Instruction Manual
D200126X012
2502 Controllers
June 2017
11
Figure 8. Displacer and Displacer Rod Connections
W0228‐1A
DISPLACER ROD
DISPLACER
SPUD
ALL OTHER TYPES
COTTER SPRING
LOCKING NUTS
DISPLACER SPUD
DISPLACER
STEM EXTENSION
DISPLACER ROD
COTTER SPRING
W9357
249VS SENSOR
Supply Pressure
WARNING
Do not overpressurize any system component. Personal injury or property damage may occur due to sudden pressure
release or explosion. To avoid damage, provide suitable pressure‐relieving or pressure limiting devices if supply pressure
can exceed the maximum supply pressure listed in table 1.
Personal injury or property damage may occur from an uncontrolled process if the supply medium is not clean, dry, oil‐free,
or non‐corrosive gas. While use and regular maintenance of a filter that removes particles larger than 40 micrometers in
diameter will suffice in most applications, check with an Emerson Automation Solutions field office and industry
instrument air quality standards for use with corrosive gas or if you are unsure about the proper amount or method of air
filtration or filter maintenance.
CAUTION
Do not use sealing tape on pneumatic connections. This instrument contains small passages that may become obstructed
by detached sealing tape. Thread sealant paste should be used to seal and lubricate pneumatic threaded connections.
Standard 2502 controllers come complete with supply and output pressure gauges and an integrally mounted 67CFR
filter regulator to reduce supply pressure from a maximum of 17.3 bar (250 psig) to the 1.4 or 2.4 bar (20 or 35 psig)
required. This regulator has built‐in relief and a standard 5‐micrometer filter to remove particles from the supply
source.
The output pressure connection is on the back of the controller case (figure 3). Pipe the supply pressure to the in
connection of the regulator mounted to the case back. Provide a clean, dry, and noncorrosive air or gas supply to the
controller.
After pressure connections have been made, turn on the supply pressure and check all connections for leaks.
