Ver.1.01

DIO-0808TY-USB

3

Cable connection

When connecting the product to an external device, you can

use the supplied connector plug.

For wiring, strip off approximately 9 - 10mm of the covered part

of a wire rod and then insert it to the opening. After the insertion,

secure the wire rod with screws. Compatible wires are AWG

28 - 16.

CAUTION

Removing the connector plug by grasping the cable can

break the wire.

When connecting the connector plug to the product, be sure

to insert it in the interior.

9 - 10mm

- Applicable plug(accessory bundled)

14 pin (Screw Terminal)

Plug header

Input Circuit

External device

Input pin

Signal

common

Vcc

+5V output

GND

GND

Vcc

SN74LVT245B

10k

Ω

Board

PolySwitch

*

Input pin represent I-xx.

*

One PolySwitch is connected to all of the +5V output pins.

The input circuit of this product is illustrated in the above figure.

External digital signals given to signal inputs are TTL levels.

The individual input signals are passedto the personal

computer as active low signals. As each of the signal inputs is

pulled up internally, theoutput of a relay contact or

semiconductor switch can be connected directly between the

signal inputand the signal common pin.

Surge absorption diodes are connected to the input circuit.

Connecting a Switch

GND (CN2 : 1 pin)

I-00 (CN2 : 11 pin)

Switch

When the switch is ON, the corresponding bit contains 1.

When the switch is OFF, by contrast, the bit contains 0.

Output Circuit

External device

Output pin

Vcc

10k

Ω

GND

GND

Un-connected

Board

+5V output

Signal

commmon

Vcc

74LS07

(Open-collector)

PolySwitch

*

Output pin: O-xx

*

One PolySwitch is connected to all of the +5V output pins.

The output circuit of this product is illustrated in the above

figure.

Signal outputs are open-collector outputs; individual output

signals are sent to the external device as active low signals.

Note that each signal output must be pulled up at the external

device as it is not pulled up internally.

Surge absorption diodes are connected to the output circuit.

CAUTION

When the PC is turned on, all output are reset to OFF.

Example of Connection to LED

O-10 (CN1 : 11 pin)

LED

2k

Ω

+5V (CN1 : 14 pin)

When "1" is output to a relevant bit, the corresponding LED comes on.

When "0" is output to the bit, in contrast, the LED goes out.

A protection function, which prevents excessive current flow

from the +5V outputs, is attached to thisterminal. In case of

accidental short of the +5V output and GND, for example, the

function works, andthe terminal operation may become

impossible temporarily. In such a case, you should turn the

PC offand wait for several minutes before you use the terminal

again.

USB

Controll

&

CPU

GND

D-

D+

VCC

Digital Input

Digital Output

Open-Collector

TTL

Receiver

Connecting Input Signals

Output Circuit

A Protection Function of the +5V Outputs

Block Diagram