January 2011
7 of 9
Impulse•G+/VG+ Series
3
Safe-Off 8001.x
PN:
140-10305
If two separate signal lines from the safety device to inputs BB and BB1 are used as shown on
the previous page (
Figure 1: Safe-Off Circuitry
), the drive does not need to be installed in an
IP54 enclosure. If only one signal line from the safety device to the drive is used, and BB and
BB1 are linked at the drive, then the drive must be installed in an enclosure with a protection
degree of at least IP54 in order to maintain EN954-1, Safety Category 3 compliance.
If the safety device and the drive are installed in separate cabinets, the Safe-Off wires must be
installed in a short-circuit-proof manner.
The Safe-Off function does not cut the power supply to the drive and does not provide electrical
isolation to the motor. The drive must be disconnected from the power mains before any
installation or maintenance work is done. Always use “lock-out, tag-out” or similar approved
safety protocol when servicing equipment.
Risk Assessment Required
To assure that the Safe-Off function appropriately fulfills the safety requirements of the
application, a thorough risk assessment shall be done according to
ISO12100
for the whole
safety system at the final installation.
Safety Function Inspection
Check the safety function during periodic maintenance by hitting the STOP switch or tripping the
appropriate safety interlock. Verify that the applicable motor stops and that the digital operator
shows the “BB” indication on the display. If the motor does not stop or the “BB” indication does
not appear,
discontinue using the drive at once
. Replace the Impulse•G+/VG+ Series 3 or its
control board and do not resume operation until it is verified that the applicable motor stops and
that the digital operator shows the “BB” indication on the display.
Figure 3: Connection in IP54
Enclosure
