Delta Tau Turbo PMAC PCI-Lite, Справочник по аппаратуре

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Turbo PMAC PCI Lite
Introduction 3
Option 12 provides an 8-channel 12-bit A/D converter. The key components on the board are U20
and connector J30.
Option 12A provides an additional 8-channel 12-bit A/D converter. The key component on the board
is U22.
Option 15: V-to-F Converter for Analog Input
The JPAN control panel port on the Turbo PMAC PCI Lite has an optional analog input called Wiper
(because it is often tied to a potentiometer’s wiper pin). Turbo PMAC PCI Lite can digitize this signal by
passing it through an optional voltage-to-frequency converter, using E-point jumpers to feed this into the
Encoder 4 circuitry (no other use is then permitted), and executing frequency calculations using the time
base feature of the encoder conversion table.
Option 15 provides a voltage-to-frequency converter in component U18 that permits the use of the
Wiper input on the control panel port.
Option 16: Battery-Backed Parameter Memory
The contents of the standard memory are not retained through a power-down or reset unless they have
been saved to flash memory first. Option 16 provides supplemental battery-backed RAM for real-time
parameter storage that is ideal for holding machine state parameters in case of an unexpected power-
down. The battery is located at component BT1.
Option 16A provides a 32k x 24 bank of battery-backed parameter RAM in components U142, U145,
and U149, fitting in the smaller footprint for those locations.
Option 18: Identification Number & Real-Time Clock/Calendar Module
Option 18 provides a module that contains an electronic identification number, and possibly a real-time
clock/calendar.
Option 18A provides an electronic identification number module.