Product Features
Safety CPU
The safety CPU module enables control of both general and safety programs in the same module and is easily programmed utilizing the intuitive features of GX Works3. Compliant with internationally recognized safety standards, the safety CPU enables safety devices such as safety light curtains, emergency switches, and door switches to be connected via the CC-Link IE Field network without requiring a separate dedicated network line. The safety CPU is easily programmed using GX Works3, and utilizes its intuitive features.
General and safety control in one CPU
The safety CPU can be installed directly on the MELSEC iQ-R Series base rack, and is easily integrated into an existing or new control system. Safety devices are connectable using the CC-Link IE Field network with safety communication integrated into the network protocol over a widely-available industrial Ethernet topology. The safety CPU is compliant with ISO 13849-1 PL e and IEC 61508 SIL 3 and is certified by TÜV Rheinland®.
Common engineering platform
In GX Works3, operation and safety programs are included in the same project folder, eliminating the need to manage multiple project folders. Various useful features of GX Works3 are also available for safety programs similar to other control programs.
Faster response times and handling of larger programs
Utilizing the high-performance capabilities of the MELSEC iQ-R Series and CC-Link IE Field network, productivity is enhanced as response times are even faster. Additionally, safety control program capacity has been increased by up to three times, to 40K steps, enabling the control of more complex programs.
Safety CPU performance specifications
: Ladder diagram 
: Structured text 
: Function block diagram
| Item | R08SFCPU-SET*1 | R16SFCPU-SET*1 | R32SFCPU-SET*1 | R120SFCPU-SET*1 |
|---|---|---|---|---|
| Safety integrity level (SIL) | SIL 3 (IEC 61508) | |||
| Performance level (PL) | PL e (EN/ISO 13849-1) | |||
| Control method | Stored program cyclic operation | |||
| I/O control mode | Refresh mode (Direct access I/O is available by specifying direct access I/O (DX, DY)) | |||
| Programming language | *2 *2 | |||
| Extended programming language | Function block (FB), label programming (local/global) | |||
| Program execution type | Initial*2, scan*2, fixed scan, interrupt*2, standby*2 | |||
| Number of I/O points [X/Y] (point) | 4096 | 4096 | 4096 | 4096 |
| Memory capacity | ||||
| Program capacity (step) | 80K (40K for safety programs) | 160K (40K for safety programs) | 320K (40K for safety programs) | 1200K (40K for safety programs) |
| Program memory (byte) | 320K | 640K | 1280K | 4800K |
| Device/label memory*3 (byte) | 1178K | 1710K | 2306K | 3370K |
| Data memory (byte) | 5M | 10M | 20M | 40M |
| SLMP communication | ● | ● | ● | ● |
*2: Cannot be used for safety control programs.
*3: An extended SRAM cassette expands the device/label memory area.
Safety remote I/O
Ensures safety on a large-scale production line and distributed system such as an automotive assembly line with multiple welding robots operating. In systems with multiple stations and safety controllers, critical safety data is shared over the network which allows an emergency stop in one station to safely stop the stations before and after within the production line. The safety CPU is connected using CC-Link IE TSN with safety communication integrated into the network protocol. Also, the motion module supports safety communication with the AC servo via CC-Link IE TSN. General and safety devices, together with drives can be connected on the same network line (up to 120 devices in total), realizing a reduced wiring and highly scalable system lowering overall system cost.
