AMETEK Compact i/iX Series - Manual (Page 94)

User Manual Compact i/iX Series
AMETEK Programmable Power California Instruments 94
5.5 Auxiliary bias DC Supply
An auxiliary bias DC Supply (P/N 250808) is located in the rear of the chassis below the
Range/Relay/Interface assembly. Low-level DC voltage is distributed to the PFC assembly.
5.6 Range/Relay/Interface Assembly
The Range/Relay/Interface Assembly (P/N 6005-720-1 for Series II) is located in the back of the
chassis and contains the required range and output relays as well as all analog and digital interfaces to
the outside.
An isolated SELV DC supply is used to provide power to the analog and digital interface circuits (USB,
GPIB, LAN, AUX I/O).
5.7 Front Panel Assembly
The Front Panel Assembly (P/N 6005-403-1) is located on the front panel. The controller assembly
consists of the front panel with on/off switch, a CPU board and a keyboard/display board. 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 function of
each of the two boards that make up the controller assembly is described in the following paragraphs.
5.7.1 Programmable Controller
This board assembly (P/N 6005-703-2 for Series II) consists of the components for the CPU (DSP),
generating the waveform signal to the power amplifier and all program, waveform and data memory.
In addition, this board contains the circuits for all measurements. The clock and lock circuit required to
support the clock and lock mode option is also located on this board assembly if this option is installed.
5.7.2 Keyboard / Display Board
The keyboard/display assembly (P/N 6005-702-2) is mounted between the CPU board and the front
panel. If the power source is used over one of the remote control interfaces, the keyboard functions
can be locked out by asserting the REMOTE state. See the i/iX Series Programming Manual (P/N
6005-961) for details.