The NI 6527 devices are 48-bit, parallel, isolated digital I/O interfaces for PCI bus computers and PXI/CompactPCI chassis. The NI 6527 boards have 24 digital inputs and 24 digital switch outputs, and are completely jumperless. With the NI 6527 you can sense digital levels up to 28 VDC and switch currents of up to 120 mA. Because the NI 6527 is isolated, you can protect your system from noise and spikes on external signals and break ground loops.
Digital Input Optically isolated input channels.................... 24, each with its own isolated ground reference Maximum input voltage................................. 28 VDC Digital Logic Levels
Level | Minimum | Maximum |
Input low voltage | 0 VDC | 1V |
Input high voltage | 2 VDC | 28 VDC |
Input current 5 V input................................................... 1.3 mA/channel minimum 24 V input................................................. 7.3 mA/channel minimum Isolation ......................................................... 60 VDC channel-to-channel, and from computer Digital Switch Output Solid-state relay output channels.................... 24, each with two terminals isolated from other channels Relay type ...................................................... Normally open form A solid-state relays Maximum switching voltage AC............................................................. 30 VRMS (42 V peak) DC ............................................................ 60 VDC Maximum switching capacity, 25 °C.............. 120 mA
Common-mode isolation ............................... 60 VDC or 30 VRMS 42 V peak channel-to-channel and from computer On resistance................................................. 35 W maximum Off leakage current (maximum) ..................... 200 nA Relay set time (maximum) .............................. 3.0 ms Relay reset time (maximum) ........................... 3.0 ms Power-on state............................................... Relays open Overcurrent protection on outputs ................ 260 mA, typical Power Requirement +5 VDC (±5%) ............................................... 500 mA, maximum Power available at I/O connector................... +4.5 to +5.25 VDC, fused at 1 A Physical Dimensions (not including connectors) PCI-6527 ................................................... 17.5 by 10.7 cm (6.9 by 4.2 in.) PXI-6527.................................................... 16 by 10 cm (6.3 by 3.9 in.) I/O connector................................................ 100-pin female 0.050 Series D-type Environment Operating temperature.................................. 0 to 50 °C Storage temperature...................................... -20 to 70 °C Relative humidity ........................................... 10% to 90%, noncondensing