The Electronics; Nano Pump Main Board (Npm) - Agilent Technologies 1100 Series Service Manual

The Electronics

The electronics are comprised of four main components:
• The nano pump main board (NPM), see
• The power supply, see
Optional:
• The interface board (BCD/external contacts), see
• The interface board (LAN), see

Nano pump main board (NPM)

The board controls all information and activities of all assemblies within the
nano pump. The operator enters parameters, changes modes and controls the
nano pump through interfaces (CAN, GPIB or RS-232C), connected to the
user-interfaces. Figure 41 and Figure 42 show block diagrams of this board.
ASIC — Application-Specific Integrated Circuit
The application-specific integrated circuit (ASIC) includes all digital logic for
the core processor functions and also for module-specific functions.
Motor Drive
There are two identical motor drives for the drive assemblies. Each drive
comprises motor control, motor amplifier (drive) and current control.
Active Inlet Valve Drive
There are two identical valve drives for the two active inlet valves. Each drive
comprises two amplifiers for the two contacts of valve solenoid.
Solvent Selection Valve Drive
This drive consists of amplifiers for the solenoids of the solvent selection
valve.
1100 Series Nano Pump Service Manual
page
page 228.
page 217.
Introduction to the Nano Pump
207.
page 215.
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