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Beckhoff KL6904

Render Technology Solutions deal with all kinds of Beckhoff Products


Render Technology Solutions deal with all kinds of Beckhoff Products

Beckhoff Busklemme KL6904 4DO Ausgangsklemme Twinsafe bus terminal KL 6904 digital output

TwinSAFE enables networks with up to 1,024 TwinSAFE devices. The KL6904 TwinSAFE Logic Bus Terminal can establish 15 connections (TwinSAFE connections). Multiple Logic Terminals are cascadable within a network. The Bus Terminal features certified safety function blocks, which are configured according to the application to be realised. Functions such as emergency stop, safety door monitoring, etc. can thus easily be selected and linked. All blocks can be freely connected among each other and are complemented by operators such as AND, OR, etc. The required functions are configured via the TwinCAT System Manager and loaded into the KL6904 Logic Terminal via the fieldbus. The TwinSAFE logic terminal has four safe, local outputs, so that safety applications can be realised with only two components (KL1904 and KL6904). The KL6904 is suitable for applications up to DIN EN ISO 13849-1:2008 (Cat 4, PL e) and IEC 61508:2010 (SIL 3).


Beckhoff KL6904

Beckhoff KL6904 | TwinSAFE Logic Bus Terminal


General Description


Beckhoff KL6904 | TwinSAFE Logic Bus Terminal
TwinSAFE enables networks with up to 1,024 TwinSAFE devices. The KL6904 TwinSAFE Logic Bus Terminal can establish 15 connections (TwinSAFE connections). Multiple Logic Terminals are cascadable within a network. The Bus Terminal features certified safety function blocks, which are configured according to the application to be realised. Functions such as emergency stop, safety door monitoring, etc. can thus easily be selected and linked. All blocks can be freely connected among each other and are complemented by operators such as AND, OR, etc. The required functions are configured via the TwinCAT System Manager and loaded into the KL6904 Logic Terminal via the fieldbus. The TwinSAFE logic terminal has four safe, local outputs, so that safety applications can be realised with only two components (KL1904 and KL6904).

Technical data KL6904
Connection technology 2-wire
Specification link unit between safe input and output signals
Number of outputs 4
Max. output current 0.5 A/20 mA min. (per channel)
Protocol TwinSAFE/Safety over EtherCAT
Cycle time 4…100 ms
Fault response time ≤ watchdog time (parameterisable)
Current consumption power contacts load-dependent
Current consumption K-bus max. 250 mA
Installation position horizontal
Safety standard DIN EN ISO 13849-1:2008 (Cat. 4, PL e) and EN 61508:2010 (SIL 3)
Approvals CE, UL, Ex, TÜV SÜD
Weight approx. 100 g
Protection class IP 20