User Manual AMETEK Programmable Power
RS Series 131
5.3 Controller Assembly
The Controller Assembly is located in the top section of the RS unit. To access this assembly,
the top cover needs to be removed. The controller assembly consists of three printed circuit
boards connected by a ribbon cable. The controller contains the main oscillator, which
generates the sine wave signal setting the frequency, amplitude and current limit level. It also
senses the output voltage to provide closed loop control of the output. The controller also
handles all user interface and remote control related tasks.
The controller uses a two board set assembly (7003-718-2 or 7003-718-4). The function of each
of the boards that make up the controller module is described in the following paragraphs.
5.3.1 CPU Controller
This board assembly, A2-A7, consists of the components for the CPU (DSP), generating the
Phase waveform signal to the power amplifier and all of the program, waveform and data
memory. In addition, the waveform board contains the circuits for all measurements. The clock
and lock circuit required to support the clock and lock mode of operation of multiple RS units is
also on this board assembly.
All three phases are contained on the same board. If the -413 option is present, a separate inter
harmonic generator board is connected to the CPU board.
5.3.2 Keyboard / Display Board
The keyboard/display assembly is assembly A2-A9. It is mounted to the front panel and holds
the 23 rubber keys. It also has the LCD graphics display. A shaft encoder is mounted on the
board that is used as a shuttle input to allow slewing of setup parameters. If the RS system is
used over one of the remote control interfaces, the keyboard functions can be locked out by
asserting the REMOTE state. See the RS Series Programming Manual (P/N 9003-961) for
details.
5.3.3 GPIB / RS232 or GPIB / RS232 / USB / LAN IO Board
This board assembly is identified as A1. It has the IEEE 488, RS232 and USB transceivers and
optionally an Ethernet interface (-LAN option). USB and LAN are available on top assembly
7003-427 RS models only. It also has isolators to provide safety isolation for both interfaces and
additional user accessible I/O lines. Additional user accessible inputs and outputs available
through this assembly are:
• Trigger Input BNC
• Trigger Output BNC
• Function Strobe BNC
• Remote Inhibit (terminal strip)
• External Sync (terminal strip)
• Clock BNC (option)
• Lock BNC (option)
• Output Status (Available on top assembly 7003-427 only.)
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