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Non-Standard Stroke - Honeywell 3 Nm Series Installation Instructions Manual

Spring return direct coupled actuators
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3 NM, 5 NM SERIES SPRING RETURN DIRECT COUPLED ACTUATORS
If the coupling must be moved from one side of the actuator to
the other, reverse the spring return direction and flip the
actuator. Follow these instructions (see Fig. 3):
1. Remove the retainer clip from the shaft coupling and set
it aside for later use.
2. Remove shaft coupling from one side of the actuator.
3. Replace the shaft coupling on the opposite side of the
actuator aligning it based on the stroke labeling.
4. Replace the retainer clip on the shaft coupling using the
groove of the coupling.
Fig. 3. Mounting shaft coupling to actuator opposite side.
Selecting Actuator Control Signal
Selections are made using a dial that appears on both the
front and back of the actuator (see Fig. 4).
To select the control signal simply turn the mode selection dial
to the desired mode (as indicated on the device label) without
exceeding range indicators.
0
0
90
90
1
1
.5
.5
45
45
AUX
AUX
0
0
6
6
5
5
1
1
4
4
2
2
Spring
Spring
Return
3
3
MODE
MODE
Return
Fig. 4. Dials for control signal and switch or minimum
Auxiliary Knob
The auxiliary knob can be used to control minimum position
(MS74 Series) or switch position.
SELECT MINIMUM POSITION (MS74 SERIES)
To set the actuator minimum position, turn the AUX dial to the
desired position. Alternatively, minimum position can be set
with an externally connected 1kOhm potentiometer connected
across common (terminal 2) and minimum position (terminal
4); the setting on the AUX dial will be overridden.
62-0274—07
AUXILIARY KNOB
MS74 SERIES
MS31 SERIES
MODE SELECT
MODE SELECT
MODE SELECT
1 = 2... 10 VDC
1 = 2...10 VDC
1 = ADDRESS 11
2 = 10... 2 VDC
2 = 10...2 VDC
2 = ADDRESS 12
3 = 0... 10 VDC
3 = 3K OHM NTC
3 = ADDRESS 13
4 = 10... 0 VDC
THERMISTOR
4 = ADDRESS 14
5 = FLOATING (FWD)
4 = 3 POSITION
5 = ADDRESS 15
6 = FLOATING (REV)
5 = FLOATING
6 = TEST
(FWD)
6 = FLOATING (REV)
position.
SELECT SWITCH POSITION
For switch models, select the degree of rotation you want the
switch to activate.

Non-Standard Stroke

Mechanical Stroke Limit Reduction
For applications requiring a span less than 95 degrees, a
simple adjustment can be made. When the rotational
mounting of the shaft coupling is changed, the actuator drives
less than the full 90 degrees stroke.
The stroke is adjustable in 5 degree increments. Once
adjusted, the actuator drives until the shaft coupling reaches
the mechanical stop (part of the housing). The stop causes
the motor to discontinue driving and the shaft coupling drives
no farther. When the actuator returns, it stops at the fail-safe
position.
To limit the stroke range, proceed as follows:
1. Remove the retainer clip from the shaft coupling and set
it aside for later use.
M27714
2. Remove shaft coupling from the actuator.
3. Rotate the coupling to the desired position, aligning it
based on the stroke labelling. See Fig. 5.
NOTE: The shaft coupling location determines the
EXAMPLE:Setting shaft coupling to an approximate
4. Install the shaft coupling at this position.
5. Replace the retainer clip on the shaft coupling using the
groove of the coupling.
M32676
Mounting
CAUTION
Device Malfunction Hazard.
Improper shaft coupling tightening causes device
malfunction.
Tighten shaft coupling with proper torque to prevent
damper shaft slippage.
4
travel span.
fail-safe position of 35 degrees (as indicated
on the housing) limits stroke to 60 degrees.
(See Fig. 5)
45
45
6
Fig. 5. Stroke reduction.
M27716

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