GE VMIVME-3122 Analog-to-Digital Converter

GE VMIVME-3122 Analog-to-Digital Converter

DESCRIPTION

This product is designed to  support 64 channels of differential or single-ended wide  range (±250 mV to ±10 V) analog inputs.The board supports the following operating modes which  are described below:

Trigger Modes 

Software Trigger 

External Trigger 

Interval Timer Trigger 

Scan Modes 

Autoscan 

Single Scan 

Random Access

SPECIFICATION

• 64 differential or single-ended inputs 

• 16-bit A/D conversion 

• Software-selectable conversion rate (100 kHz maximum) 

• Program-selectable scanning of 1, 8, 16, 32, or 64 channels 

• Continually digitizes selected input channels and stores the results

• Programmed VMEbus interrupts 

• User-programmable interval timer  

• Software-programmable gain 1 and 10 

• External trigger to synchronize multiple boards simultaneously 

• Jumper-selectable A/D ranges of 0 to +5 V, 0 to +10 V, ±2.5 V,  ±5 V, and ±10 V • Optional low pass filter 

• Overvoltage protected inputs 

• 1,024-word data buffer (16-word deep buffer x 64 channels) 

• Selectable output coding 

• Powers up in autoscanning mode with unity gain

APPLICATIONS

• Factory automation and instrumentation 

• Process control 

• Laboratory instrumentation 

• Machine monitoring 

• Data acquisition

VMEbus Compliance:

This product complies with  VMEbus Specification ANSI/IEEE STD 1014-1987  IEC 821 and 297 with the following mnemonics:

A32/A24/A16:D16/D8 (EO) DTB Slave 

Interrupter I(1 to 7) ROAK (DYN) 

Interrupter Vector: D08 (O) (DYN) 

6U form factor

VMEbus Interrupt:

An interrupt request can be  generated at the end or middle of a buffer scan. The  request can also be initiated after a specific number of  samples (1 to 65,535) have been acquired. Response  vectors are controlled through Interrupt Vector  Registers.

Data Ready Flag:A data ready flag in the CSR is set  when the data buffer is filled (endscan) or half-filled  (midscan).

UIOC® SUPPORT

In a UIOC, the VMIVME-3122 is  used as a monitoring device. During initialization, the UIOC  programs the VMIVME-3122 to scan all 64 channels and sets  the scan mode to Autoscan. Through UCLIO™ language, the  user may set programmable channel gains and command the  UIOC to acquire data from any or all of the VMIVME-3122  channels. Through a menu-driven calibration process, the  user may create and store channel gain and offset correction  factors which are automatically used by the UIOC to provide  software gain and offset corrections for each channel.

VMIVME-3417A

16-Channel Isolated Signal  Conditioning Board with Optional Current Loop  Termination. The VMIVME-3417A provides full-scale  input ranges from ±5 mV to ±10 V. Two-pole low pass  input filters are available with cutoff frequencies of 4, 40,  or 400 Hz. Optional current loop termination input  resistors are available, and replace the input filter. See  Figure 2 for a typical system implementation of the  VMIVME-3417A.

VMIVME-3418

8-Channel Strain Gauge and RTD  Isolated Signal Conditioning Board. The  VMIVME-3418 provides full-scale input ranges from  ±5 mV to ±10 V. Low pass input filters are available with  cutoff frequencies of 4, 40, or 400 Hz. See Figure 3 for a  typical system implementation of the VMIVME-3418.