valves on a hydraulic motion base. These valves are always installed so that they
only allow the servos to operate the motion base when power is applied them.
Orifices (usually fixed) allow the oil to drain out of the cylinders so that gravity and/
or remaining accumulator pressure will lower the motion base when power is re-
moved. This so that if there is a power failure or any other error condition, the mo-
tion base will park itself safely. In most motion base applications, the power is re-
moved from the blocking valves during the Load/Unload times so that there is no
possibility of the motion base moving while riders are walking in and out.

This output is used to control the blocking valve attached to the motion base.

The output capacity of this output is 150 ma. at 24 vdc. Since the solenoid valves
used for blocking valves usually draw far more current than this, a solid state relay
will most likely be required on this output. If you are using one of Gilderflukeʼs
ʻElectronic Blocking Valvesʼ, you will not need to use a relay.

The blocking valve is programmed from the motion profile stored on the Smart

Brick System. Unless the Kp-300 is receiving an active

HPU Running Input

and

the Kp-300 is not in an E-Stop condition, the

Blocking Valve Input

from the Smart

Brick System will not be passed through to the

Blocking Valve Output

4) HPU Run Output from Kp-300

This output from the Kp-300 is turned on when the operator presses the

HPU