Koso REXA Electraulic Xpac, Installation And Operation Manual

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Xpac
Installation Manual -- Version 5.1 (5/09)
C-6
REXA
Electraulic Actuators & Drives
C.2.3 Geared Hand Crank
The geared hand crank consists of a separate power module with a 5:1
gear reducer and crank arm replacing the motor. To operate, simply
turn the crank. No clutch or engagement mechanism is required.
HAND CRANK REVOLUTIONS
Linear Rotary
(to move one inch/ (90° of rotation/
1000 lbs. of rated thrust) 1000 inch-lbs. of rated torque)
5 13
C.3 Limit Switches
Limit Switches provide a contact closure when an actuator or drive
reaches a predetermined point in its stroke. Although the switches
are typically set at the ends of stroke, most positions may be indi-
cated. Two types are available: an independent mechanical switch
or a PCP operated relay board.
C.3.1 Mechanical
The mechanical limit switches are independent devices and will
provide a limit indication regardless of the electric power status of
the unit. Up to four switches may be installed. On linear actuators,
they are GO style proximity switches mounted to the yoke legs.
On rotary actuators or drives, four switches are also available.
However, the first two are microswitches installed in the feedback
housing, while additional switches are GO style mounted adjacent
to the feedback housing.
For complete details, refer to Appendix E.
C.3.2 Electronic
The electronic limit switches utilize an auxiliary circuit board with
three relays. All wiring connections are made directly to this board.
An indicator LED shows the status (energized-ON) of each relay.
Two of the relays are configured in the SEtUP mode to activate upon
user defined stroke limits. The third relay (K3) is an alarm indicator.
This relay will change state (de-energize) anytime the actuator is
unable to follow the applied control signal.
See section C.4 for details concerning
the alarm relay.