This appliance conforms to the relevant Low-Voltage and EMC Guidelines.
2. Application
The SMS 150/151 electronic controller is used for stepless control of in-
ductive loads such as spiral conveyors, linear conveyors and hoppers.
The controller works on the phase control system, the conveyor output is
carried out by setting the magnet voltage via the setpoint potentiometer
integrated in the casing cover. The control curve of the setpoint value
voltage can be restricted by means of two trimming potentiometers, Umin and
Umax, on the board in such a way that the complete range of the setpoint
value can always be used.
The ignition impulses can be displaced infinitely in the range of the posi-
tive or negative mains voltage half-wave through the setpoint voltage ad-
justable with the setpoint, which then sets the voltage-time area of the
output voltage is set. With feeder appliances with 50 Hz oscillation fre-
quency both (positive and negative) mains voltage half-waves are con-
trolled, and with feeders with 25 Hz oscillation frequency only one mains
voltage half-wave is controlled. The switchover between full-wave and half-
wave mode is carried out as a standard with a sliding switch on the board
(see Connection Possibilities).
After the working voltage has been switched on the integrated variable
soft-start is started and guarantees smooth acceleration of the output vol-
tage to the preset voltage value. This eliminates possible switching peaks.
In addition, the soft-start, and the soft-stop, become effective when the
output voltage is switched on and off via the controller input for the lev-
el control system and serves to increase or decrease the conveyor output on
a time-controlled basis so that bulk material does not change its position.
Both these times can be set separately.
The controller input controls the running time of the oscillation conveyor
in such a way that unnecessary running time are avoided. Internal variable
times (GAN and GAB) are used to turn the oscillation conveyor ON or OFF in
dependency on the material level measured via a material sensor.
The controller input enables the turn On and OFF of the controller load
output through another system (SPS, initiator, sensor and other). The con-
troller has an integrated power supply for +24VDC. A turn ON and OFF
through a external +24VDC voltage is possible. The controller input takes
affect to the ignition pulses.
Measurements of the output voltage (arithmetic value measurements) enable
changes to the voltage to be registered immediately an compensated by means
of a controller stage. This guarantees even running of the bulk material.