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Operation - Honeywell 4000 Series Product Data

Direct coupled valve actuators
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Wiring
ML_984 actuators are designed to operate from a Safety Extra Low Voltage, Class II power source. A 7/8" wiring hole
is provided for attaching flexible conduit where required by local codes. When installing outdoors, weatherproof conduit
fittings approved for outdoor and wet locations must be used.
Electrical Shock or Equipment Damage Hazard. Can Shock individuals or short equipment circuitry.
Disconnect power supply to the actuator to prevent electrical shock and equipment damage, or remove and cap the air
line to the actuator.
(in all cases when wiring a ML_984 Actuator)
In multiple actuators connection, power supply to all actuators must be connected in a TRUE parallel fashion to reduce
excessive voltage drop. DO NOT "daisy chain" i.e. connected to one actuator then branched to another.

Operation

The recommended valve actuator power source is a Safety Extra-Low Voltage (SELV) Class II, 24V transformer or
regulated 28Vdc across terminals T5 & T6. Internal circuitry provides dc power for the electronic sensing and drive
motor circuits.
2
1
FIG. 7A — 3-WIRE CONTROL OF ML6984 WITH
SERIES 60 CONTROLLER
2
1
FIG. 7A — 3-WIRE CONTROL OF ML6984 WITH
ELECTRONIC CONTROLLER
For Figures 7A, 7B and 7C the following apply:
Power supply provides overload protection and disconnect means.
1
Allow 0.5 amps maximum for each device. Actuators and controller can share same transformer
2
providing the VA rating of the transformer is not exceeded and proper phasing is observed.
3
SPDT controller can be a low voltage Series 20 "on-off" or Series 60 "floating" (tri-state) type.
Multiple actuators controlled by a common controller in parallel must be wired so that they all travel in the
4
same direction. Reverse acting actuators will NOT operate reliably in combination with direct acting
units.
5
5-wire installation is required with the 272630E feedback/auxiliary relay accessory.
3
Typical SPDT Controller
W
B
R
FIG. 7B — 5-WIRE CONTROL OF ML 6984
5
ML6984 Wiring
4
2
ML6984
W
T6
24 Vac
R
T5
B
OR
28 Vdc
T6
4
T5
ML6984
W
T6
R
T5
B
L1
1
L2
+

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This manual is also suitable for:

Ml6984Ml7984