Inputs and outputs
The 3RK3 ASIsafe extended central unit has the following inputs and outputs:
• 4 safety-related, freely parameterizable sensor inputs
• 4 standard inputs
• 1 safety-related two-channel relay output
• 1 safety-related two-channel semiconductor output
• 2 test outputs for sensor supply and monitoring when used with safety-related sensor inputs
Note
Safety-related outputs
If you use the safety-related outputs with a two-channel shutdown, a fault exclusion, such as a
short-circuit to P or M, is required. This condition is met within a control cabinet and when the
connection cables are installed in such a way that they are protected.
MSS 3RK3 ASIsafe extended on the AS-i bus
The MSS 3RK3 ASIsafe extended can perform various functions on the AS‑i bus:
• Simulation of up to 4 non-safety-related AS-i slaves
• Simulation of up to 10 safety-related AS-i input slaves
• Control of up to 10 safety-related AS-i outputs
• Display of up to 31 safety-related AS-i outputs
• Monitoring of up to 14 non-safety-related AS-i slaves
• Monitoring of up to 31 safety-related AS-i input slaves
You will nd further information in Chapter "Connecting to the AS-i master via AS-Interface
(Page 202)."
Description of the hardware
5.1 Description of the individual modules
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006 91
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