4200 Series Transmitters
Instruction Manual
Form 5596
July 2005
9
Long Stroke Sliding-Stem Type 585CLS
and 490 Actuator Mounting, Types 4220,
4221, and 4222
Use the following general procedures and figure 23
to mount the transmitter on long stroke sliding-stem
Type 585CLS and 491 actuators with 229 to 610 mm
(9 to 24 inches) travel.
CAUTION
To avoid damaging the potentiometer
after the transmitter is mounted, do
not stroke the actuator without first
loosening the socket screw set
(key 100F) that fastens the coupling
(key 100E) to the potentiometer shaft
(key 5).
1. Stroke the actuator to mid-stroke.
2. Bolt the cable clip (key 61) to the stem connector
on the actuator stem. To do this, first replace the
existing stem connector cap screws with a stud (key
35). Slide the cable clip (key 61) over the stud
(key 35) before installing the nuts (key 73). Tighten
the nuts.
3. If necessary, refer to the appropriate actuator
instruction manual for the procedure to reconnect
the actuator stem to the valve stem.
4. Attach the cable transducer housing (key 100A)
to the mounting plate (key 63) using cap screws
(key 103) and hex nuts (key 104).
5. Attach the mounting plate to the actuator using
hex head cap screws (key 75). Note: Some
actuators may require spacers (key 101) between
the mounting plate (key 63) and the actuator.
CAUTION
Free release of the cable (key 100B)
will damage the transducer. Whenever
the cable (key 100B) is extended, take
steps to ensure that free release does
not happen.
6. Carefully pull the cable (key 100B) down to the
cable clip (key 61) and attach it with the socket head
cap screw (key 102), the lock washer (key 83) and
the nut (key 72).
7. Remove the four cap screws (key 100D) and the
mounting plate (key 100C) from the cable
transducer.
8. Mount the mounting plate (key 100C) to the
transmitter using cap screws (key 105).
9. Verify that the actuator is still in the mid-stroke
position. Loosen the socket cap screws (key 100F)
and rotate the coupling until the socket cap screws
(key 100F) can be accessed with a hex wrench
through one of the openings in the cable transducer
housing (key 100A). Lock the coupling in place by
tightening the inboard socket cap screw (key 100F).
10. Turn the potentiometer shaft (key 5) to the
midpoint of it’s range.
11. Carefully install the transmitter to the cable
transducer housing (key 100A) making sure that the
potentiometer shaft (key 5) slides freely into the
coupling (key 100E) and remains in the midpoint
position. Reinstall the four cap screws (key 100D).
12. Lock the coupling (key 100E) to the
potentiometer shaft (key 5) by tightening the outer
socket cap screw (key 100F).
13. Install the lower yoke cover (key 69) on to
actuator yoke with pan head machine screws (key
77) and washers (key 86).
14. Perform the electrical connections.
Electrical Connections
Note
For intrinsically safe installations, refer
to loop schematics or to instructions
supplied by the barrier manufacturer
for proper wiring and installation.
Conduit
Install conduit using local and national electrical
codes which apply to the application.
WARNING
For explosion-proof applications,
install a suitable conduit seal no more
than 460 mm (18 inches) from the
transmitter. Personal injury or property
damage may result from fire and
explosion if the seal is not installed.
Field Wiring
Figure 4 shows typical field wiring connections into
the field wiring compartment. The transmitter is
powered by 24 volts dc. Refer to table 1 to
