Remote Set Point (Suffix Letter M) Pressure Connection; External Feedback Pressure Connection (4195Kb Controllers Only) - Emerson Fisher 4195KA Instruction Manual

Instruction Manual
D200160X012
Supply pressure medium must be clean, dry, and noncorrosive and meet the requirements of ISA Standard 7.0.01 or
ISO 8573-1. A maximum 40 micrometer particle size in the air system is acceptable. Further filtration down to 5
micrometer particle size is recommended. Lubricant content is not to exceed 1 ppm weight (w/w) or volume (v/v)
basis. Condensation in the supply medium should be minimized.
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.

External Feedback Pressure Connection (4195KB 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).
Figure 2‐5. Connection Locations
1/4‐18 NPT CONTROLLER
OUTPUT CONNECTION
NOTES:
1 1/4‐18 NPT PROCESS CONNECTION (MARKED A) FOR ALL BOURDON TUBE CONTROLLERS AND FOR THOSE CAPSULAR
ELEMENT CONTROLLERS USED IN VACUUM PRESSURE APPLICATIONS.
2 1/4‐18 NPT PROCESS CONNECTION (MARKED B) FOR CAPSULAR ELEMENT CONTROLLERS USED IN POSITIVE AND COMPOUND PRESSURE APPLICATIONS.
3 FOR THE EXTERNAL FEEDBACK CONNECTIONS (4195KB CONTROLLERS ONLY), EITHER THE A OR B CONNECTION IS USED, DEPENDING ON THE
LOCATION OF THE PROCESS CONNECTION.
46A9765‐A
A2892‐4
260 130
(5.13)
(10.25)
330
(13.00)
FRONT VIEW
1/4‐18 NPT
SUPPLY PRESSURE
CONNECTION
(5.80)
66
(2.56)
31
(1.22)
1/4‐18
NPT VENT
1/4 NPT 4 HOLES
CONNECTION
BOTTOM VIEW
102
(4.00)
51
5/16
(2.00)
UNC‐28
3 HOLES
(MOUNTING)
3.44
(87)
10.04
(255)
REAR VIEW
147
1/4 NPT
REMOTE SET POINT CONNECTION
TOP VIEW
4195K Controllers
July 2018
mm
(INCH)
13