Measurement-computing IOtech 640 Series Bedienungsanleitung PDF herunterladen (Seite 74)

Specifications are subject to change without notice.

11-4 Specifications 879592 IOtech 640 and 650 Series

Digital I/O Lines Note: To make use of Digital I/O, eZ-TOMAS or eZ-NDT software must be

running in the host PC.

Channels: 8 Digital I/O, programmable as inputs or

outputs on a line by line basis

Ports: 1 x 8-bit, Each bit is programmable as input or

output

Power-up mode: Inputs pulled low

Connector: DB-9 female (figure)

Input Scanning Modes: 2 programmable scanning modes Asynchronous, under program control at any

time relative to Analog scanning; Synchronous with Analog scanning

Input Protection: ±5.6V

Input Levels:

Low: 0 to +0.8V

High: +2.0V to +5.0V

Output pull-down resistor: 10kΩ

Output voltage range: 0 to +3.3V, may be pulled up to +5V

Output resistance: 100Ω

Output Levels:

Low: < 0.8V

High: >3.0V with no load

Sampling:

105,468Hz, maximum

Note: A Digital I/O example is located in section 11.b.

See Figure XXI. Digital I/O I-V Curve

Output timing: Outputs are always written asynchronously.

DB9 – As viewed from the rear panel. Outer numbers are

digital channels. Inner numbers are pin designations.

Input / Output Circuit

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Measurement-computing IOtech 640 Series Bedienungsanleitung Seite 74