500-003124-000
1-1
SECTION 1
INTRODUCTION
1.1
FEATURES
The VMIVME-3124 Analog Input board provides automatic scanning of
16 differential or 32 single-ended analog input channels. The channels are digitized
with a 12-bit resolution Analog-to-Digital Converter (ADC). Each input is over-voltage
protected and low-pass filtered. The board is very easy to use, no software setup is
required. After power-up or system reset, the VMIVME-3124 automatically starts
scanning each of its 16 or 32 input channels. Conversion data is stored automatically
in a dual-port memory, making it immediately accessible from the VMEbus. The
VMIVME-3124 provides on-board voltage references to perform an on-line or off-line
built in self-test. The input voltage range and gain are user programmable with
jumpers. The VMEbus base address and the access mode are fully selectable. In
short I/O space the board can be ordered to support optional current inputs (0-25 mA)
using 32-channel single-ended inputs.
Some of the distinguishing features of the VMIVME-3124 include:
a. VMEbus 3U single height format
b. Sixteen differential or 32 single-ended analog input channels
c. One 12-bit A/D converter with built-in track-and-hold
d. Automatic scanning of all inputs at 40 kHz aggregate rate
e. No software initialization required to begin scanning
f. Input ranges from
50 mV to
10 VDC
g. Input over voltage protection
h. Analog inputs are low pass filtered at 50 kHz
i. Optional add on 40 Hz low pass filter card
j. Discrete wire or mass terminated cables
k. Input pull-down resistors prevent floating inputs
l. Supports on-line & off-line Built-In-Test (BIT)
m. Jumper programmable gains of x1, x10, x100
n. Selectable A/D ranges of
5 VDC,
10 VDC and 0-10 VDC
o. Data Accesses: D16, D08(EO), D08(O)
p. Front panel LED
q. Optional 0-20, 4-20, and 5-25 mA current input range
