4195KA, KB, KC, and KS Controllers
Instruction Manual
Form 5207
April 2007
2-4
Supply Pressure Connection
WARNING
Severe personal injury or property
damage may occur if the instrument
air supply is not clean, dry and
oil-free, or noncorrosive gas. While
use and regular maintenance of a filter
that removes particles larger than 40
microns in diameter will suffice in
most applications, check with an
Emerson Process Management 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.
Supply pressure must be clean, dry air or
noncorrosive gas that meets the requirements of
ISA Standard S7.3. Use a suitable supply pressure
regulator to reduce the supply pressure source to
the normal operating supply pressure shown in table
1-6. Connect supply pressure to the SUPPLY
connection on the bottom of the case, shown in
figure 2-5.
Remote Set Point (suffix letter M)
Pressure Connection
If the controller has remote set point (suffix letter M),
connect the remote set point pressure to the top of
the controller case at the location shown in figure
2-5. Use clean, dry air or noncorrosive gas. Use a
0.2 to 1.0 bar (3 to 15 psig) remote set point
pressure range for a 0.2 to 1.0 bar (3 to 15 psig)
controller output signal range or a 0.4 to 2.0 bar (6
to 30 psig) remote set point pressure range for a 0.4
to 2.0 bar (6 to 30 psig) controller output signal
range. If pressure is supplied to the remote set point
connection with a regulator, a small bleed orifice
should be placed between the regulator and remote
set point connection to prevent pressure variations
due to regulator lock-up.
260
(10.25)
102
(4.00)
130
(5.13)
51
(2.00)
330
(13.00)
3.44
(87)
10.04
(255)
5/16
UNC-28
3 HOLES
(MOUNTING)
1/4-18 NPT
CONTROLLER OUTPUT
CONNECTION
1/4-18 NPT
SUPPLY PRESSURE
CONNECTION
1/4 NPT
REMOTE SET POINT
CONNECTION
147
(5.80)
66
(2.56)
31
(1.22)
1/4 NPT 4 HOLES
1/4-18
NPT VENT
CONNECTION
mm
(INCH)
FRONT VIEW
REAR VIEW
BOTTOM VIEW
TOP VIEW
NOTES:
1/4-18 NPT PROCESS CONNECTION (MARKED A) FOR ALL
BOURDON TUBE CONTROLLERS AND FOR THOSE CAPSULAR
ELEMENT CONTROLLERS USED IN VACUUM PRESSURE APPLICATIONS.
1/4-18 NPT PROCESS CONNECTION (MARKED B) FOR CAPSULAR
ELEMENT CONTROLLERS USED IN POSITIVE AND COMPOUND
PRESSURE APPLICATIONS.
FOR THE EXTERNAL FEEDBACK CONNECTIONS (4195KB CONTROLLERS
ONLY), EITHER THE A OR B CONNECTION IS USED, DEPENDING ON THE
LOCATION OF THE PROCESS CONNECTION.
1
46A9765-A
A2892-4 / IL
2
3
Figure 2-5. Connection Locations
External Feedback Pressure Connection
(4195KB Series Controllers Only)
When a secondary controller in an override
application has this option, reset windup is
minimized in the secondary controller. Connect the
external feedback connection of the secondary
controller to the output of the customer-supplied high
or low select relay (see figures 2-5 and 4-9).
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