Page 1.2 OPTO-ISOLATED DIGITAL I/O MODULE 40-490/491
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SECTION 1 - TECHNICAL SPECIFICATION
Opto Isolated Digital I/O – 40-490/491
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Specifications
Specification
Inputs
Type: Inputs are low pass ltered and clamped to
reject transients. The electrical time constant
at the inputs is approximately 3.5ms. Inputs
are pulled low, and present a load of greater
than 3.3KΩ to the source.
Input Threshold: 6V (40-490) or TTL (40-491).
Max Voltage*: The input connections can withstand the
application of voltages to 40V.
Read Time: 1ms typical excluding input lter settling
time.
Outputs
Switch Type: High side FET switch
Protection: Switch protected against overcurrent,
overvoltage, overtemperature and inductive
loading. Clamp diode limits voltage
excursion below negative voltage.
Switch Ratings
Voltage*:
Current:
+40V relative to negative output.
400mA for single output, 1A for any group of
8 outputs sharing power and return pins.
Write Time: 2ms typical excluding any external ltering.
Internal Isolated 5VDC supply (DC to DC Converter)
Type: Fully regulated, short-circuit protected.
Rating: 5VDC +/-2%. A maximum of 350mA may be
drawn externally.
External DC Voltage Versions
Requirement: 5VDC +/-5% at 50mA, isolated.
* For full voltage rating, signal sources must be fully isolated from
mains supply and safety earth.
Power Requirements
Power consumption from the 5V backplane supply is as follows:
Operating/Storage Conditions
Operating Conditions
Operating Temperature:
Humidity:
Altitude:
0°C to +55°C
Up to 90% non-condensing
5000m
Storage and Transport Conditions
Storage Temperature:
Humidity:
Altitude:
-20°C to +75°C
Up to 90% non-condensing
15000m
PXI & CompactPCI Compliance
The module is compliant with the PXI Specication 2.2. Local Bus,
Trigger Bus and Star Trigger are not implemented.
Uses a 33MHz 32-bit backplane interface.
Safety & CE Compliance
All modules are fully CE compliant and meet applicable EU
directives: Low-voltage safety EN61010-1:2010, EMC Immunity
EN61326-1:2013, Emissions EN55011:2009+A1:2010.
+3.3V +5V +12V -12V
0 0.36A 0 0
Mechanical Characteristics
Single slot 3U PXI (CompactPCI card).
3D models for all versions in a variety of popular le formats are
available on request.
Connectors
PXI bus via 32-bit P1/J1 backplane connector.
Signals via front panel 68-pin female micro-D connector, for pin
outs please refer to the operating manual.
Custom options
Alternate values may be substituted in the input lter circuits to
obtain different lter or threshold characteristics.
Additional resistors may be tted to pull inputs up to a user-
supplied positive voltage.
