Requirements For The Safety Switches; Examples Of Range Of Use - SICK UE3212 Instrucciones De Servicio

Operating instructions
UE3212
WARNING
Note
8010726/TF84/2010-07-20
Subject to change without notice
Product description
3.4

Requirements for the safety switches

Do not connect any devices with semiconductor outputs!
The safe bus node UE3212 is not designed for sensors with semiconductor outputs, e.g.
electro-sensitive protective equipment, and does not work with such devices.
Safety switches that are used with the safe bus node UE3212 must always meet the
following requirements:
switching contacts with isolated switching elements
design of the switching contacts as normally closed contacts, i.e. contacts open when
the safety function is required
switching contacts with a safety function by means of positive opening in accordance
with EN 60 9476561 annex K
the contacts must open for at least 43 ms
The minimum opening time for the contacts is provided by the design of the majority of the
relevant safety switches. Safety switches with opening times shorter than 43 ms, e.g. fast
position switches, are not recommended for use with the safe bus node UE3212, as they
can restrict the availability in the AS6Interface safety monitor, depending on the monitoring
block used in the safety monitor, as follows:
With the "two-channel positively driven" setting, the safety monitor may switch to the
error state. To clear the error state, the voltage supply to the safety monitor must be
interrupted.
With the "two-channel dependent" setting the safety monitor only permits the enable
after adequate switch off time. The enable can be achieved by triggering the safety
switch for at least 43 ms.
3.5

Examples of range of use

The following overview lists examples of several possible uses of the safe bus node
UE3212 in connection with various safety components.
Connection of position switches, e.g. SICK i10 PA, i10 RA, i110 P, i110 R
Connection of switches with separate actuator, e.g. SICK i12, i16, i17, i110 S
Connection of emergency stop pushbuttons, e.g. SICK ES21, and rope switches, e.g.
SICK i110 RP
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