The original Siemens thyristor regulators are no longer available. Regarding pin dimensions and functions, our newly developed and redesigned devices are fully compatible with the original, and can be installed/replaced “plug-and-play”in the existing location.
With an output rating of 1.1 kW, the units are mounted in a 100 mm ½-19-inch plug-in rack, are used for step operation of motor actuators by means of DC signals from a step driver module.
The open-frame construction is designed for natural convection cooling in a control cabinet with a 50% overload rating, and an ambient temperature of max. 60°C.
The unit works as an electronic 3-phase reversal switch operated by positioning pulses and with an automatic DC brake.
The rotation direction of the connected AC actuator motor is determined by thyristor-controlled phase switching between L1 and L3.
Hereby, the respective rotation (RL-LL) and actuation of the DC brake are indicated by signalling LEDs in the front panel.
The DC brake is actuated for a duration of 70 ms after every positioning pulse.
The logical input conditions for RL-LL control are mutually locked.
A signal change at only one of the logic inputs during operation does not cause a change in the actuators rotation direction.
Interference pulses are suppressed.
A superordinate blocking input is provided in the rotation direction logic.
If a blocking input is set during operation, the actuator will be operated, but without the DC brake.
Moreover, the blocking input will interrupt any braking sequence.
As soon as the automatic DC brake is triggered after every positioning pulse,
the preset braking sequence will start when the preset turn-off time for the thyristors has expired. Hereby, a thyristor chain is operated as a rectifier for 70 ms using phase-angle control, so that the motor winding generates a static magnetic field, which brakes the rotor.
If the input condition for the rotation direction changes directly, the electronic brake is not triggered between the positioning pulses.
Furthermore, the control unit monitors phases L2 and L3, the system voltage, and fuse F1. In case of a fault, and output signal is set.
The required signal voltage must be supplied externally.
For energising a thermal motor protection circuit with a thermistor type 3UN8104, a voltage of 230 VAC is provided at the power output.
Samples are available ex stock.
|Supply voltage||400V AC; 3Ph|
|Output rating||1.1 kW for 3-phase induction motors or standard 4-pole motors|
|Input, logic signal||24 V level; RL-LL; blocking signal, 60 ms pulse, max. 60 pulses/s|
|Brake||Dynamic DC brake, 70 ms|
|Construction||100 mm ½ 19-inch unit, open frame. 2 units combinable as a full 19-inch module|
|Connectors||For logic control, DIN 41612 F48|
|For power output, 10-pole Harting HS12|
|*All product and service marks contained herein are the trademarks or service marks of their respective owners.|