General Information; Signal Conditioning; Di Procomm Controller; System Interfaces - PEP CP381 Manual

CP381
2. Functional Description
The following sections present more detailed, board level information about the CP381 digital
input controller whereby the board components and their basic functionality are discussed in
general.
2.1

General Information

The CP381 is comprised basically of the following:

• Signal conditioning

• DI ProComm controller

• Controls digital data acquisition and provides interfacing to the CompactPCI bus
• System interfaces for:
• Digital inputs
• 30 channels
• One 62-pin, female, 3-pin row, D-sub connector (CON2)
• CompactPCI bus
• 132-pin, female, 6-pin row connector (CON1)
• CompactPCI specification
• Testing and program development (JTAG/ISP) connector (CON3)
• On board memory: Capability EEPROM (CapROM)

• Monitor and Control

• Two green LED's
• Registers
• Software
2.1.1 Signal Conditioning
The digital input signal conditioning consists of the following:
• Overvoltage protection
• Low-pass signal filtering
• Current limitation
• Inverse polarity protection
• Input signal high-low determination
• Output signal stabilization buffering
• Optoisolation: galvanic isolation of process side from system side
2.1.2 DI ProComm Controller
The DI ProComm controller is responsible for supervising and controlling the digital data acqui-
sition process and maintaining communication with the CompactPCI system master. Applica-
tions address the CP381 through its software driver interface within the system master whereby
the controller accepts requests from the driver and executes them accordingly. Digital data from
the signal conditioning is processed through the DI ProComm controller and then made avail-
able to the system master.
ID 24107, Rev. 01 © 2002 PEP Modular Computers GmbH
Functional Description
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