User Manual
AMETEK Programmable Power
BPS Series
110
6.3
Controller Assembly
The Controller Assembly is located in the top section of the BPS 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. The function of each of the boards that make up the
controller module is described in the following paragraphs.
6.3.1
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 BPS units is also on this board assembly.
6.3.2
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 BPS system is used over one of the remote
control interfaces, the keyboard functions can be locked out by asserting the REMOTE state. See the BPS
Series Programming Manual (P/N 9003-961) for details.
6.3.3
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 specific top assembly BPS 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)
Output Status (specific top assembly models only
)
