ARI Armaturen ARI-PREMIO - Manual (Page 25)

0040501000 4511 Page 25
Operating and installation instructions
Thrust actuator ARI-PREMIO
5.5 Options and settings
5.5.1 Torque and travel switches
The thrust actuators are equipped with a load-dependent travel switch for the retracting
direction (S1), a load-dependent travel switch for the extending direction (S2) and a stroke-
dependent travel switch for the retracting direction (S3).
The load-dependent travel switches (S1, S2) switch-off the motor as soon as the factory-set
thrust force is attained.
The stroke-dependent travel switch (S3) switches off the motor as soon as the lift or stroke
is attained. If the thrust actuator is supplied on a straight through valve, the stroke-
dependent travel switch S3 is set in such a way that the motor of the thrust actuator is
switched off as soon as the maximum valve-lift is attained.
If the thrust actuator is supplied on a three-way valve, the trip cam belonging to travel
switch S3 is set in the retracting direction in the trip slide to such a downward extent that the
upper final position of the valve is attained prior to travel switch S3 being reached, thus
causing the load-dependent travel switch S2 to switch-off the motor.
For this function, all three switches reveal interlock-controlled circuitry on the board.
If the standard travel switches are to be integrated directly into the facility control system,
the standard board can be replaced by optional boards PA or NA (only 2.2-5kN).
5.5.2 Connection boards PA or NA (only 2.2 - 5 kN)
On connection boards PA or NA, the standard travel switches S11/S21, S12/S22 and S13/
S23 do not reveal interlock-controlled circuitry and can be integrated individually into the
facility control system.
The 3 contacts on each of the switches S11/S21, S12/S22 and S13/S23, designed as
double-throw contacts, are - in the case of these boards - brought out on terminals 40-48
and can be freely connected.
The switches on the PA optional board (standard-voltage connection board) are designed
for switching capacities of up to 10A, 250V AC.
The switches on the NA optional board (low-voltage connection board) are designed for
switching capacities of up to 0.1A, 4-30V (gold contacts).
ATTENTION !
- The thrust actuator may only be operated for a short time without the hood for
unavoidable setting operations to the potentiometers, travel switches and the
electrical options. While these operations are in progress, the thrust actuator
has hazardous, live, uninsulated parts exposed as well as moving and rotating
parts.
- Improper execution of the setting operations or lack of care may cause death,
grievous bodily injury or substantial property damage.
- Operation of the thrust actuator without the hood for any purpose other than
that described above is strictly prohibited.
ATTENTION !
- The settings of the load-dependent travel switches must on no account
whatsoever be changed!
- For the function of the stroke-dependent travel switch (S3), an optionally
available trip slide is necessary.