DM5210 analog input module i-3 RTD Embedded Technologies, Inc.
The DM210 and DM5210 dataModule
®
medium speed analog input modules 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 210/5210 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,
• 20 TTL/CMOS 8255 based programmable digital I/O (16 at I/O connector, 4 at on-board pads),
• Three independent 16-bit, 8-MHz timer/counters,
• +5 volt only operation (DM5210),
• BASIC and Turbo C source code; diagnostics program.
Note that the difference between the DM210 and DM5210 is the power supply requirements: the DM210
requires ±12 and +5 volt power sources and the DM5210 requires a +5 volt source. The following paragraphs briefly
describe the major functions of the module. A detailed discussion of module functions is included in subsequent
chapters.
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 protection to ±35 volts is
provided at the inputs. A/D conversions are performed by a 12-bit successive approximation 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 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 210/5210 has 20 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 are provided
by the on-board 8255 programmable peripheral interface (PPI) chip. Sixteen of the lines are brought out to the I/O
connector and four are available at a set of on-board pads located near the edge of the module for easy access. Pads
for installing and activating pull-up or pull-down resistors are included on the module for the 16 lines brought out to
the I/O connector. Installation procedures are given at the end of Chapter 1, Module Settings.
What Comes With Your Module
You receive the following items in your 210/5210 package:
• DM210 or DM5210 interface module with stackthrough bus header
• Mounting hardware
• Software and diagnostics diskette with example programs in BASIC and Turbo C; source code
• User’s manual
If any item is missing or damaged, please call RTD Embedded Technologies, Inc. Customer Service Department
at (814) 234-8087. If you require service outside the U.S., contact your local distributor.
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