Yaskawa SmartTrac DM6420 Multi I/O Card - Manual (Page 10)

Smart Trac DM6420 Multi I/O Card
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Smart Trac DM6420 Multi I/O Basics Technical Manual
The card supports up to sixteen software-selectable analog input channels. You
may program the input voltage range for -5 to +5 volts, -10 to +10 volts, or 0 to
+10 volts.
Your Smart Trac DM6420 Multi I/O may be programmed with binary gains of
1, 2, 4, and 8, to amplify lower level signals to more closely match the module’s
input ranges (see Table 1). Overvoltage protection to ±12 volts is provided at the
inputs.
Table 1. Input signal amplification for selected input ranges.
Selected
Input
Range
Maximum Magnitude of Input Signal
Gain=1 Gain=2 Gain=3 Gain=4
±5V ±5V ±2.5V ±1.25V ±0.625V
±10V ±10V ±5.0V ±2.50V ±1.25V
0-10V 0-10V 0-5V 0-2.5V 0-1.25V
The 12-bit successive approximation A/D converter accurately digitizes
dynamic input voltages in 2 micro-seconds, for a maximum throughput rate of
500 kHz. The converter IC contains a sample-and-hold amplifier, a 12-bit A/D
converter, a 2.4-volt reference, a clock, and a digital interface to provide a
complete A/D conversion function on a single chip. Conversions are controlled
by Smart Trac software commands.
Two independent 12-bit analog output channels are included on the Smart Trac
DM6420 Multi I/O Card. The analog outputs are generated by two 12-bit D/A
converters with independent jumper-selectable output ranges of ±5, 0 to +5, or 0
to +10 volts. The 10-volt ranges have a resolution of 2.44 millivolts, and the 5-
volt range has a resolution of 1.22 millivolts.
Data may be transferred between your Smart Trac DM6420 Multi I/O card and
external devices using sixteen (16) digital I/O points. Eight of these points are
bit programmable and eight are byte, or port, programmable.
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Port 0 provides eight bit programmable points which can be
independently set for input or output.
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Port 1 can be programmed as an 8-bit input or output port.
Analog Inputs
A/D Converter
D/A Converters
Digital I/O