GE Fanuc VME-3122A High Performance 16-bit Analogue to Digital Converter (ADC) Board

Features

- 64 different or single-ended inputs

- 16-bit analogue-to-digital conversion (A/D)

- Software selectable conversion rate (up to 100 kHz)

- Programmable selection of scanning 1. 8. 16. 32 or 64 channels

- Continuous digitisation of selected input channels and storage of results

- Three trigger modes

- Software triggered

- External trigger

- Interval timer trigger

Three scanning modes

-Automatic scanning

-Single scan

-Random access

- Programmed VME interrupts

- User programmable interval timer

- Software programmable gains of 1 and 10

- External trigger synchronises multiple boards simultaneously

- Jumper-selectable A/D ranges of 0 to +5V, 0 to +10V, ±2.5V, ±5V, and ±10V

- Optional low-pass filter

- Overvoltage protection input

- 1.024 word data buffer (16 word depth buffer x 64 channels)

- Optional output coding

- Power up in auto-scan mode with a gain of 1

APPLICATIONS

- Factory automation

- Process control

- Laboratory Instrumentation

- Machine monitoring

- Data Acquisition

Functional Characteristics

At +25°C and rated power supply conditions (unless otherwise noted)

Trigger Modes

Trigger Mode: Software Trigger: Initiate the selected scan mode by writing the software trigger address.

External Trigger: Receives an external trigger via the P2 connector to initiate the selected scan mode.

Interval Timer Trigger: activates the selected scan mode each time the programmed interval expires.

Scan Mode: Auto Scan: This is the default scan mode. All active channels are scanned sequentially and continuously.

Single Scan: A single data burst (scanning all selected channels) is initiated by the selected trigger mode.

After scanning all selected channels, the scanning process stops and waits for another trigger.

Random Access: Selects, digitises and stores one channel each time the selected trigger mode is enabled.

Channel Auto Gain: A unique gain code for each channel is loaded from the VME into the gain buffer.

The assigned code is retrieved from the buffer in real time each time a channel is acquired.

Synchronisation: Single sweeps or bursts can be triggered by an external TTL flip-flop (external trigger) via the P2 connector or by a control and status register.

or initiated by a local trigger (software trigger) via the Control and Status Register (CSR).

In either case, a P2 flip-flop output is generated which can be used to synchronise up to 15 boards.

VME Access: The response to the address modifier is selectable via jumpers:

A32. A24 or A16 address space

Supervisory access or user access, or both

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