Component Description Diagram
PC cable and adapter
• Connection cable for exchanging data between
the PC or programming device and the 3RK3 cen‐
tral unit.
The connection cable connects the interface of
the PC/programming device to the device inter‐
face of the 3RK3 central unit
– RS 232 PC cables
Article number: 3UF7940-0AA00-0, product
version 2 or higher
– USB PC cables
Article number: 3UF7941-0AA00-0
– USB to serial adapter for connecting an
RS 232 PC cable to the USB interface of a PC
Article number: 3UF7946-0AA00-0
Memory module
• External memory module of the 3RK3 central
unit for storing conguration data
• The slot for the memory module is located on
the underside of the 3RK3 central unit
• Article number: 3RK3931-0AA00
Note: One memory module each is included in the
scope of supply of the 3RK3 central unit.
Interface cover
• Cover for not assigned system interfaces:
– Protection against dirt
– Compliance with EMC regulations
– Seal to protect interface against unauthor‐
ized access
• Article number: 3UF7950-0AA00-0
Door adapter
• For bringing out the device interface, e.g. out of
a control cabinet
• Article number: 3UF7920-0AA00-0
Overview
3.5 MSS 3RK3 system components
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006 45
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