System Design And Function; Fig. 1 Drive Controller And Safety Module (Pds(Sr) - System Design - Pilz Intern PMC SR6 Manual

System design and function

5 System design and function
Controller
+
fieldbus
master
Safety
relay
I/O
Fig. 1: Drive controller and safety module (PDS(SR) – System design
Function
The control unit of the drive controller generates pulse patterns (PWM) to produce a rotating magnetic
field at the IGBT module in the power unit. This rotating magnetic field is necessary for operating
synchronous and asynchronous motors.
If the safety function is not active, the PMC SR6 safety module allows for the generation of a rotating
magnetic field in the power unit; the connected motor can create a rotating magnetic field. If the safety
function is active, PMC SR6 disables the generation of the rotating magnetic field in the power unit
and the drive controller cannot generate any torque in the connected motor.
The immediate switch-off after an emergency stop corresponds to the STO safety function in
accordance with DIN EN 61800-5-2. In DIN EN 60204-1, this type of switch-off is defined as stop
category 0.
A time-delayed switch-off after an emergency stop corresponds to the SS1-t safety function in
accordance with DIN EN 61800-5-2. In DIN EN 60204-1, this type of switch-off is defined as stop
category 1.
Manual PMC SR6 safety module
1005344-en-US-01
Intern
Drive controller
with integrated safety technology – PDS(SR)
Power unit
Application
STO
a
STO
status
STO
b
Motion Control
core cascade
PMC SR6
NOR
IGBT
M
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