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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). The KL6904 is suitable for applications up to SIL 3 according to IEC 61508 and DIN EN ISO 13849 PLe.


Technical data  
Technology TwinSAFE Logic
Safety standard IEC 61508 SIL 3 and DIN EN ISO 13849-1:2008 PLe
Number of outputs 4
Protocol TwinSAFE/FSoE
Status display 8 LEDs: 1 per output, 4 diagnostic
Cycle time 4…100 ms
Current consumpt. K-bus 250 mA
Fault response time ≤ watchdog time (parameterisable)
Bit width in the process image 6…192 bytes
Supply voltage 24 V DC (-15 %/+20 %)
Output current 0.5 A max./20 mA min. (per channel)
Special features 4 safe outputs
Weight approx. 90 g
Operating/storage temperature 0…+55 °C/-25…+70 °C
Permiss. degree of contamin. 2
Climate class EN60721-3-3 3K3
Electrical interference EN 61000-6-2/EN 61000-6-4
Vibration/shock resistance EN 60068-2-6/EN 60068-2-27/29
Installation position horizontal
Protection class IP 20
Approvals CE, UL, Ex, TÜV Süd



Special terminals  
KL6904-0001 TwinSAFE Logic Bus Terminal, preconfigured ex factory to 15 TwinSAFE connections