Ver.1.03

DI-16TY-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 passed to the personal

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

pulled up internally, the output of a relay contact or

semiconductor switch can be connected directly between the

signal input and 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.

A protection function, which prevents excessive current flow

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

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

function works, and the terminal operation may become

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

PC off and wait for several minutes before you use the terminal

again.

USB

Controll

&

CPU

GND

D-

D+

VCC

Digital Input

Digital Input

TTL Receiver

TTL Receiver

Connecting Input Signals

A Protection Function of the +5V Outputs

Block Diagram