Koso REXA Electraulic Xpac, Installation And Operation Manual

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REXA
Electraulic Actuators & Drives
Xpac
Installation Manual -- Version 5.1 (5/08)
7
1.5 Optional Equipment
(see Appendices)
The Xpac is available with a substantial list of optional equipment.
Most items can be field retrofitted. Consult your local sales repre-
sentative for details.
1.5.1 Position Transmitter
(see Appendix C.1)
The position transmitter provides a loop powered two-wire 4-20 mA
signal that is proportional to actuator position. The transmitter's
output is optically isolated from the electronics. Both an active and
passive transmitter are available. A passive position transmitter is
similar to other two-wire transmitters in that an external DC power
source is required. An active two-wire transmitter with its own 24
VDC power supply is available.
1.5.2 Manual Override
(see Appendix C.2)
A declutchable handwheel connects to the outboard end of the mo-
tor shaft. Since the handwheel utilizes the same hydraulic circuit as
the motor, the required torque is low. On actuators with high thrust
or torque or long strokes, a
5
/
16
" hex drill drive may be substituted
for the handwheel or a 5:1 geared hand crank on a separate power
module is available.
1.5.3 Limit Switches
(see Appendix C.3)
Limit switches are either yoke mounted or PCP mounted. Yoke
mounted switches are activated by the actuator shaft and function
independently. The PCP mounted switches are activated electrically
and include an alarm relay.
1.5.4 Alarm Relay
(see Appendix C.4)
The PCP is able to perform various diagnostic functions. If the ac-
tuator cannot follow the control signal, the alarm relay will change
state to provide remote indication. The alarm relay is included on
the position transmitter and PCP mounted limit switches.
1.5.5 Surge Control
(see Appendix S)
By utilizing a spring, solenoid and solid state relay, the
Xpac
can
provide very high speed motion in one direction. The position can
be to any intermediate point or strictly to the end (trip).
The alarm relay will change state upon
power failure or removing the unit
from automatic (Auto).