rtd DM6210, Руководство пользователя

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The DM6210 dataModule
®
medium speed analog input module turn your IBM PC-compatible
cpuModule™ or other PC/104 computer into a high-performance data acquisition and control system. Ultra-
compact for embedded and portable applications, the DM6210 features:
• 16 single-ended analog input channels,
• 12-bit, 20 microsecond A/D converter,
• ±5, ±10, or 0 to +10 volt analog input range,
• Resistor configurable gain,
• 16 TTL/CMOS programmable digital I/O lines,
• Three independent 16-bit, 8-MHz timer/counters,
• +5 volt only operation,
• BASIC and C source code; diagnostics program.
Analog-to-Digital Conversion
The analog-to-digital (A/D) circuitry receives up to 16 single-ended analog inputs and converts these
inputs into 12-bit digital data words which can then be read and/or transferred to PC memory.
The analog input voltage range is jumper-selectable for bipolar ranges of -5 to +5 volts or -10 to +10
volts, or a unipolar range of 0 to +10 volts. The module is factory set for -5 to +5 volts. Overvoltage protec-
tion to ±35 volts is provided at the inputs. A/D conversions are performed by a 12-bit successive approxima-
tion converter. This high-performance converter and the high-speed sample-and-hold amplifier preceding it
make sure that dynamic input voltages are accurately digitized. The resolution of a 12-bit conversion is
2.4414 millivolts on the -5 to +5 volt range and the maximum throughput is 40,000 samples per second.
The converted data is read and/or transferred to PC memory, one byte at a time, through the PC data bus.
8254 Timer/Counter
An 8254 programmable interval timer contains three 16-bit, 8-MHz timer/counters to support a wide
range of timing and counting functions. The clock, gate and output pins for each of the three timer/counters
are available at the I/O connector.
Digital I/O
The DM6210 has 16 TTL/CMOS-compatible digital I/O lines which can be directly interfaced with
external devices or signals to sense switch closures, trigger digital events, or activate solid-state relays. The
lines can be programmed as inputs or outputs in groups of 4 bits. There is also a special latched input mode
which allows the digital inputs to be latched on an external clock edge for time critical applications. Pads for
installing and activating pull-up or pull-down resistors are included on the module. Installation procedures
are given at the end of Chapter 1, Module Settings .
What Comes With Your Module
You receive the following items in your DM6210 package:
• DM6210 interface module with stackthrough bus header
• Mounting hardware
• Software and diagnostics diskette with example programs in BASIC and C; source code
• User’s manual
If any item is missing or damaged, please call Real Time Devices’ Customer Service Department at
(814) 234-8087. If you require service outside the U.S., contact your local distributor.