user’s manual
(3AXD50000015612 [English]) or
FSO-21 safety functions module user’s
manual
(3AXD50000015614 [English]).
The design principles of the Q950 comply with EN ISO 13850. The STO function
complies with EN/IEC 61800-5-2. For a complete list of related standards and European
directives, see section Related standards and directives.
￭
Summary of wirings and settings
The wirings and settings of the POUS function are:
•
The inverter units are equipped with the FSO safety functions modules (Q973
or +Q972). ABB installs the modules at the factory.
•
The user must wire a dual-channel POUS switch to the FSO module. See section Wiring.
•
The user can wire a POUS indication lamp to the FSO module (optional).
•
The digital input of the FSO module to which the POUS switch is connected, is selected
as the input for the POUS request. This is an FSO module parameter that ABB sets at
the factory. The user must check the setting at the start-up.
•
The digital output of the FSO module to which the POUS indication lamp is connected,
is selected as the output for the POUS completed signal. This is an FSO module
parameter that ABB sets at the factory. The user must check the setting at the start-up.
For a detailed description of wirings, see sections Operation principle diagram and Wiring.
For a detailed description of parameter settings, see section Parameter settings.
Operation principle
￭
Time scheme
This time scheme diagram illustrates the operation of the POUS function. This safety function
uses the POUS function of the FSO module. For more information, see the FSO module
user’s manual.
Option description and instructions 15
Operation principle
Time scheme
This time scheme diagram illustrates the operation of the POUS function. This safety
function uses the POUS function of the FSO module. For more information, see the FSO
module user’s manual.
A
POUS indication delay (see parameter
POUS.13
): An
additional security delay. The POUS
completed indication (parameter
POUS.22
) becomes active after this delay.
Step
Description
1
The user stops the motor.
2
After the motor has reached the zero speed, the user switches the POUS switch off (open). The FSO
module activates the drive STO function.
Note
: If the user activates the POUS function when the motor is running, the FSO module activates
the drive STO function, the motor coasts to a stop and the FSO module generates a fault.
3
After time A has elapsed, the POUS indication lamp turns on (POUS completed indication).
4
The user switches the POUS switch on (closed). The FSO module deactivates the drive STO function
and turns off the POUS indication lamp. The user can start the motor again.
Note
: In this case, automatic acknowledgement of the POUS function is selected (parameter
POUS.02
).
5
The user restarts the motor.
1
2
4
POUS switch
(POUS request)
STO status
(POUS status)
A
POUS
indication lamp
3
5
Motor speed
Time
16 Option description
