User Manual
2253i / 2253iX
AMETEK
California Instruments
93
5.6 Range/Relay Assembly
The Range/Relay Assembly (P/N 6005-712-1) is located in the back of the chassis and contains the
required range and output relays. Remote voltage sense and output current monitor circuits are also
on this assembly.
5.7 Interface Assembly
The Interface Assembly (P/N 6005-714-1) is located in the back of the chassis and contains several
remote control interfaces. An isolated SELV DC supply is used to provide power to the analog and
digital interface circuits (USB, RS232, GPIB, LAN, AUX I/O).
5.8 Front Panel Assembly
The Front Panel Assembly (P/N 6005-408-1) 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.
5.8.1 Programmable Controller
This board assembly (P/N 6005-713-1) 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.
5.8.2 Keyboard / Display Board
The keyboard/display assembly (P/N 6005-703-2) 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 Compact Series Programming Manual
(P/N 6005-961) for details.