6
vacon • 32 Commissioning
Local contacts: https://www.danfoss.com/en/contact-us/contacts-list/
6.2 Wiring examples
The examples in this chapter show the basic principles for wiring OPTBJ board. Local standards
and regulations should be always followed in the final design.
Example 1: OPTBJ board without reset for Safe Torque Off (STO)
The figure above shows a connection example of OPTBJ board for Safe Torque Off safety function
without reset. The switch S1 is connected with 4 wires to the OPTBJ board as shown above.
When the switch S1 is activated (contacts open), the drive goes to STO state and motor (if running)
will stop by coasting. If STO fault action is parameterized as "Alarm", the drive indicates: "30 Safe
torque off". Regardless of the parameterization, activation of STO function causes a coasting stop
for motor.
To allow the returning of the drive to ready state without a reset after S1 is deactivated (contacts
closed), STO Fault action must be parameterized as "Alarm". See application manual for related pa-
rameters.
To start the motor operation again, the following sequence is performed.
• Release the switch S1 (contacts closed). The hardware is now enabled and the drive returns to ready
state.
• Giving a valid start command starts running the motor.
NOTE! According to EN 60204-1 (Safety of machinery - Electrical equipment of machines), the re-
setting of the emergency stop request (e.g. releasing of emergency stop button) must not restart
the drive.
NOTE! The VACON
®
100 default application software uses edge-sensitive start as a default start
command. With the edge-sensitive start command, disactivating the STO does not cause immediate
start.
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