Delta VFD9A0MS43ANSHA User Manual

Chapter 17 Safe Torque Off FunctionMS300 (High Speed Model)
17-2
17-1 Basic Function Description
MS300 series provides a Safe Torque Off (STO, Safe Torque Off) function. Through the
dual-channel S1 and S2 signal input to turn off IGBT switching, thereby preventing the
generation of motor torque in order to achieve safe stop. Please refer to Figure 1 for the circuit
diagram of Safe Torque Off function.
MS300 Safe Torque Off function meets the following international specifications:
ISO 13849-1: 2015 Category 3 PL d
IEC 61508 SIL2
EN 62061 SIL CL 2
EN 60204-1 Category 0
Line
Driver
GU
GV
GW
GX
GY
GZ
Gate
Driver
IGBT Power Section
Motor
STO Functional Block Of Subsystem 3
+3.3V
+3.3V
+3.3V
A
B
CD
G
F
FDBK
MO2
MCM
RC
RA
1
2
3
S1
DCM
S2
DCM
R1
R2
R3
MCU
AC power
Line
Driver
2
SU1
SV1
SW1
SX
SY
SZ
SU
SV
SW
R4
4
+3.3V
DEC
Reset
IC
+3.3V
Channel A (safety)
Channel B (safety)
Diagnostic path
Non-safety path
Safety PLC
Emergency
Stop button
+24VDC
Figure 1: The circuit diagram of Safe Torque Off function

Delta VFD9A0MS43ANSHA Specifications

General

Brand	Delta
Model	VFD9A0MS43ANSHA
Category	Controller
Language	English