Specifications; Power Requirements; Ttl Inputs And Outputs - National Instruments NI PCIe-8255R Quick Start Manual

Specifications

Power Requirements

TTL Inputs and Outputs

1
The bus power specification assumes that power is provided to the NI 8255R device from the host computer power supply via
the ATX power connector. If power is not supplied through the ATX power connector, camera power is supplied by the PCIe
bus and should be limited to 3 W, shared by both ports.
2
Do not draw more than 100 mA from 30 V isolated outputs. Do not draw more than 50 mA from 5 V isolated outputs.
3
To connect an IEEE 1394a camera to the NI 8255R, you will need a 6-pin to 9-pin cable or a 6-pin to 9-pin adapter.
© National Instruments Corporation
references for the parameters you can set for the NI-IMAQ I/O device
in the Read/Write control. To locate the information, search for
"NI-IMAQ I/O"
These specifications are typical at 25 °C, unless otherwise stated.
IEEE 1394 bus power
2
Isolated supply ...................................... 5 VDC to 30 VDC
3
Camera interface ................................... IEEE 1394b, compatible with
Digital logic levels
Level
Input low voltage (V
Input high voltage (V
Output low voltage (V
Output high voltage (V
TTL Inputs
Number of channels ............................... 2
Maximum pulse rate............................... 2 MHz
Minimum pulse detected ........................ 500 ns
Power-on state........................................ Input (high-impedance)
in LabVIEW Help.
1
........................... 18 W, maximum
(shared by both ports)
IEEE 1394a cameras
Minimum
)
IL
)
IH
), at 5 mA
OL
), at 5 mA
OH
61.9 kΩ pull-up to 5V
11
Maximum
0 V 0.5 V
2.2 V 5 V
— 0.4 V
2.4 V —
NI PCIe-8255R User Manual