Ttl Outputs - National Instruments NI PCIe-8255 Quick Start Manual

Optically Isolated Inputs and Outputs
NI PCIe-8255R User Manual

TTL Outputs

Number of channels................................10
Output voltage range ..............................0 V to 5 V
Maximum pulse rate ...............................2 MHz
Isolated (Current Sinking) Inputs
Number of channels................................13
Input voltage range .................................0 V to 30 V
Input ON voltage .............................3.5 V to 30 V
Input OFF voltage............................0 V to 2 V
Turn-on current.......................................7.1 mA, typical
Maximum pulse rate ...............................100 kHz
Minimum pulse detected ........................10 μs
Reverse polarity protection.....................Yes, –30 V
Isolated (Current Sourcing) Outputs
Number of channels................................4
On-state voltage range ............................5 V to 30 V, maximum
Maximum on-state voltage
drop from V .....................................1.2 V at 100 mA
Output current
5 V isopower....................................50 mA, maximum
24 V isopower..................................100 mA, maximum
30 V isopower..................................100 mA, maximum
Maximum pulse rate ...............................10 kHz (maximum load
Minimum pulse generated ......................100 μs
Reverse polarity protection.....................Yes
14 mA, maximum
resistance 100 kΩ)
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