Failure Modes; Failure Modes - Double Acting; Changes For Reverse Acting; Modes De Panne - EL-O-MATIC F20 Manual De Instalación Y Operación

5.0

Failure Modes / Modes de panne / Modos de fallo

Input
signal
actuator
1 A
2 B
Direct acting
5.0
Input
signal
actuator
1 A
B
2
Reverse acting
5.1
5.2
Rotary Linear
actuator
B
A
Close
Rotary Linear
actuator
B
A
Close
- Jumper setting
"Action"
- Jumper Einstellung
"Wirkungsweise
- Jumper instelling
"Werkwijze"
Action "Direct"
Action "Directe"
Acción "Directo"
Action "Reverse"
Action "Inversée"
Acción "Inverso"
20
5.1

Failure Modes - Double acting

The standard setup for double acting actuators is so that an
increasing input signal opens the valve. Signal failure, then,
moves the valve to the closed position . This may be changed
to "Open on signal failure" by changing the setup to REVERSE
ACTING.
The effect of signal and air failure depends on the way the air
connections and the potentiometer connections are made:
1. Direct acting - Standard Setup
Action Air failure
Direct Position not defined
2. Reverse acting
Action Air failure
Reverse Position not defined

5.1.1 Changes for Reverse Acting

To change from the standard setup to reverse acting:
1. Change the tubing (see fig. 5.1).
2. Remove the cover.
3. Change the action jumper setting by setting both jumpers to
the right side (see fig. 5.2).
4. Replace the cover taking care that the "O" ring seal is in
place and the fixing screws are tightened correctly.
Potentiometer jumper setting =
Le positionnement du cavalier de potentiomètre =
El ajuste del puente del potenciómetro.
Signal failure
Closed
Signal failure
Open
DOC,F20,EFS Rev.: -