Honeywell mn7234 Manuale Utente

3

63-2587—1

The control signal and the corresponding rotation direction 

(clockwise or counterclockwise) can be selected using the 

rotation direction switch (see part Rotation direction switch in 

Fig. 2), thus eliminating the need to re-wire. To ensure tight 

closing of the dampers, the actuator has a total rotation stroke 

of 95°.

As soon as operating power is applied, the actuator may start 

to run. When power is removed, the actuator remains in 

position. For actuator-controller wiring instructions, see section 

“Wiring” on page 5.

If, while the actuator is not rotating, the user declutches it and 

manually repositions the shaft adapter, the feedback signal will 

then follow the new position at which the shaft adapter has 

been left.

In case the power to the actuator fails, after re-applying power, 

the actuator acknowledges its present position and follows the 

signal from the controller. This makes it unnecessary for the 

actuator to employ autoadaption in order to re-map the control 

signal settings.

The actuators are equipped with two dip switches accessible 

after removing the access cover (see Fig. 4).

In its default shipping position, the autoadapt dip switch for 

normal operation is set to ON as shown in Fig. 4. Dip switches 

(view with PCB at bottom)4. If it is set to OFF, no autoadapting 

is performed, and the control signal map remains constant.

The autoadapt functionality does not have to be triggered. 

Rather, the SmartAct actuator does this automatically when the 

min. and max. control signals are provided (see Fig. 5); the 

feedback signal is likewise autoadapted.

In order to make use of the autoadapt functionality, proceed as 

follows:

1. Set the autoadapt dip switch to the ON position.

2. If necessary, limit the stroke to the desired range using 

the mechanical end limits.

3. Drive the actuator to the left end limit (totally counter-

clockwise) by setting the control signal as specified in 

Table 1. Feedback/control signal values1.

4. Drive the actuator to the right end limit (totally clockwise) 

by setting the control signal as specified in Table 1. 

Feedback/control signal values1. The stroke has now 

been limited to 0...100% of the control signal range.

Y=2

/2...10V

U = 2 V

U = 10 V

Y=0

/0...10V*

U = 0 V

U = 10 V

Y=0

/10...0V

U = 10 V

U = 0 V

Y=2

/10...2V

U = 10 V

U = 2 V

* Default shipping position.

autoadapt dip switch for

normal operation (

)

voltage/current control signal

dip switch (

)