#0-313A-SBA (6/01)
Page 5 of 14 pages
BARRETT CENTRIFUGALS INC.
1-800-228-6442
LATCH OPEN
INDUCTIVE SENSORS
(TOP VIEW)
(FRONT VIEW)
LATCH CLOSED
LATCH STOP
SET SCREW
ADJUSTMENT
SOLENOID PIN
position, the latch cannot be opened with the power off.
Fig. 2.
Lid latch detail.
In the operation of your machine it is important to operate the lid latch handle properly
to prevent an inconvenient lockout by the safety lid latch.
1. The machine is shipped in an unlocked but secured condition. Cut away the wire tie that
holds the locking lever. The lever can then be retracted and the lid raised.
2. Once all wiring to the machine is complete (refer to the "Wiring" section of these
instructions), turn the electrical power to the machine on.
3. Close the lid and slide the locking lever into the slot in the latch housing. This action
triggers a latch-close sequence. As the latch passes over the inductive sensors a
sequence of signals is sent to the PLC. If the sequence is verified and completed in the
given amount of time a flashing green light indicates that the machine is properly latched
and ready to start. (If the green light does not flash, simply retract the lever all the way to
the right and start the process over.)
4. When the
START
push button is pressed the solenoid pin drops and the green light goes
out. The pin prevents the latch from being opened. The machine will spin for the time set
on the manual timer within the control panel. Normal spin time is 30 - 45 minutes.
5. When the time has elapsed, the DC brake will activate. After the machine brakes to a stop
the solenoid is energized, lifting the pin, and the green indicator light will illuminate.
6. The lid may now be opened. To open the lid, slide the lever out of the latch housing. The
machine can only be unlatched with the power
on
and the green
OPEN
light illuminated.
In the event of a power failure the solenoid is disabled. The lid may not be opened until
power is supplied. If a momentary power loss occurs during a ‘run’ condition the latch will
not unlock until the spindle coasts to a stop.
