Measurement-computing 200 Series DaqBook Manuel d'utilisateur télécharger pdf (Page 20)

3-2 DaqBook Hardware

01-23-02

DaqBook User’s Manual

Performance Factors

DaqBooks are flexible when it comes to analog input capabilities. The A/D maximum sample rate is

100 kHz (divide by number of channels for scan rate) with a 16-channel multiplexer and a programmable-

gain input amplifier. Users can expand channel capacity to 256 analog inputs via expansion modules for

multiplexing RTDs, thermocouples, strain gages, anti-aliasing filters, and simultaneous sample and hold

amplifiers.

Expansion cards and modules attach to the DaqBook’s 37-pin P1 I/O connector.

Reference Note: Connector Pinouts begin on page 3-8.

The DaqBooks can perform 100 kHz scan sequences with programmable delays from 10 µs to 10 hours.

The 100 kHz conversion rate fixes the time skew between channels at 10 µs. The 512-location scan

sequencer allows selection of the input amplifier gain for each channel. DaqBook models /100, /120, /200,

and /260 can each scan 16 digital inputs in the same sequence used for analog inputs; such inputs are thus

time-correlated. Optional simultaneous-sample-and-hold (SSH) cards enable DaqBooks to instantaneously

sample up to 256 channels. Scanning and timing specifications are met, even when a DaqBook system

includes a full complement of expansion modules. All types of transducers are scanned within the same

scan group, and with no intervention from the host PC.

DaqBooks offer a wide selection of triggering capabilities. Scans can be triggered by software, a TTL

signal, or a level of analog input [including slope]. The analog input trigger is hardware-based and

minimizes trigger latency to less than 10 µs.

8 DE/16 SE

analog input

multiplexer

512-step, random access

channel/gain sequencer

rogrammable

equencer

timebase.

0 us to 12 hrs

24-bit general purpose

digital I/O lines

16 high-speed

digital inputs

5 counter/timer

channels

4K word

FIFO

data

buffer

equencer

eset

DIGITAL I/O

ANALOG I/O

Signal

I/O

Computer

I/O

(DAS-16

compatible)

(PIO-12

compatible)

(CTM-05

compatible)

PULSE/FREQ.

HIGH-SPEED

DIGITAL I/O

er channel

mplifier

1, x2

4, x8

00kHz

lock

4 general purpose

digital inputs

-or-

1 auxiliary counter gate

1 TTL trigger input

2 gain select for expansion

nalog Trigger-

omparator

2 or 16-bit,

00 kHz, A-to-D

onverter

Dual 12-bit DAC

-or-

4 digital outputs

for high-speed

channel expansion

4 general purpose

digital outputs

pass-through

to printer

to PC

parallel

port

or EPP

(Note 2)

VDC

Power In

C-DC

onverter

old

ample

rigger

elect

Note 1

: DaqBook/112 and DaqBook/216 do not have P2 or P3 connectors.

Note 2

: DaqBook/100 does not have EPP capability

(+7-20 VDC for /100, /112, and /120)

(+9-18 VDC for /200)

(+10-24 VDC for /216)

DaqBook Block Diagram

Reference Note: A separate block diagram for DaqBook/260 is presented on page 3-12.

(Note 1)

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 53 54

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Measurement-computing 200 Series DaqBook Manuel d'utilisateur Page 20

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