4150K and 4160K Series
7
Table 5. Supply Pressure Requirements
OUTPUT
NORMAL OPERATING SUPPLY
MAXIMUM ALLOWABLE SUPPLY
PRESSURE TO PREVENT INTERNAL
OUTPUT
SIGNAL RANGE
NORMAL OPERATING SUPPLY
PRESSURE
(1)
PRESSURE TO PREVENT INTERNAL
PART DAMAGE
Psig
3 to 15 or 0 and 20 (differential gap)
20
40
Psig
6 to 30 or 0 and 35 (differential gap)
35
40
Bar
0.2 to 1.0 or 0 and 1.4 (differential gap)
1.4
2.8
Bar
0.4 to 2.0 or 0 and 2.4 (differential gap)
2.4
2.8
1. If this pressure is exceeded, control may be impaired.
Table 6. Common Signal Pressure Conversions
Psi
kPa
bar
kg/cm
2
Mps
3
5
6
7
9
20
(1)
35
40
(1)
50
60
0.2
(2)
0.3
0.4
0.5
0.6
0.2
0.3
0.4
0.5
0.6
0.02
0.03
0.04
0.05
0.06
11
12
14
15
18
75
80
95
100
(1)
125
0.8
0.8
1.0
1.0
(2)
1.2
0.8
0.8
1.0
1.0
(3)
1.3
0.07
0.08
0.09
0.10
0.12
20
22
25
27
30
140
150
170
185
200
(1)
1.4
1.5
1.7
1.9
2.0
(3)
1.4
1.5
1.8
1.9
2.0
0.14
0.15
0.17
0.18
0.20
32
33
35
50
80
220
230
240
345
550
2.2
2.3
2.4
3.4
5.5
2.2
2.3
2.5
3.5
5.6
0.22
0.23
0.24
0.34
0.55
100
150
690
1035
6.9
10.3
7.0
10.5
0.69
1.03
1. Values as listed in ANSI/S7.4.
2. Values as listed in IEC Standard 382.
3. Values rounded to correspond with kPa values.
The pressure connections to the controller depend
upon the type of pressure sensing, gauge or differen-
tial. Gauge pressure controllers use either a Bourdon
tube or bellows as the sensing element, as indicated in
table 2. Differential pressure controllers use two bel-
lows to sense differential pressure.
For gauge pressure instruments: The control pres-
sure block (key 8 in figure 19) has two connections.
Process pressure can be connected either to the
CONTROL connection on the back of the case, or to
the connection on the left side of the case, shown in
figure 3, depending on the instrument application. Plug
the unused connection.
For differential pressure instruments: Connect the
low pressure line to the CONTROL connection on the
side of the case and the high pressure line to the
CONTROL connection on the back of the case as
shown in figure 3.
When installing process piping, follow accepted prac-
tices to ensure accurate transmission of the process
pressure to the controller or transmitter. Install shutoff
valves, vents, drains, or seal systems as needed in
Figure 4. Actuator Mounting
48B6020-A / DOC
SUPPLY PRESSURE
REGULATOR
SUPPLY PRESSURE
REGULATOR
38B6021-A / DOC
the process pressure lines. If the instrument is located
such that the adjacent process pressure lines will be
approximately horizontal, the lines should slope down-
ward to the instrument for liquid-filled lines and upward
to instruments for gas-filled lines. This will minimize
the possibility of air becoming trapped in the sensor
with liquid-filled lines or of condensation becoming
trapped with gas-filled lines. The recommended slope
is 1 inch per foot (83 mm per meter).
If a controller is being used in conjunction with a con-
trol valve to control pipeline pressure, connect the pro-
