54 100-412-234 REV. 06
Ultrasonic Power Supply
The ultrasonic power supply module generates ultrasonic energy at the resonant
frequency of your converter-booster-horn stack. The ultrasonic power supply module is
configured as either analog or digital, and each contains five main circuits. The analog
power supply has one preset which calls up the factory default setting. The digital power
supply has a library of locked presets which are accessible for various process parameter
modifications that are unique to the power supply itself. These modifications can be
named to reflect specific applications, and are loaded into memory prior to shipment from
the Branson factory. The parameters of the individual presets can be modified by a
Branson representative. Initially all presets are set to factory default. They are accessed
via an RS232 link to the system controller.
• 320VDC Power Supply: converts AC line voltage to +320VDC for the output power devices
• Output Circuit: Matches the impedance of the output power device to the Converter-Booster-
Horn Stack; and provides feedback to the Control circuit
• Control Circuits: perform the following functions:
Provide drive signal to output power device
Determine true percentage of ultrasonic power used over a range of amplitudes
Allow control of the resonant frequency
Control starting amplitude
Provide overload protection for the Ultrasonic Power Module
Store operating frequency of last weld (frequency memory) and use the stored frequency as a
starting point for the next weld
Check and update frequency memory on start-up
Provide switch-selective starting ramp times (Start)
DC Power Module
The Switching DC Power Module rectifies, filters, and regulates the AC voltages from the
Line Transformer into DC voltages for the System Control Module. These two circuits are
described below:
• 5VDC Output: Provides +5VDC for the analog and digital circuitry on the System Control Module
• 24VDC Output: Provides +24VDC for the System Control Module control signal and user I/O
voltage
User I/O
The User I/O provides a standard user interface and is accessed on the rear of the power
supply at J3. It gives the customer the ability to make their own interface for special
control and/or special reporting needs. Electrical interface outputs may be configured for
open collector mode or for signal mode (signal voltage levels as indicated) by setting the
User I/O DIP switch located next to J3.
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