Wiring, Caution – Honeywell ML6420 User Manual

Page 4

ML6420, ML7420 NON-SPRING RETURN ELECTRIC LINEAR VALVE ACTUATORS

63-2533—03

Fig. 2. Attaching actuator to valve collar.

Fig. 3. Securing actuator to valve.

Fig. 4. Removing actuator cover.

Wiring

CAUTION

Electrical Shock or Equipment Damage Hazard.

Can shock individuals or short equipment circuitry.

Disconnect power supply before installation.

All wiring must comply with local electrical codes, ordinances

and regulations. Voltage and frequency of the transformer

used with the actuator must correspond with the power supply

and actuator characteristics. See Fig. 6 through 11 for typical

wiring hookups.

1. Feed power and control wires through the conduit

connector located on the bottom of the actuator case.

See Fig. 5.

CAUTION

Equipment Damage Hazard.

Conduit connection or removal can break an

unsupported connector.

When removing or attaching conduit, use a wrench to

support the motor connector.

2. Using the wiring diagram in Fig. 6, connect power and

control wires. Make sure that all wiring is correct.

3. For ML7420 only: Check the selector plugs for proper

settings. See Signal Input Failure section for details.

4. When wiring is complete, replace the actuator cover. See

Fig. 7.

5. Apply power and control signals to the actuator.

Fig. 5. Connecting power and control wiring.

Fig. 6. ML6420 wiring.

M6632

M6633

M17420

M6630

WIRING

STRIP

T1
T2

(HOT)
L2

T
Y

ML6420A,B

POWER SUPPLY. PROVIDE DISCONNET MEANS

AND OVERLOAD PROTECTION AS REQUIRED.

ALL WIRING BLOCKS HAVE THE SAME

NUMBER OF TERMINALS (8), BUT THE ONLY

TERMINALS THAT ARE ACTIVE ON THIS

BLOCK ARE T1, T2, W, AND B.

THE T-Y-G TERMINALS ARE A THREE TERMINAL

WIRING BLOCK SEPARATE FROM THE MAIN

BLOCK. THEY DO NOT APPEAR ON ALL MODELS

BECAUSE THEY ARE FOR A SINGLE FEEDBACK

POTENTIOMETER (10K OR 220 OHMS). THE

REQUIRED WIRING BLOCKS ARE PART OF

THE POTENTIOMETER ACCESSORY KITS.

MOTOR OPEN SIGNAL DRAWS VALVE STEM

UPWARDS. MOTOR CLOSE SIGNAL DRIVES

VALVE STEM DOWNWARDS.

T6984 (FLOATING CONTROLLER)

M32766

MOTOR OPEN
MOTOR CLOSE

COMMON

24 Vac

This manual is related to the following products:

ML7420