Specifications - Mitsubishi Electric MR-J4 Instruction Manual

13. USING STO FUNCTION

13.1.5 Specifications

(1) Specifications
Functional safety
Safety performance
Mean time to dangerous failure
(MTTFd)
Diagnostic converge (DC)
Average probability of dangerous
failures per hour (PFH)
Number of on/off times of STO
CE marking
Note. This is the value required by safety standards.
(2) Function block diagram (STO function)
(3) Operation sequence (STO function)
Item
[1/h]
CN8
Shut-off signal (STO1)
Monitor signal (TOFB1)
Shut-off signal (STO2)
Monitor signal (TOFB2)
Servo motor speed
0 r/min
EM2 (Forced stop 2)
STO1 STO2
Magnetic contactor
Base circuit
(Supplying energy to
the servo motor)
13 - 3
Specifications
STO (IEC/EN 61800-5-2)
ISO/EN ISO 13849-1 category 3 PL d, IEC 61508 SIL 2,
EN 62061 SIL CL2, EN 61800-5-2 SIL 2
100 years or more (Note)
medium (90% to 99%) (Note)
1.68 × 10
1,000,000 times
LVD: EN 61800-5-1
EMC: EN 61800-3
MD: EN ISO 13849-1, EN 61800-5-2, EN 62061
Base power
supply for
upper arm
Shut-
off
Base power
supply for
lower arm
Shut-
off
ON
OFF
ON
OFF
ON
OFF
(8 ms)
ON
OFF
-10
Power
module
M
Servo motor