Betatronics®
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Providing you with
* 1-Wire® Temperature & Voltage sensors *
Solving your RS232 Communication Problems with
* Electrical Isolation, and Fast Data Transfer over Long Cables *
Time measurement
* To 1/100 second (10 milliseconds) with multiple binary inputs *
Energy Subjects
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BETATRONICS CAN HELP YOU
Temperature Sensors for use in Dallas 1-wire® bus systems.
Resolution 1/16 deg C (about 0.11 deg F). Many sensors on one bus.
See pages 1-Wire® Components, and
1-Wire® Photos
Solve RS-232 data transmission error problems, low data transfer rates,
cable length problems, machine stuttering in drip feed, and equipment damage
from
ground current noise, electrical faults, and lightning
by use of
The Betatronics® I232 Isolator System for RS232 to RS232 Communication
See pages I232, and I232 Photos,
and NOISE and GROUNDING
TIMELOG-16 for measuring time to 1/100 second from 1 to 16 inputs over a long time period.
See page TIMELOG-16
Go to www.beta-aa.com for information on our
Electronic Gaging, Axle Assembly, and Miscellaneous Items.
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Web Site Summary
Devices Based on 1-Wire® Components page
1-Wire is the registered trademark of Dallas Semiconductor now a part of MAXIM.
Betatronics is combining these components into products. Such as temperature
sensor probes. The 1-Wire system provides a means to use multiple sensors on a
simple bus with communication to a master.
Sixteen or so temperature sensors can make simultaneous measurements at a
rate of once every 2 seconds for the group of N sensors. Total time to make this
group measurement is about 0.75 seconds plus the measurement data transfer time.
The maximum number of sensors per bus is a function of cable length, baud rate,
and other factors.
Various packages are provided.
I232 INFORMATION page
A discussion on the Betatronics RS232 to RS232 Isolator System. This system provides electrical
isolation of the two ends of an RS232 connection to approximately 2000 volts short time peak,
long cable length up to 4000 ft at 115.2 kbaud and 8000 ft at 19.2 kbaud and lower. Lowest cost
form requires software handshake.
Use with any CNC RS232 communication path or other RS232 type application. Use with any software,
there is no data modification. This is great for drip feed (DNC) on finish cuts on contour
applications because you can operate at the maximum CNC Machine baud rate up to 115.2 kbaud.
I232 PHOTO page
An I232 Photo.
NOISE and GROUNDING INFORMATION page
Discussion on Ground Resistance and Ground Noise Problems. Why "Direct RS232 Connection"
is risky.
CAT-5E WAVEFORM PHOTOS page
Measurements on CAT-5E cable as applied to RS232 applications.
TIMELOG-16 INFORMATION page
A discussion on the Betatronics TIMELOG-16 time measurement system. Sixteen binary inputs quantized to
1/100 second over any arbitrary time period.
MISCELLANEOUS PHOTOS page
Various photos relating to CNC.
USEFUL INFORMATION page
Some external WEB sites with useful information for CNC.
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A schematic diagram of an RS232 Communication System with Betatronics I232 Isolation.
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An RS232 port directly connected to another RS232 port has several problems
that are essentially eliminated by using our I232 product. These are:
Direct RS232 problem 1 -- Cable length is limited to very short distances at high baud rates.
Useable cable length, and file transfer time are both inversely
proportional to baud rate. Thus, as baud rate increases cable length
must shorten, but you get faster file transfer with hi baud rates. If cable length
limits your baud rate to less than your CNC's maximum baud rate capability,
then in DNC (drip mode) you may have suttering of your CNC from
data starvation caused by the RS232 channel. However, if the CNC is the baud rate
limiter, then the CNC is the problem and not the RS232 cable path.
Direct RS232 problem 2 -- High sensitivity to ground loop noise.
Causes data transmission errors. In some cases total failure of communication.
Noise voltages in the range of 3 volts may cause errors.
Direct RS232 problem 3 -- Potential equipment damage from electrical short circuits and lightning,
Above 25 to 30 volts difference in ground potential, sometimes less, is sufficient to destroy RS232 components. Isolation greatly reduces this problem, see NOISE and GROUNDING.
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Betatronics®
PO Box 1288, Ann Arbor, MIchigan 48106-1288
voice 734-930-6136
This web site is http://www.beta-a2.com
Our e-mail address is info@beta-a2.com
Copyright© 2003-2013 Gordon A. Roberts
All rights reserved. 130417-1616
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