172-65316M-08 (MB12A/MB12AF/MB12B/MB12BF) 7 Oct 2021
13
Wiring Procedures (Optional Relay (Energize to Close Type) + Auxiliary
Contact Model)
1. Connect the ON/OFF control switch as shown in the following diagrams.
•
When electricity flows through T1 and T3: As viewed from above, left rotation
for the valve fully closed when stopped.
•
When electricity flows through T2 and T3: As viewed from above, right rotation
for the valve fully open when stopped.
2. Auxiliary contact operation is shown below.
The example below uses the pilot lamps.
Open: Lit when valve is fully open
Not Open: Lit when valve is not fully open
Closed: Lit when valve is fully closed
Not Closed: Lit when valve is not fully closed
3. When checking the operation of the actuator unit before installing in the piping,
keep fingers well clear of the valve section.
4. Connect the electrical ground to the terminal block mounting screw on the
actuator unit.
NOTE:
•
Excessively long controller wiring may lead to malfunction due to induction voltage.
If this occurs, install a relay near the motorized valve; use the relay contact for the
controller or install a resistor between terminals T1 and T3. Contact TLV for details.
•
The auxiliary contact closed signal is sent when the valve reaches 5
°
before the
fully closed position. The auxiliary contact opened signal is sent when the valve
reaches 5
°
before the fully opened position.
Control Switch
AC
Power
Source
Internal Circuitry
AC/DC
Power
Source
