NIPCI-6520 NI | Alldatasheet

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60 V, Channel-to-Channel Isolated

than -11 V or greater than +11 V. Form C relays and five single-pole single-throw (SPST) Form A relays.

60 VDC or 30 Vrms with maximum current of 2 A and maximum

and maximum voltage (current = power/voltage).

  • Isolation provides an extended voltage range for direct connection to industrial sensors and actuators
  • Programmable power-up states provide safe operation when connected to pumps/valves/motors/relays
  • Watchdogs timer detects computer or application crashes and ensures safe recovery to know digital I/O states
  • Change detection triggers your application and returns I/O data after a digital event to minimize processor usage
  • Programmable input filters eliminate glitches/spikes and remove noise
  • 8 channel-to-channel optically isolated inputs, ±30 VDC
  • 8 nonlatching mechanical relay outputs
  • ±60 V switching voltage with maximum switching current of 2 A and maximum switching power of 60 W
  • High-reliability industrial feature set, includes: isolation, programmable power-up states, digital filtering, watchdog timers, and change detection
  • NI measurement services software for highest productivity and performance Operating Systems
  • Windows 2000/NT/XP
  • LabVIEW Real-Time Recommended Software
  • LabVIEW
  • LabWindows/CVI
  • Measurement Studio Other Compatible Software
  • C, C++
  • Microsoft Visual Studio .NET 2003 Measurement Services Software (included)
  • NI-DAQmx driver, version 7.5 or higher NI PCI-6520 Product Bus INPUT OUTPUT Industrial Feature SetInputs Isolation Low Threshold High Threshold Mechanical Relay Outputs Max Voltage Max Current Max Power NI 6520 PCI 8 Channel-to-channel ±4 VDC ±11 VDC 8 ±60 VDC, 42.5 Vp, ±30Vrms 2 A 60 W

Table 1. NI 6520 Specifications Overview

environments containing machinery and inductive loads. your computer can boot and your software application can begin running. never go through an incorrect state during power up.

  • Computer crash – total OS crash
  • Application crash – software application ceases to respond
  • Driver crash – device driver ceases to respond
  • PCI bus failure – communications cease to respond With watchdogs, the digital outputs go to a safe state when a fault condition is detected and recover safely after the watchdog timer expires. Watchdogs are important whenever the module is connected to actuators such as pumps, valves, motors, and relays. The PCI-6520 monitors the software application; if the application fails to reset the watchdog timer within the time limit, the device automatically sets the output lines to a user-defined safe state. The PCI-6520 remains in the watchdog state until the watchdog timer is disarmed by the application and new I/O values are written, the PCI-6520 is reset, or the computer is restarted. Trigger Your Application with Change Detection With change detection, you can automatically trigger your software application to perform a digital read operation upon a digital change of state. A digital change of state is defined as the rising edge (0 to 1 transition) or falling edge (1 to 0 transition) on one or more digital lines. Using change detection, you can monitor for digital events with minimal processor usage. No polling is necessary because the digital I/O module generates an interrupt to automatically wake up your application. Using NI-DAQmx software technology, PCI-6520 notifies the software application when the event is detected, causing the application to automatically perform a read operation. To minimize the effects of noisy input lines, use programmable input filters in combination with change detection to eliminate spurious change detection events caused by noise or glitches. NI-DAQmx also includes multithreaded streaming technology so digital change detection events can occur independent of other data acquisition activities such as analog input or output events. Eliminate Noise with Programmable Input Filters Programmable input filters remove noise, glitches, and spikes on inputs, and also provide debouncing for digital switches and relays. This feature is important for applications in noisy industrial environments to prevent false readings caused by noise. You can configure the programmable input filter for each digital line by setting the filter time in seconds. Any digital noise, glitch, or spike that is shorter than half of the specified filter time will be blocked by the digital I/O device, preventing invalid readings and false triggers for change detection events.

Figure 1. PCI-6520 Hardware Block Diagram

Low-Cost Industrial Digital I/O – 60 V, Channel-to-Channel Isolated BUY ONLINE at ni.com or CALL (866) 265 9891 (U.S.) Low-Cost 37-Pin Accessories Several low cost accessory options are available for connectivity to the 37-pin D-Sub connector of the PCI-6520. CB-37FH – 37-pin female D-Sub horizontal terminal block that mounts in line with the DIN rail. CB-37FV – 37-pin female D-Sub vertical terminal block that mounts perpendicular to the DIN rail. CB-37F-LP – 37-pin female D-Sub screw-terminal accessory for direct connect to board or optionally via cable. SH37F-37M – 37-pin D-Sub female-to-male shielded I/O cable. R37F-37M-1 – 37-pin D-Sub female-to-male ribbon I/O cable. SH37F-P-4 – 37-pin D-Sub shielded female-to-pigtail cable. TB-37F-37CP – 37-pin female D-Sub crimp and poke termination accessory for custom cabling. High-voltage rated for Cat II, 150 VDC/VAC. TB-37F-37SC – 37-pin female D-Sub solder cup termination accessory for custom cabling.

Ordering Information

For information on extended warranty and value added services, visit ni.com/services. BUY NOW! For complete product specifications, pricing, and accessory information, call (800) 813 3693 (U.S. only) or go to ni.com/daq. Family Accessory Cable PCI-6520 CB-37FH (778673-01) SH37F-37M (778621-01, 778621-02) R37F-37M-1 (779195-01) CB-37FV (778672-01) SH37F-37M (778621-01, 778621-02) R37F-37M-1 (779195-01) TB-37F-37CP (779185-01) – TB-37F-37SC (779184-01) – CB-37FH CB-37F-V CB-37F-LP SH37F-37M R37F-37M-1 SH37F-P-4 TB-37F-37CP

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