Emerson Tescom ER5000 Series, User Manual, Page: 39 / 248

ER5000 —
39
Typical Application
The ER5000: Typical Application
(Non-Hazardous Location)
WARNING
Investigate and apply the most recent standards for Hazardous Locations
for your area set by ANSI, ISO and OSHA, as well as all electrical codes and
fire and safety standards, to determine if your application will require
a Hazardous Location model. If your application requires a Hazardous
Location model (ER5050), refer to
Installing a Hazardous Location
Model (ER5050) on page 110 .
Controlling System Pressure
In a typical application, the Outlet Port of the ER5000 connects
to the top of a
Dome Loaded or Air Actuated pressure reducing
Regulator , usually through the included 1/2" SAE x 1/8" NPTF
adaptor. This is shown in Figure 4.
Supply Pressure of up to 120 psig / 8.2 bar, with 110 psig / 7.5 bar
being typical, is provided to the ER5000 by an external source.
The ER5000 increases
Pilot Pressure to the air actuator of the
regulator by opening the Pulse Width Modulation (PWM) solenoid
valve at the Inlet Port and reduces pilot pressure by opening the
PWM solenoid valve at the Exhaust Port. Normally, the exhaust
vents to atmosphere.
The controller, configured in External Feedback mode, senses
System Pressure through input from a transducer mounted
downstream in the Process Line .
ER5000 Supply
Pressure
110 psig / 7.5 bar
Adaptor
External
Transducer
USB
Connection
PC
Inlet Pressure
Outlet Pressure
To Process
Regulator
Figure 4: Typical ER5000 Application
Controller, with adaptor, is mounted to an air actuated regulator. Feedback is from the external
transducer. Setpoint is from a Profile downloaded from the PC through the USB connection.