Performance Vehicle PC Diagnostic Interfaces EvoScan USB DLP-IO8 8 Channel 0-5v Input

EvoScan USB DLP-IO8 8 Channel 0-5v Input

Datalog up to 8 analog 0-5volt sensor inputs in sync with other EvoScan datalogging. Supported by EvoScan v2.9+ Supported by EvoScan GPSNav v2.4+ Price: $57.00

Quantity:

ALL automotive sensors are 0volt to 5volt sensors, such as boost sensors (MAP manifold aboslute pressure), oil pressure sensor, oil temperature sensors, exhaust temperature sensors.    You can save a lot of money by buying this adapter to datalog your sensors.. in fact you can even display them, datalog them via your laptop on either the Windows version of EvoScan or on the Standalone touch screen display called EvoScan GPS Navigator. 

You can even datalog 8 sensors simulateously with this.  and at the same time datalog stock vehicle sensors in the same excel (csv) file format. 

This device also has a 5volt pin for any sensors that need a 5v power source, it also includes a GND pin, and 8 Input Pins - one for each sensor.. 

1 wire goes on the numbered input pin, and the 2nd wire from all/each of the sensor/s goes on the GND pin. Some senors have 3 wires, the 3rd wire is generally the 5volt power for the sensor.  Each wire should be labelled from the sensor manufacturer.. please make sure you connect the correct wires to the correct places.
IMPORTANT:  Connect ALL UNUSED inputs to GND (ground) to avoid wild oscillations on the other inputs you are datalogging sensors from.

Then in EvoScan, or EvoScanGPSnav software you just tick each of the eight DLPIO8-N boxes, and it will start displaying the values on the screen.


Product Title:  USB DLP-IO8 8 Channel 0-5v Input

Datalog your analog 0-5v inputs in sync with other EvoScan v2.9 datalogging.

Datalog your analog 0-5v inputs in sync with other EvoScan Standalone GPS v2.4 Navigator datalogging.





USB-BASED 8-CHANNEL DATA ACQUISITION MODULE

Features:
• 8 Channels: Digital I/O, Analog In, Temperature
• USB Port Powered
• USB 1.1 and 2.0 Compatible Interface
• Easy to Use with Single-Byte Commands


1.0 INTRODUCTION
The DLP-IO8 Data Acquisition Module is a low-cost, easy-to-use data acquisition system for measuring
voltages, controlling and monitoring processes, and acquiring temperature data. Each of the 8 available
channels can be configured for any of the digital, analog, or temperature modes via single-byte commands. All
operational power is taken from the host PC via the USB port.
The mode of each I/O is automatically changed with each command sent. For example, if an I/O is set to Digital
Output – High and then the Digital Input Mode is selected, the I/O is first changed to Input Mode and then the
high/low state is read and returned to the host.
2.0 SPECIFICATIONS
The DLP-IO8 is a 5-volt system that derives its power from the host USB port. Each channel has the following
capabilities:
Digital Output: Set high, or clear to low. (The actual high/low voltage depends upon sink/source current.)
Digital Input: Read the high/low state.
Analog In: Read and return the voltage on each I/O pin using a 10-bit A/D: 0-5 volt range.
Temperature: Measure temperature using a digital temperature sensor (purchased separately) in the range of
67 to 257°F (-55 to 125°C).

3.0 ABSOLUTE MAXIMUM RATINGS
Stresses above those listed here may cause permanent damage to the DLP-IO8:
Operating Temperature: 0-70°C
Voltage on I/Os with Respect to Ground: -0.3V to +5.3V
Sink/Source Current on Any I/O: 25mA

4.0 AVAILABLE DATA READINGS IN EvoScan v2.9 AND EvoScan GPS Navigator v2.4

7.0 TEMPERATURE
Up to eight DS18B20 digital temperature sensors can be connected to the DLP-IO8. For best performance, use
Cat 5 type computer cable to connect the sensors to the DLP-IO8. Two pairs of wires in the Cat 5 cable are
required for the connection. The first pair is for Power (5V) and Ground, and the second pair is designated as
Data and Ground. In addition, a pull-up resistor is required for the data line of approximately 1.5K Ohms.
Figure 1 shows an example of this connection using I/O Channel 1:

DLP Application Tips for Digital on/off  0/1 inputs (this section does not apply to analogue to digital 0-5v inputs)

Digital inputs can be affected by electrical noise if left disconnected. Unused inputs should be connected to ground to avoid unwanted switching that could disrupt other parts of the circuitry.

The DLP-IO8 presents a high impedance when used as a digital input and some noise induced false high inputs were observed early in the prototyping. Pull-up resistors were added to overcome the false inputs. The normal input condition pulls the input low with alarms letting the pull-up resistor pull the input high. Since the port can also be a digital output, a series current limiting resistor was also added to avoid damaging the DLP-IO8 in the event a digital out command was accidentally sent to the device.





http://www.bb-elec.com/tech_articles/daq_intro.asp


http://www.pencomdesign.com/files/app_note_158.pdf

Pins can be internally pulled to ground through a 10K resistor to prevent floating pins.

Some mechanical devices such as this toggle switch, may exhibit a phenomenon called contact bounce. This happens when the switch makes contact and the connection may bounce back off the contact briefly several times before it settles into position. When switching voltage to turn on a light this would never be a problem, but the input to a microprocessor is so fast that it may pick up these bounces as multiple switch open & closures. You may never see this in your application, but you need to be aware that it can happen. If this is suspected as a problem in your application, read the port twice (or more if needed) and compare the results. By reading the port again and making sure the result is the same, it’s essentially the same as a timed switch de-bounce based technique.