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FIESSLER
E L E K T R O N I K
Safety category 2
The TLCT / ILCT safety light barriers belong to safety category 2 as per EN 945-1 and IEC 61496 / EN 61496. Type 2
safety device may only be applied, if the machine-specific C standard allows this expressly or the risk assessment
pursuant to EN 1050 resp. En 951-1, fig. C1 and E1 prove a little (II) to medium risk degree (III).
User-friendly self-testing: The customary testable Type 2 light curtains required a external cyclic system test.
With TLCT/ ILCT light curtains, this is no longe necessary, because a contiunuous internal self-testing is active.
Safety category 4
ULCT / BLCT safety light barriers belong to safety category 4 according to EN 954-1 and IEC 61496 / EN 61496.
Devices in safety category 4 are self-monitoring, contactless protective mechanisms representing the highest safety class for
devices of this kind.
Beam spacing
The spacing between the individual lens centres of TLCT light curtains.
Valve / contactor control (EDM - external device monitoring)
Before the switching outputs are enabled, the contactor control system always checks whether the connected switching elements
(relays, contactors and valves) are released. Only then can the switching outputs be enabled again. This prevents a failure of the
switching elements (relays, contactors and valves) used to control hazardous movement.
Restart interlock
This function prevents automatic enabling of the switching outputs following interruption and subsequent clearing of the protective
field (e.g. caused by passage through the field).
Fiessler Elektronik GmbH & Co. KG
Kastellstr. 9
D 73734 Esslingen
Definition of terms
8
BA - TLCT / ICT_1129
Phone: +49 / 711 / 91 96 97-0 Internet: http://www.fiessler.de
36
Fax:
+49 / 711 / 91 96 97-50 E-mail: info@fiessler.de
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