Advertisement
ADC-4
ANALOG TO DIGITAL
CONVERTER
TECHNICAL REFERENCE
Click for more info:
www.eeci.com/adc-4p.htm
PHONE...................
(937) 349-6000
ORDERS................
(800) 842-7714
TECH SUPPORT...
(937) 349-6000
E-mail.....................
sales@eeci.com
www.eeci.com
TABLE OF CONTENTS
Specifications, Technical Support and Warranty.... page 1
Connection Diagram.............................................. page 2
Power Supply Requirements.................................. pages 2, 3 & 8
Set-Up and Testing................................................ page 3
Connector Pin-Outs............................................... pages 4 & 5
Analog Input Connections & Trouble Shooting...... page 5
Expansion Ports.................................................... page 6
Adding Analog and Status Inputs........................... page 7
Baud Rate/Protocol Selection................................ page 7
Voltage Input Amplification & Signal Conditioning.. page 8
RS-422 and RS-485 Interfacing............................ page 9
Calibration and Trimpot Adjustment...................... pages 9 & 10
Commercial Use of the ADC-4.............................. page 10
12 Bit Analog Inputs............................................... page 10
8 Bit Analog Inputs................................................. page 11
10 Bit Analog Inputs & Analog Input Interfacing..... pages 12 & 13
Control Software.................................................... pages 13, 14 & 15
Rack Mounting and Repair Service........................ page 16
SPECIFICATIONS
Power Supply....................... 9 to 14 volts DC (300MA)
Protocol for Serial Data I/O.. 50 to 19,200 baud (defaults to 8 data bits, no parity & 1 or 2 stop bits)
(sampling at a maximum of 850 samples per second single channel)
Resolution..........................
4 channels at 12 bit (providing 4,096 increments per channel)
8 channels at 8 or 10 bit with optional port #2 (256 or 1,024 increments)
Input Channels...................
4 analog channels (12 analog channels with optional port #2)
Expansion Capability..........
up to (112) relays (using EX-16 Relay Expansion cards)
up to (128) status inputs (using ST-32 Status Expansion cards) or...
up to (24) additional 8 or 10 bit analog inputs (using AD-16 Analog Expansion)
up to (24) temperature inputs (using the /E and /F Temperature Input options)
Software Compatibility.........
All Windows operating systems, DOS and most other operating systems.
Hardware Compatibility.......
Typically this will be all computers that support serial communications, from
the slowest 8086 to the fastest Quad core and newer.
Weight................................
6 ounces
Size....................................
7 inches by 5 inches
TECHNICAL SUPPORT
Technical support for our products is available by calling (937) 349-6000. If a technical adviser is not available, please
leave your name, phone number and a time that you can be reached. Your call will be returned as soon as possible
and within 8 hours.
WARRANTY AND CARE OF THE ADC-4
The ADC-4 Analog to Digital Converter is warranted against factory defects for a period of 90 days from the date of
purchase. The ADC-4 has proven to be extremely reliable in actual operation during field tests. We recommend that
Page 1
Advertisement
Table of Contents
Related Manuals for EECI ADC-4
Summary of Contents for EECI ADC-4
-
Page 1: Table Of Contents
WARRANTY AND CARE OF THE ADC-4 The ADC-4 Analog to Digital Converter is warranted against factory defects for a period of 90 days from the date of purchase. The ADC-4 has proven to be extremely reliable in actual operation during field tests. We recommend that... -
Page 2: Connection Diagram
/T option when ordering. (1) Connect the serial cable to COM1 of your computer and connect the other end to the ADC-4 as shown page 2. If you did not order a serial cable with your ADC-4, you may construct your own as shown on page 4. Connect the... -
Page 3: Connector Pin-Outs
(-) on the ADC-4) NOTE: This connection is not needed on (1) Verify power to the ADC-4 by checking for a minimum of 9 volts DC at the terminal block and for 5 volts DC on the most computers. -
Page 4: Expansion Ports
1800 CONNECTION OF THE ADC-4 DIRECTLY TO A MODEM The ADC-4 may be connected directly to a modem at a remote location without the need for a PC at the remote site. 2000 The modem at the remote site is then considered DCE equipment (Data Communications Equipment) and requires that the serial transmitter and receiver lines be reversed (pins 2 &... - Page 5 CALIBRATION AND TRIMPOT ADJUSTMENT the VA-1 may be used to convert a differential signal into a 0 to 5 volt signal for connection to the ADC-4. The VA-1 has a reference input (for connection to the ADC-4 reference) which is used to generate a 2.5 volt offset. The gain The calibrate terminal (pin #7 on the DB-9) is not normally used.
- Page 6 (2) Install the ADC-4 (and any expansion cards) in a metal enclosure and ground the enclosure to a reliable earth = DF. A 60 volt input to the divider divided by 20 multiplied by 51 = 153 = TV, the value transmitted by the ADC-4.
- Page 7 (the first 6 bits will always be zero and are not used). The following method is used to divide a high voltage down to the 5 volt range needed for input into the ADC-4. This method involves the use of two resistors (R1 and R2) which together add up to Rt (total resistance). The total...
- Page 8 12 bit port of the ADC-4 is shown below. List the source code example for a better understanding of the sequence. PROGRAMMING EXAMPLES Analog information on the four 12 bit analog channels is acquired by transmitting and receiving (8) single byte codes...
-
Page 9: Baud Rate/Protocol Selection
RACK MOUNTING The ADC-4 may be rack mounted with any of the 5" by 7" cards in the CH series card holder racks. The CH-2 will hold up to (2) of the 5" by 7" cards, the CH-4 will hold up to (4) of the 5" by 7" cards and the CH-8 will hold up to (8) of the 5"...
Need help?
Do you have a question about the ADC-4 and is the answer not in the manual?
Questions and answers