Position After Failure; Principles Of Operation; Solenoid Valve - Emerson EL-O-Matic F Series Installation, Operation And Maintenance Manual

Section 4: Installation
September 2015
4.2.2

Position After Failure

The position of the actuator after a failure depends on the:
1.
2.
3.
Table 5.
Principle of
Operation
Double-Acting
Actuator
Single-Acting
(Spring-Return)
Actuator
4.3

Principles of Operation

4.3.1

Solenoid Valve

All actuators can be either piped with solid or flexible tubing with the solenoid valve
mounted remotely from the actuator or by mounting a VDI/VDE 3845 (NAMUR) designed
solenoid valve DIRECTLY onto the NAMUR mounting pad on the side of the actuator
Figure 4
8
Principle of operation (see paragraph 4.3)
Assembly codes (see paragraph 4.4)
Kind of failure. Refer to the table below.
Position After Failure
Assembly Code Kind of Failure
CW
CW
Typical solenoid operation
Spring-Return Operation
A
Installation, Operation and Maintenance Manual
Pressure
Signal
Supply Voltage
Pressure
Signal
Supply Voltage
Pressure
Signal
Supply Voltage
Pressure
Signal
Supply Voltage
Double-Acting Operation
DOC.IOM.EF.EN Rev. 6
Position
Not defined
Closed
Closed
Not defined
Open
Open
Closed
Closed
Closed
Open
Open
Open
A B
Installation