5/12/2017
TECH-538/D.W.O. 23160
Page 29 of 189
Single Acting Actuator (Spring Return):
For single acting actuators Outlet
Port 2
is the preferred Port to be
plugged
.
Outlet Port 1 is to be piped to the actuator inlet port that acts against the spring (increasing setpoint
signal causes pressure to increase in Outlet Port 1 of the positioner.
Therefore, without any other software adjustment, increasing setpoint signal causes pressure to decrease
in Outlet Port 2 of the positioner.
Double Acting Actuator (Double Return):
For double acting actuators Outlet Port 2 is piped to drive the actuator towards the fail position.
Outlet Port 1 is piped to drive the actuator away from the fail position (increasing setpoint signal causes
pressure to increase in Outlet Port 1 of the positioner and pressure to decrease in Outlet Port 2 of the
positioner).
On loss of electrical power Outlet Port 1 has zero pressure and Outlet Port 2 has full pressure.
Attention:
Air supply to the positioner must be clean, dry, oil free instrument air per ANSI/ISA-
7.0.01 -1996 and ISO 8573-1 – 2010 or later. See reference values in the
Table 5:
Maximum Particle Size and Concentration of Solid Contaminants
Class
Maximum Particle Size (Microns)
Maximum Concentration (mg/m
3
)
3
5
5
Table 6
: Maximum Oil Content
Class
Maximum Concentration (mg/m
3
)
3
1
Maximum supply pressure:
ICoT 5400 : 120 psi
ICoT 6400 : 80 psi.
Pneumatic connections:
1/4” NPT or BSP for standard flow manifold
3/8” NPT or BSP for High Flow manifold.
