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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.
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.
Signal
I/O
P1
ANALOG I/O
(DAS-16
compatible)
(Note 1)
P2
DIGITAL I/O
(PIO-12
compatible)
(Note 1)
P3
PULSE/FREQ.
HIGH-SPEED
DIGITAL I/O
(CTM-05
compatible)
Note 1: DaqBook/112 and DaqBook/216 do not have P2 or P3 connectors.
Note 2: DaqBook/100 does not have EPP capability
3-2
DaqBook Hardware
Reference Note: Connector Pinouts begin on page 3-8.
8 DE/16 SE
analog input
multiplexer
4 digital outputs
for high-speed
channel expansion
-or-
4 general purpose
digital outputs
4 general purpose
digital inputs
-or-
1 auxiliary counter gate
1 TTL trigger input
2 gain select for expansion
Dual 12-bit DAC
24-bit general purpose
digital I/O lines
16 high-speed
digital inputs
5 counter/timer
channels
Reference Note: A separate block diagram for DaqBook/260 is presented on page 3-12.
PGA
x1, x2
Sample
x4, x8
Hold
per channel
512-step, random access
Sequencer
channel/gain sequencer
reset
Trigger
Select
Analog Trigger-
Comparator
DaqBook Block Diagram
01-23-02
Amplifier
12 or 16-bit,
100 kHz, A-to-D
&
Converter
100kHz
Clock
Programmable
4K word
sequencer
FIFO
timebase.
data
10 us to 12 hrs
buffer
+5
+15
DC-DC
VDC
-15
converter
Power In
(+7-20 VDC for /100, /112, and /120)
(+9-18 VDC for /200)
(+10-24 VDC for /216)
OMB-DaqBook User's Manual
Computer
I/O
P4
to PC
parallel
port
or EPP
(Note 2)
P5
pass-through
to printer
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