Siemens SIRIUS 3RK3 - Page 87

• 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 basic on the AS-i bus
The MSS 3RK3 ASIsafe basic can perform various functions on the AS‑i bus:
• Simulation of up to 4 non-safety-related AS-i slaves
• Simulation of up to 8 safety-related AS-i input slaves
• Simulation of up to 8 safety-related AS-i output slaves
• 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)."
Structure of the 3RK3 ASIsafe basic central unit
Front view No. Meaning
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;;
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6)
5(6(7
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$6L
7($&+
24V
DC
,1,1,14
),1,1,1,14
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3RK3121-1AC00
① Removable terminal block D
② Removable terminal block C
③ RESET button
④ Removable terminal block A
⑤ External memory module (X3; sealable)
⑥ Label
⑦ Display LEDs
⑧ Connection of PC or programming device,
interface module, diagnostics display (X1)
Description of the hardware
5.1 Description of the individual modules
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006 87