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Analog and Digital I/O
Model 626
Features
Six versatile 24-bit counters for encoders/timers
with interrupt generation
QNX driver
Battery backup of counters
Four 14-bit D/A outputs, 20 kHz update rate
Sixteen 14-bit differential A/D inputs, 50 kHz rate
Watchdog timer may be used to reset PCI bus
48 bi-directional digital signals for solid state relay
boards, 20 with edge detection & interrupts
Description
Each counter may be
Watchdog
The Sensoray Model 626
programmed to function as a The 626's watchdog timer
low cost interface saves
timer using the 626's internal may be connected to the
space in PCI bus systems
clock or an external clock.
bus reset via a 2-pin
by combining five
When paired, 48-bit
connector. It may be
functions into a half-size
counters may be used for
enabled or disabled under
card. Five flat cables
frequency measurement.
program control. The timer
connect the Model 626 to
is automatically disabled
external breakout boards.
whenever a bus reset
occurs.
Encoders and Counters
Digital I/O
Three 24-bit up/down
counter pairs may be
A/D
configured for six
Sixteen differential input
incremental encoders
channels are multiplexed to
each having 24-bits of
a sample/hold and
The model 626's fortyeight digital lines have
standard pin outs for solidstate relay boards. Each
resolution. Each channel
successive approximation
line is software
accepts two phased TTL
A/D. Each channel may be
programmable as an input
or RS-422 signals plus an
programmed for  5V or 
or output. Forty inputs
index signal to track
10V. No trim adjustments
may be programmed for
encoder direction and
are needed.
edge detection and
displacement. Each input
interrupts. The status of
is conditioned and
D/A
synchronized to the 626's
Four voltage outputs may be monitored by software.
internal clock.
programmed for  10 volts.
Whenever a system reset
A unique circuit prevents
occurs all output channels
unpredictable D/A outputs
are turned off.
Unlike conventional
counters, the 626's
counters do not
accumulate errors when
the encoder dithers or
changes direction. The
during CPU initialization. All
outputs are reset to zero
volts whenever a bus reset
occurs.
output lines may be
Software
All the features of model
626 may be exercised
using software
626 supplies 5 volt power
development kit,
to each encoder channel.
SDK626. This 32-bit DLL
All counters are
for Windows 95/98 and
programmable and may
NT allows the use of
optionally generate
multiple 626 boards. QNX
interrupts.
driver available.
The counter channels
have a battery backup
feature that keeps them
running during a power
failure. The 626's battery
charger will recharge an
external 3.6V NiCd when
power is restored.
Ordering Information
Specifications
Analog I/O Accessory
General
Operating
0 C to 70C
7505TDIN
rails
temperature
PC bus interface
Terminal board with DIN
PCI, 32-bit, 33 MHz
18" analog cable, 50-pin
7501C
Input power
< 3 watts
1 meter analog cable, 50-
7501C1
pin
A/D Converter
Conversion time
20 microseconds
Digital I/O Accessory
Number of channels
16 differential
18" digital cable, 50-pin
Input resistance
100 Megohms
1 meter digital cable, 50-pin 7501C1
CMRR
100 dB minimum
24 position relay board
720RB
Max. common mode
5 volts
24 position relay board with
720RB-
DIN mounting hardware
DIN
voltage
Resolution
16-bits
Accuracy
14-bits
Input ranges
+/-10,  V
Offset error
+/- 1/2 LSB
Encoder Accessory
18" encoder cable, 26-pin
7503C
1 meter encoder cable, 26-
7503C1
pin
Encoder terminal board with 7503T-
D/A converter
DIN snap rails
Conversion time
20 microseconds
NiCd battery, 3.6V
Resolution
13-bits
Offset error
+/- 2 bits
Output voltage
+/- 10 volts
Output resistance
87 ohms
Digital I/O
7501C
DIN
Number of channels
48 bi-directional
Output voltage
0 to 5 V open
collector
Output sink current
100 mA @1.1 V
Encoder I/O
Number of channels
6 quadrature, 24-bit
Input voltage
TTL or RS-422
Input frequency
2 MHz w/internall
clock
1 MHz w/external
clock
Quadrature multiplier x1, x2, x4
Watchdog Timer
Time-out
1/8, 1/4, 1, 10 sec
2-pin connector may be connected to the
bus reset line to allow a system reset
from software