Kontron CP371 - Manual (Page 21)

CP371 Introduction
ID 23762, Rev. 02 © 2002 PEP Modular Computers GmbH Page 1 - 5
1.3 Board Overview
1.3.1 Board Introduction
The CP371 is a 16 channel (dual cluster, eight channels each) analog input board. The sources
of the analog inputs presented to the board may either be a voltage or current generator. The
board accepts either single-ended or differential voltages. Currents of up to 20 mA are convert-
ed to a single-ended voltage prior to further processing.
Input signal processing begins with the presentation of the signal to the front panel connector.
Signal conditioning prior to analog to digital conversion includes: conversion of current signals
to single-ended voltage signals; low-pass filtering and over voltage protection; differential to
single-ended voltage conversion, input offsetting, and gain correction. After analog to digital
conversion, the raw digitized analog data is transferred from the ADC to the ADC ProComm
controller where calibrated gain and offset data are made available for further processing. The
ADC ProComm controller is not only responsible for controlling data acquisition, it also controls
the interface to the CompactPCI bus.
Input signal types and ranges are as follows:
• Voltages:
• Single-ended:
• 0 to 1 5 V
• 0 to 10 V
• Differential:
• ± 1 5 V
• ± 10 V
• Currents:
• 0 to 20 mA
• 4 to 20 mA
Output data are:
• Raw digitized analog input data
• Gain correction data
• Offset correction data
1.3.2 Board Specific Information
Specific board components involved in the analog to digital conversion and data handling pro-
cess are:
• One front panel connector (62-pin, female, D-Sub type)
• Sixteen channels of input signal conditioning
• Two, 12-bit ADC’s (one for each cluster of 8 channels each)
• Four optocouplers (serial data and control signals, two for each cluster)
• One FPGA (the ADC ProComm controller)
• One CompactPCI bus connector (J1, board to backplane, 132-pin, female, six row)
• One JTAG/ISP on board programming connector (10-pin, male, dual row)
• Two DC/DC converters (isolation)
• One EEPROM (Capability ROM)