to the electronics of the Electronic-Key adapter and any other changes, especially mechanical
modifications and reworking, are not permissible and will result in the loss of the warranty and exclusion of
liability.
Page 6/40 Subject to technical modifications 100420-02-01/09