Esttl Outputs; Digital Output Characteristics; Physical Specifications And Characteristics - National Instruments NI 9754 User Manual

Ni powertrain controls engine-synchronous ttl output module

ESTTL Outputs

Each TTL output channel has a DO pin to connect a device that accepts a digital command signal

from 0 V to 5 V. The eight output channels are internally referenced to COM, so you can use

any of the nine COM lines as a reference for the external signal. Each channel has a pull-down

resistor and includes overcurrent, overvoltage, and short-circuit protection.

Overcurrent Protection

The NI 9754 allows only a specified amount of current for switching output channels or sourcing

the output load. If the NI 9754 goes into an overcurrent state by exceeding the specified

maximum switching frequency or the output load, the power supply begins to drop in voltage

until it completely turns off or the overcurrent condition is removed. When the NI 9754 is in this

state, it can accept new output state data.

Overvoltage Protection

The TTL outputs of the NI 9754 are temporarily protected from +/-30 V one channel at a time.

Continued exposure to overvoltage conditions will degrade the life of the NI 9754.

Digital Output Logic Levels at 10 mA loads

High ..................................................................4.0 V to 5.0 V

Low ................................................................... 0.1 V to 0.4 V

Weight ...............................................................170 g

Maximum Altitude............................................2000 m

Maximum Ambient Temperature......................70 ºC

Operating Humidity ..........................................10% to 90% RH, noncondensing

Pollution Degree ...............................................2

Ingress Protection .............................................IP40

For indoor use only.

If you need to clean the module, wipe it with a dry towel.

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