Measurement-computing 6224 Manual do Utilizador descarregar pdf (Página 40)

Specifications are subject to change without notice.

6224 User’s Manual Specifications 9-3

Digital I/O

Channels:

8 Digital I/O, programmable as a

single port, or as individual lines

Power-up mode:

Inputs pulled low

Connector:

DB-9 female (figure)

DB9 – As viewed from the rear panel.

Programmable Input Scanning Modes:

Asynchronous: ............................................................. Under program control at any time relative to analog

scanning.

Synchronous: ............................................................... Data captured synchronously with the analog

channels.

Input Levels:

Low: ........................................................................... 0 to +0.8V

High: ........................................................................... +2.0V to +5.0V

Input Voltage Range without Damage: .............................. -0.6V to

+5.6V max

Input pull-down resistor: .................................................... 10kΩ

Output voltage range: ........................................................ 0 to +3.0V

(may be externally pulled up to 5.6V without damage)

Output resistance: ............................................................... 40Ω

Output Levels: (see 6000 Series Digital Output graph below)

Sampling: .......................................................................... 1 MHz max

continuous

Output timing: ................................................................... Outputs are always written asynchronously.

Input / Output Circuit

Digital I/O

Channel/Line

Numbers

1 2 ... 35 36 37 38 39 40 41 42

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Measurement-computing 6224 Manual do Utilizador Página 40