B&B Electronics 4 Channel Input Buffer Board SDAIBB Manuale Utente Scaricare il pdf (Pagina 18)

14 Chapter 2 Documentation Number UD128A8D4602 Manual

B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104

B&B Electronics Ltd – Westlink Comm. Pk. – Oranmore, Galway, Ireland – Ph 353-91-792444 – Fax 353-91-792445

Operational Check - Connections

A Digital voltmeter or DC coupled oscilloscope is recommended for

checking signal levels and noise

Use a Terminal Blocks to DB25 connector for preliminary connections or

make your connections using the terminals on your prototype interface

board (prototyping board not included).

Steps - Refer to the I/O Pinouts (facing page)

1. Connect D/A output channels 0-3 to 4 of the A/D input channels

(Connections can verify D/A outputs and A/D inputs)

2. Connect a variable voltage source to the remaining A/D channels.

(as below) or connect to ground or +5V.

Analog

Input

UD128A8DExternal Circuit

Analog

GND

100 K

POT

5VDC

Fig. 2.1 - Analog Input using potentiometer for sensing position

3. Connect each digital output to a 2.2K to 3.2K resistor and LED.

Digital

Output

DIG

GND

UD128A8DExternal Circuit

2.2K

LED

Fig. 2.2 - Digital Output Active High LED On

3. After starting the BB-Dac Application and defining outputs, test the

digital inputs:

Connect each digital input to a 2.2K ohm resistor and then to ground or D-

REF+5 (see Figure 2.3 or 2.4).

When done, disconnect test connections and connect your devices.

Common Connections – Example Figures are shown later in this chapter as

a guide for commonly used inputs and outputs.

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B&B Electronics 4 Channel Input Buffer Board SDAIBB Manuale Utente Pagina 18