Each tGard stack has between one and ten slots for different elements which create an interlock that is configured for your specific application. Each slot can have a mix of different things, this page gives technical details about tGard HLC. 

If you are not familiar with tGard we recommend you first read about the range in general on the tGard product page or look at our how to buy tGard page to understand the process of configuring the perfect stack.


The High Level Coded (HLC) element for the tGard configurable access & control unit for machine guarding provides protection against defeat with a high misalignment tolerance on the actuator and provides safety outputs through OSSD or SSR configurations.
The tGard High Level Coded (HLC) element can also incorporate safety contacts from associated tGard elements.


High Level Coded element

Technical Specification


Performance Level (EN ISO 13849-1:2015)

Up to PLe

Category (EN ISO 13849-1:2015)

Up to Cat.4

SIL (according to IEC 62061)

Up to SIL CL3

Diagnostic Coverage

A maximum DC of 99% can be achieved with suitable monitoring



Demand Mode (according to IEC 62061)


Applied Standards

BS EN ISO 13849-1:2015
BS EN ISO 13849-2:2012
BS EN ISO 14119:2013
UL 508/R:2013-10
CAN/CSA-C22.2 No.14-13:2013-03Gard

Reteaching Actuator Instructions


The tGard High Level Coded element is  reteachable up to 10 times using the Teach Token accessory which can be used in the event of a damaged or lost actuator. Teach Token should be kept secure. Note: Teach Token sold separately.

Reteaching Actuator Instructions

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