Datasheet

NI 651x, Low-Cost Industrial Digital I/O – 30 V, Bank Isolated
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* 32- or 64-bank optically isolated inputs and outputs (±30 VDC) * High-reliability industrial feature set – isolation, programmable power-up states, digital I/O watchdogs, change detection, programmable input filters * Low-cost solution with superior features for data acquisition, manufacturing test, and industrialcontrol applications | * Direct connection to industrial sensors and actuators * NI-DAQmx driver software for highest productivity and performance |
Overview
NI 651x devices are industrial 32- or 64-channel isolated digital I/O interfaces for PCI and PXI/CompactPCI systems. You can wire each input bank in a source or sink configuration and input and output at digital levels up to ±30 VDCwith high current switching capability. NI 651x devices are ideal for general-purpose data acquisition applications as well as industrial control and automated manufacturing test. With high current drive and isolation, you can connect the digital I/O directly to a wide array of 24 V electronic devices, sensors, and actuators. NI 651x devices offer superior features and high value for industrialcontrol and manufacturing test applications such as factory automation, embedded machine control, and production line verification. These devices have been designed to incorporate the latest hardware technologies and provide innovative features for applications requiring ease of use, high reliability, and performance. NI 651x devices take advantage of NI-DAQmx software, which includes technology tospeed up application development with many helpful features including the DAQ Assistant, automatic code generation, and high-performance multithreaded streaming technology.

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Requirements and Compatibility
OS Information * Windows Vista x64/x86 * Real-Time OS * Windows XP | Driver Information * NI-DAQmx | Software Compatibility * ANSI C/C++ * LabVIEW * LabWindows/CVI* Measurement Studio * Visual Studio .NET |

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Comparison Tables
Product | Bus | Input Lines | Output Lines | Isolation | Max Range (VDC) | Low Thresh (VDC) | High Thresh (VDC) | Output Current (mA) |
NI 6510 | PCI | 32 source/sink | - | Bank | ±30 | ±4 | ±11 | - |
NI 6511 | PCI,PXI | 64 source/sink | - | Bank | ±30 | ±4 | ±11 | - |
NI 6512 | PCI, PXI | - | 64 source |Bank | ±30 | - | - | 350 (75) |
NI 6513 | PCI, PXI | - | 64 sink | Bank | ±30 | - | - | 500 (120) |
NI 6514 | PCI, PXI | 32 source/sink | 32 source | Bank | ±30 | ±4 | ±11 | 350 (75) |
NI 6515 | PCI, PXI | 32 source/sink | 32 sink | Bank | ±30 | ±4 | ±11 | 500 (120) |
NI 6516 | PCI | - | 32 source | Bank | ±30 | - | - | 350 (75) |
NI 6517 | PCI | - | 32 sink | Bank | ±30 | - | - | 500(120) |
NI 6518 | PCI | 16 source/sink | 16 source | Bank | ±30 | ±4 | ±11 | 350 (75) |
NI 6519 | PCI | 16 source/sink | 16 sink | Bank | ±30 | ±4 | ±11 | 500 (120) |

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Application and Technology
Note: When using all lines at a 100 percent duty cycle, the maximum drive current for NI 6512 and NI 6514 devices is 75 mA, and 120 mA for NI 6513 and NI 6515 devices. When using onlyone output line in each bank at a 100 percent duty cycle, the maximum drive current for NI 6512 and NI 6514 devices is 350 mA, and 500 mA for NI 6513 and NI 6515 devices.
High-Reliability Industrial Feature Set
NI 651x devices offer a set of high-reliability features designed to automate even the most demanding applications.
* Isolation provides an extended voltage range and directconnection to industrial sensors and actuators
* Programmable power-up states offer safe operation when connected to pumps/valves/motors/relays 
* Digital I/O watchdogs detect computer or application errors and ensure safe recovery 
* Change detection triggers your application and returns I/O data after a digital event with minimal processor usage 
* Programmable input filters eliminate...