50-412 32 Channel Digital I/O - Programmable Threshold0 pages

50-412
32 Channel Digital I/O - Programmable Threshold
●t 32-Channel Input
●t Dual Programmable Voltage Threshold, 0.3 to 50V
●t High Input Voltage Tolerance
●t
●t
●t
●t
●t
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32-Channel Output
High Side or Low Side Driving
0.5A Low Side Sink Capability
0.4A High Side Source Capability
Fully Protected Outputs
High Side External Voltage Input

●t VISA, IVI & Kernel Drivers Supplied for
Windows XP/Vista/7/8
●t 3 Year Warranty

The 50-412 is a 32-channel Digital I/O card with high output voltage and
current capability and a dual variable threshold input.
Each of the 32 channel outputs can be used to drive the output high or low
using a high current capacity drive capable of sourcing 0.4A from the high side
or 0.5A sink on the low side for each channel. Accidental operation of both
the high and low side driver is prevented by the supplied driver. Each output
is fully protected against over-voltage, over-current and thermal overload,
ensuring robust and reliable operation in the toughest test environments.
For high side voltage driving the high side voltage source is supplied from
an external voltage source, permitting the card to drive high capacity loads
without impacting the power supply. For low side driving the external source
can be left unconnected, permitting the card to be used for applications
served by open collector or open drain drivers.

Vext

Output 1
Vext

En

The built in protection systems allow the card to drive relays without the use
of flyback diodes if required since an overvoltage clamp is included.

The 50-412 provides its I/O on an easy to use
78-pin D-type connector which is supported by
a full range of connector accessories.

1

GND

PCI
INTERFACE

Output 2

2

Output 32

32

PCI
BUS

1
Dual
Threshold
Detector

1

2

32
MUX

Attenuator

Ref1

32

Ref2

Functional Diagram 50-412-001 32-Channel Digital I/O
Card With Serial Input Acquisition

pickeringtest.com

ISSUE 1.0 JUL 2013

Each input can withstand the accidental
application of high external voltage to greater
than 100V. The inputs can be user connected
to the driver outputs without risk of damage,
allowing the card to be configured for
operation as 32 channels of independent input
and output or as 32 channels of configurable
I/O.

Low Side
Driver

Digital Inputs

The 32 input channels can be read back
through the PCI interface by comparing the
voltage to two threshold voltages that can
be set between 0.3 and 50V by the user. The
thresholds can be set with 12.5mV resolution,
permitting the user to test the input against
the system test limits that define a logic low or
logic high. The 50-412 uses a series acquisition
to capture the input status using a single set
of comparators. The driver includes a facility to
capture the input status of all 32 channels from
a single command.

High Side
Driver

Digital Outputs

En