ONTRAK ADR2000 User manual

ADR2000
Version A
Version B
ANALOG/DIGITALRS232/RS485
INTERFACE
USER MANUAL
V 3.0
Caution: The ADR2000 is a static sensitive device. Observe proper procedures
for handling static sensitive devices.
ONTRAK CONTROL SYSTEMS INC.
764 Notre Dame Avenue
Unit # 1
Sudbury Ontario
CANADA P3A 2T2
[phone] ( VOICE )
[phone] ( FAX )
www.ontrak.net ( WEB )

Ontrak Control Systems Inc. reserves the right to change product specifications to improve the
product.
Although every attempt has been made to insure accuracy of information contained in this
manual, Ontrak Control Systems Inc. assumes no liability for inadvertent errors.
Warranty: This ADR2000 is warranted from defects in workmanship and materials for a period of
90 days. Liability for defects is limited to the purchase price of the product. This warranty shall not
apply to defects resulting from improper modifications or use outside published specifications.
Hyperterminal and Windows are trademarks of Microsoft Corporation.
APPLE , MACINTOSH and MAC are trademarks of Apple Computer Inc.
PC, XT, AT, PS/2 are trademarks of International Business Machines Inc.
COPYRIGHT 1999 ONTRAK CONTROL SYSTEMS INC.

TABLE OF CONTENTS
READ ME FIRST 3
1. Communication options.
a) The ADR2000 RS232 Interface. 4
b) The ADR2000 RS485 Interface 5
2. Powering the ADR2000 5
3. ADR2000 Commands 6
a) Analog Input Commands 7
b) Analog Output Commands 8
c) Digital Port Commands 9
d) Event Counter Commands 10
e) ID Command 11
4. Using BASIC with ADR Products 12
5. Using TURBO C with ADR Products 13
6. Daisy Chain Options for the ADR2000 16
7. Interfacing to the ADR2000 ( basic examples )
a) Reading Potentiometer Position 17
b) Connecting Switches to Digital Ports 18
c) Connecting LED'S to Digital Ports 19
d) Driving Solid-State Relays 19
e) Solid-state Temperature Measurement 20
f) Event-Counter Connections 21
APPENDIX
A-CONNECTION DIAGRAM 22
B-ELECTRICAL SPECIFICATIONS 23
C-MOUNTING DIMENSIONS 24
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READ ME FIRST
Thank you for purchasing this ADR2000 serial data acquisition interface. There
are three steps to using the ADR2000.
1.Connecting your computer or terminal to the ADR2000.
2.Providing power to the ADR2000.
3.Sending commands to the ADR2000.
This manual will provide guidance for completing these steps along with BASIC
and TURBO C programming tips. An applications section is also provided to
describe how to interface various electronic transducers and other devices to the
ADR2000. Additional applications and programming examples are available on
our web page at http://www.ontrak.net/
FEATURES
-8, 12-bit analog inputs ( 0 -5 VDC or +/- 5 VDC )
-single ended or differential measurements
- 2 analog outputs ( 0 - 5 VDC 12-bit VER A, 10-Bit PWM VER B )
-16-bit contact or TTL input event counter
-8 digital I/O lines individually programmable as input or output
-high current digital I/O lines ( sink 20mA/source 20mA )
-on-board RS232 to RS485 converter
-daisy-chainable up to 10 boards
-daisy-chainable power supply
-low power requirements ( 5 volts at 40mA )
-power-up via standard wall adapter ( optional )
-simple yet versatile commands
-easy to use with Visual BASIC or TURBO C programs
-compatible with all ADR2000 series interfaces

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1a)THE ADR2000 RS232 INTERFACE
The ADR2000 communicates via a standard RS232 port utilizing a simple three-wire interface.
The only signals used are received data (RC), transmitted data (TX) and ground (GND). Most
RS232 ports use hardware handshaking (i.e. DTR, DSR, CTS, RTS) signals to control the flow of
data on the port. For this reason the cable required to connect to the ADR101 must have jumpers
on the DB25 end to satisfy these handshaking requirements. IBM or compatible computers may
be used as a host computer with the supplied cable. The supplied cable has the following
connections;
Figure 1: Supplied Cable Wiring Diagram
If the host computer has a 9-pin serial port connector, a 9-pin to 25-pin adapter cable will be
required to connect to the ADR2000 cable. This adaptor is available at most computer dealers. If
desired, the DB25 connector on the supplied cable may be removed and a female DB9S
connector can be soldered in its place using the following wiring diagram;
Figure 2 : Modified Wiring Diagram For 9-PIN SERIAL PORTS
If the host computer has a female DB25 connector, a male-to-male adapter is required to use the
supplied cable. This may be purchased at most computer dealers. Apple Macintosh computers
may be connected to the ADR2000 using MAC to DB25 DTE conversion cable.
Once connected to the RS232 based host computer or terminal, the RS232 port should be
configured to the following specifications to allow communication with the ADR2000.
9600 baud - 8 bit words - 1 stop bit - no parity
If using BASIC or C consult the appropriate section in this manual for details on how to configure
your serial port. If a terminal or terminal emulation program is used, configure your terminal to the
above specifications using the operations manual for your terminal equipment or terminal
emulation program.

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1b)THE ADR2000 RS485 INTERFACE
The ADR2000 RS485 interface is a two-wire connection meeting all the standards or the EIA
RS485 interface specifications. The supplied cable is NOT an RS485 cable. To communicate via
RS485 the host computer must have an RS485 port and be connected directly with two wires (
TR+ and TR-). A typical connection diagram is shown in figure 2.
Figure 2 :Typical RS485 Connection
Note that both J1 and J3 are RS485 compatible ports. Connection from the host to the ADR2000
should be made using J1 and then J3 is used to enable daisy chaining additional ADR2000 series
products.
The host RS485 port should be configured with the following specifications to enable
communications to the ADR2000, 9600 Baud - 8 bit words - 1 stop bit - no parity.
Line feeds should NOT be sent after commands as they may collide with data being returned from
the ADR2000.
2.PROVIDING POWER TO THE ADR2000
The ADR2000 may be powered using a regulated 5 volt power supply or a suitable wall adaptor.
Power to daisy chained ADR2000 may also be supplied via the daisy chain cable. See the Daisy
chaining section of this manual for further information.
POWER-UP USING A 5 VOLT REGULATED SUPPLY
If the ADR2000 is to be powered using a regulated 5 volt power supply, the 5VDC and GND
connections are to be made to the ADR2000 via the main terminal block TB1. The supply must be
able to provide a minimum of 60mA and up to 240mA if the ADR2000 is to source current from the
digital outputs. Care must be taken to avoid improper power supply connection as permanent
damage to the ADR2000 may result if connected improperly. No connection to J2 is to be
made if the ADR2000 is powered by a regulated 5 volt supply.
POWER-UP USING A WALL ADAPTOR
The ADR2000 has an on-board 5 volt regulator allowing the use of a 9-volt wall adaptor to power
the internal circuits. The regulator should be able to provide from 300-500mA .(MODE 68-950-1)
The regulator must have a standard 2.1mm, center negative, coaxial connector. The connector can
then be inserted into J2 on the ADR2000. When the ADR2000 is powered by a wall adaptor, the
on-board regulator also may provide a regulated 5 volts DC out to provide power to external
circuits. This 5 volt supply is available on TB1. The amount of current available depends on the
amount of current sourced by the digital ports. For safe operation no more than 100mA should
be drawn from the power terminals to power external circuits.

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ANALOG INPUT COMMAND SUMMARY
RD Returns status of all 8 analog inputs in decimal format ( 0 - 5VDC Ref.
RB Returns status of all 8 analog inputs in decimal format ( +/- 5VDC Ref.
RDn Returns status of analog port specified by n in decimal format.
Input range 0 - 5VDC, single-ended ( n = 0 to 7 )
RBn Returns status of analog port specified by n in decimal format.
Input range +/- 5VDC, single-ended ( n = 0 to 7 )
RAn Returns status of differential port specified by n in decimal format
Input range 0 - 5VDC, differential ( n = 0 to 7 )
RCn Returns status of differential port specified by n in decimal format
Input range +/- 5VDC, differential ( n = 0 to 7)
ANALOG OUTPUT COMMAND SUMMARY
VAdddd Outputs decimal data (dddd) as analog voltage on Terminal V1
( 0000 = 0VDC, 4095 = 5VDC) ( Version A Only )
VBdddd Outputs decimal data (dddd) as analog voltage on Terminal V2
( 0000 = 0VDC, 4095 = 5VDC) ( Version A Only )
FH Sets frequency for PWM outputs to 9.76Khz ( Version B Only )
FM Sets frequency for PWM outputs to 2.44Khz ( Version B Only )
FL Sets frequency for PWM outputs to 610 Hz ( Version B Only )
EA Enables 10-bit PWM output on Terminal V1 ( Version B Only )
EB Enables 10-bit PWM output on Terminal V2 ( Version B Only )
DA Disables 10-bit PWM output on Terminal V1 ( Version B Only )
DB Disables 10-bit PWM output on Terminal V2 ( Version B Only )
TAdddd Sets period of PWM module A ( Version B only )
TBdddd Sets period of PWM module B ( Version B only )
DIGITAL COMMAND SUMMARY
CPAxxxxxxxx Configures PORT A. (x=1 for input, x=0 for output)
SPAxxxxxxxx Output binary data to PORT A. ( x=1 or 0 )
RPA Returns status of all I/O lines in PORT A in binary format.
RPAn Returns status of I/O line specified by n. (n= 0 to 7 )
MAddd Outputs decimal data (ddd) to PORT A. (ddd= 0 to 255 )
PA Returns status of PORT A in decimal format.
RESPAn Resets I/O line specified by n in PORT A. ( n= 0 to 7 )
SETPAn Sets I/O line specified by n in PORT A. ( n= 0 to 7 )
EVENT COUNTER COMMAND SUMMARY
CE Clear Event Counter.
RE Returns present count of counter.
REC Returns present count of counter and clears event counter.
ID COMMAND
*IDN? Returns 4 digit product identifier code.

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3. ADR2000 COMMANDS
a) ANALOG INPUT COMMANDS
There are 8 analog inputs, with a resolution of 12-bits, on the ADR2000 labeled AN0 to AN7. The
analog input range is 0 to 5 VDC or +/- 5VDC. The input range is automatically selected by the
command used to read a specific port. Measurements may also be single-ended or differential
which is selected by the command used to read a specific port. No jumpers need to be set and all
analog inputs may have positive or negative voltages present whether they are read in unipolar or
bipolar mode.
Single-ended input commands;
RD Reads all eight analog inputs in unipolar mode ( 0-5VDC ) and returns 8 values in decimal
format. Data separator is space ( 20HEX ) returning 40 characters total. Order is AN0 to
AN7 ( voltage = ( reading / 4095 ) X 5 )
example; RD<cr>
3456 4095 1287 3212 2865 3577 1000 2321
( AN0=3456 ( 4.219V ), AN1=4095 ( 5.00V ), AN2=1287 ( 1.571V ),etc. )
RDn Returns status of analog port specified by n in decimal format. ( n = 0 to 7 )
(Input voltage range used for conversion 0 to 5VDC)
example; RD0<CR>
2356
( AN0 =2.877V )
RB Reads all eight analog inputs in bipolar mode ( +/-5VDC ) and returns 8 values in decimal
format. Data separator is space ( 20HEX ) returning 40 characters total. Order is AN0 to
AN7 ( voltage = ( ( reading/4095 ) X 10 ) -5 )
example; RB<cr>
3476 0023 1256 3210 1265 4095 0000 3541
( AN0=3476 ( 3.488V ), AN1=0023 ( -4.934V ), AN2=1256 ( -1.932V ),etc. )
RBn Returns status of analog port specified by n in decimal format. ( n = 0 to 7 )
(Input voltage range used for conversion is (-5) to 5 VDC)
example; RB3<CR>
1866
( AN3 = - 0.443V )
Differential input commands;
Note; The analog inputs are grouped into 4 pairs for differential measurements. They are; AN0 and
AN1, AN2 and AN3, AN4 and AN5, AN6 and AN7. In differential commands (n) may be any
number from 0 to 7 and specifies which input is to be considered the positive input for a differential
measurement. Ex RA1 reads the difference between AN0 and AN1 with AN1 being

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the positive input. RA0 reads the same pair but uses AN0 for the positive reference.
RAn Returns status of differential analog port specified by n in decimal format.
( n = 0 to 7 ) (Input voltage range used for conversion 0 to 5VDC)
example; RA0<CR>
1056
To convert to voltage; voltage = ( reading/4095 ) * 5
Ex. Diff between AN0 and AN1 is at (1056/4095) * 5 volts= 1.2894 volts
RCn Returns status of differential analog port specified by n in decimal format. ( n = 0 to 7 )
(Input voltage range used for conversion is (-5) to 5 VDC)
example; RC3<CR>
1866
To convert to voltage; voltage = ((reading/4095)*10) - 5
Ex. Diff between AN3 and AN2 is at ((reading/4095)*10) - 5 = ( - .4432 volts)
b) ANALOG OUTPUT COMMANDS
The ADR2000 has two analog outputs on terminals V1 and V2. The outputs are either 12-bit, 0-
5VDC analog outputs ( Version A ) or 10-bit PWM outputs ( Version B )
Version A ( 12-bit, 0 to 5VDC analog voltage outputs )
VAdddd Sets voltage output on Terminal V1 ( dddd = 0000 to 4095)
example; VA2399<CR>
output voltage on V1 is set to (2399/4095)*5 = 2.929VDC
VBdddd Sets voltage output on Terminal V2 ( dddd = 0000 to 4095)
example; VB3766<CR>
output voltage on V2 is set to (3766/4095)*5 = 4.598VDC
Version B ( 10-bit PWM outputs )
The PWM modules on Version B ADR2000 boards can operate at three fixed output frequencies.
Both modules must operate at the same frequency and this frequency is set by the FH,FM and FL
commands
FH Sets frequency for PWM outputs to 9.76Khz
FM Sets frequency for PWM outputs to 2.44Khz
FL Sets frequency for PWM outputs to 610.Hz.
Note: if frequency is not set, default frequency is 610 Hz.

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EA Turns on PWM output to Terminal V1
EB Turns on PWM output to Terminal V2
DA Disables PWM output on Terminal V1 ( V1 = high impedance )
DB Disables PWM output on Terminal V2 ( V2 = high impedance )
Note1: When PWM pins are disabled they are put into high impedance state.
TAdddd Sets the period of PWM output A on terminal V1 ( dddd=0000 to 1024 )
( 0000 = 0% 1024 = 100% )
example; TA512<CR>
period is set to 512/1024 = 50%
TBdddd Sets the period of PWM output B on terminal V2 ( dddd=0000 to 1024 )
( 0000 = 0% 1024 = 100% )
example; TB232<CR>
period is set to 232/1024 = 22.65%
c) DIGITAL PORT COMMANDS
There is one, eight bit digital port on the ADR2000 labeled PORT A. The individual I/O lines are
labeled PA0-PA7. The following commands allow the user to;
-configure individual bits an input or output
-SET or RESET individual bits
-read individual bits
-read entire port in binary or decimal format
-write to entire port in binary or decimal format.
The digital port commands are;
CPAxxxxxxxx Configures each bit of PORT A . All eight bits must be specified. Order
is MSB-LSB ( x=1 for input, x=0 for output )
example; CPA11110000<CR>
( PA7 ,PA6, PA5, PA4 are configured as inputs and PA3, PA2, PA1, PA0 are
configured as outputs )
SPAxxxxxxxx Outputs binary data to PORT A. All eight bits must be specified.
Order is MSB-LSB. Individual bits configured as input are not
effected by this command. (x=1 or 0 )
example; SPA10101000<CR>
( PA7, PA5, PA3 are set, PA6, PA4, PA2, PA1, PA0 are reset )
RPA Returns status of all I/O lines in PORT A in binary format. Order is MSB-LSB.
Individual lines configured as output will return last data set on the port.
example; RPA<CR>