Flowserve 10-40 39 Access M Worcester Controls - Manual (Page 4)

4 10-40 39 Access M Mounted Limit Switch (Proximity Sensor) and Solenoid WCAIM2034
A. Limit Switch Ratings:
DPDT - 10 amps @ 125/250 VAC; .3 amps @ 125 VDC.
SPDT - 15.1 amps @ 125/250 VAC; .5 amps @ 125 VDC.
Make electrical connections in accordance with the
appropriate wiring diagram on inside of cover or on the
following pages.
B. Proximity Sensor Ratings: 5-200 mA, 20-140 VAC, 10-140
VDC, current leakage <.8 mA, sensing range 2 mm, switch
frequency 25 Hz, not sensitive to polarity.
a WARNING: A load must be used when power is applied to
sensors. Wiring without a load will cause sensor failure. (The load
must draw a maximum of 200 mA at working voltage.)
9. Cover Assembly:
Place the lubricated O-ring down over the threaded section of the
housing onto the machined shoulder. The cover must be threaded
onto housing tightly for proper performance. The assembly is
now complete.
NOTE: For units with a metal cover, a light coat of grease (such as a
#1 grease) shall be applied to the cover threads. A minimum of
1 /
3
the
circumference of the threads to be lubricated.
10. Control Block/Air Connection Block:
If control or air connection block is removed, be sure appropriate
gasket is properly inserted between block and switch base (see
Figure 1 on page 9 and Access exploded view). NOTE: If block
gasket removed (with or without small black block plug) differs
from those illustrated, replace with new style or note orientation
for proper reassembly. Do not apply any grease to gasket, it must
be installed dry.
11. Air Supply Connection:
Connect air supply to 1 /
4
" NPT connection on control block. For
units with no integral solenoid valve, air connection block has two
1 /
4
" NPT connections for inlet air (only one used for spring return
units).
12. Operation:
A. Double-Acting with Control Block – Air is supplied to the 1 /
4
"
NPT port on the block. When the solenoid is energized, the
spring-loaded plunger is withdrawn, allowing the supply air to
shift the spring-loaded spool within the block, which opens
the supply path to the center chamber of the actuator. Air
from the end chambers of the actuator is allowed to pass
through the block and exhaust to atmosphere.
When the solenoid is de-energized, the spring-loaded plunger
blocks the flow of air to the spool seal within the block and
the spool spring shifts the spool within the block to a position
which opens the supply path to the end chambers of the
actuator. Air from the center chamber of the actuator is
allowed to pass through the block and exhaust to
atmosphere.
Flow Control
Worcester Controls