PCI-6514 64-Channel Bank-Isolated Digital I/O Device
Земля PCI-6514 is a bank-isolated industrial digital I/O device for PCI systems. It provides 32 isolated digital inputs and 32 isolated sourcing digital outputs for monitoring sensors, controlling industrial equipment and interfacing automated test systems with external 30 V logic.
The input channels accept both sinking and sourcing signals, while the sourcing outputs are suited to PNP-style industrial control circuits. Eight isolated banks, programmable input filters, digital watchdogs and selectable power-up states help the PCI-6514 provide reliable control in factory automation, machine monitoring and production test applications.
Key Features of the PCI-6514
- 64 total industrial digital I/O channels
- 32 sink/source isolated digital inputs
- 32 sourcing isolated digital outputs
- Eight banks with eight lines per bank
- 30 VDC maximum industrial signal level
- Bank-to-bank and bank-to-bus isolation
- Programmable digital input filters
- Programmable output power-up states
- Digital I/O watchdog protection
- Output current up to 350 mA on one line per port under applicable conditions
- Self-resetting fuse protection for each output port
- 100-pin keyed female SCSI connector
- NI-DAQmx software support
- PCI bus interface
PCI-6514 Technical Specifications
| Product Model | PCI-6514 |
|---|---|
| Part Number | 778836-01 |
| Product Type | Bank-isolated industrial digital I/O device |
| Шинный интерфейс | PCI |
| Total Number of Channels | 64 |
| Digital Inputs | 32 sink/source inputs |
| Digital Outputs | 32 sourcing outputs |
| Isolation Architecture | Eight banks, eight lines per bank |
| Maximum Input Voltage | 30 VDC |
| Input Low Level | 0 to ±4 VDC |
| Input High Level | ±11 to ±30 VDC |
| Maximum Output Switching Voltage | 30 VDC |
| Тип вывода | Sourcing, PNP-style control |
| Maximum Single-Line Output Current | Up to 350 mA on one line per port, subject to temperature derating |
| Input Propagation Delay | 75 µs typical |
| Output Propagation Delay | 80 µs typical with a 100 Ω load |
| Common-Mode Isolation | 30 VDC bank-to-bank and bank-to-bus |
| Power-Up Output State | Default 0 or open; programmable as logic 0 or logic 1 |
| Output Protection | Self-resetting fuse per output port |
| Watchdog | Programmable digital I/O watchdog |
| Input Filtering | Programmable digital filters |
| Front Connector | 100-pin keyed female SCSI |
| Поддержка программного обеспечения | НИ-DAQmx |
PCI-6514 Part Number and Accessories
| Item | Part Number | Описание |
|---|---|---|
| PCI-6514 | 778836-01 | 64-channel bank-isolated PCI digital I/O device with 32 inputs and 32 sourcing outputs |
| SH100M-100M Flex Cable | 185095-01 | 1 m shielded 100-pin cable for connecting the device to compatible accessories |
| R100M-50F-50F Cable | 182762-02 | 2 m unshielded cable that divides the 100-pin connector into two 50-pin connectors |
| SCB-100A | 785024-01 | Shielded 100-pin desktop connector block for field wiring and noise-sensitive installations |
| CB-50 | 776164-90 | DIN-rail-mountable 50-pin connector block for industrial field wiring |
| CB-50LP | 777101-01 | Low-cost unshielded 50-pin connector block |
The PCI-6514 has a 100-pin front connector. An SH100M-100M cable can connect it directly to a compatible 100-pin accessory. When an R100M-50F-50F cable is used, two 50-pin connector blocks may be required to access all available signals.
32 Isolated Digital Inputs
The PCI-6514 provides 32 industrial digital input channels. The inputs are organized into four banks of eight lines, with each bank sharing its own isolated reference connection.
Input channels can detect signals from switches, proximity sensors, limit switches, alarms, relays, programmable logic controllers and other industrial devices. The channels support both sinking and sourcing signal configurations, making them compatible with a broad range of PNP and NPN field devices.
32 Sourcing Digital Outputs
The device includes 32 sourcing digital outputs divided into four banks of eight lines. A sourcing output supplies positive current from an external field power source to the connected load.
This high-side switching arrangement is commonly used with PNP industrial control circuits. Typical loads include external relays, indicator lamps, solenoids, valves and controller inputs, provided their voltage, current and transient characteristics remain within the device ratings.
Eight Bank-Isolated Ports
The 64 channels are divided into eight isolated banks containing eight lines each. All channels within a bank share the corresponding bank ground or power connection, while separate banks can be connected to different field references within the isolation ratings.
Bank isolation helps separate the computer from industrial wiring and reduces the effect of ground-potential differences. It also allows a test or control system to divide its field signals into independent functional groups.
30 V Industrial Signal Compatibility
The PCI-6514 supports industrial digital signals up to 30 VDC. This allows it to interface with common 12 V and 24 V factory-automation equipment while retaining margin for supported signal tolerances.
The isolated inputs recognize a low state from 0 to ±4 VDC and a high state from ±11 to ±30 VDC. Voltages in the undefined region between these limits should be avoided to ensure reliable state detection.
Sinking and Sourcing Input Support
Each input can detect either current-sinking or current-sourcing field signals when wired correctly. This flexibility allows the PCI-6514 to monitor PNP sensors, NPN sensors, dry contacts and other industrial devices without requiring separate input models.
Before wiring the system, determine whether the field device sources current to the input or sinks current from it. Connect the bank reference and field supply according to the sensor’s output circuit and the PCI-6514 pinout.
Output Current and Temperature Derating
The available sourcing-output current depends on the number of active lines and the surrounding temperature. At ambient temperatures up to 25°C, all eight lines in a port can source as much as 75 mA per line, while one line in a port can source as much as 350 mA.
| Ambient Temperature | All Eight Lines per Port | One Line per Port |
|---|---|---|
| 25°C or below | 75 mA per line | 350 mA |
| 35°C or below | 65 mA per line | 350 mA |
| 45°C or below | 55 mA per line | 350 mA |
| 55°C or below | 50 mA per line | 300 mA |
These limits apply under the specified operating conditions. Verify the combined port current, ambient temperature, enclosure airflow and load duty cycle when several outputs will operate simultaneously.
External Field Power Supply
The isolated sourcing outputs require an external field power supply. The PCI-6514 switches this external voltage to the load; it does not generate the industrial output voltage from the PCI bus.
The power supply must provide sufficient voltage and current for every energized load. Include appropriate fusing, grounding and transient suppression in the external circuit.
Programmable Input Filters
Programmable digital filters can reject input pulses shorter than the selected filter interval. This feature helps prevent electrical noise, mechanical contact bounce and brief transients from being interpreted as valid digital events.
Filtering is useful when monitoring switches, relays and sensors in electrically noisy industrial environments. Select a filter interval that removes unwanted transitions without concealing legitimate changes required by the application.
Digital I/O Watchdog
The PCI-6514 includes a programmable watchdog that can monitor communication between the application and the device. If software stops updating the watchdog, selected output lines can enter predefined safe states.
This capability helps place controlled equipment in a predictable condition following an application crash, computer failure or communication interruption. Safe-state behavior should be tested as part of the complete machine risk assessment.
Programmable Power-Up States
Output lines normally power up in an inactive or open state, but the PCI-6514 supports programmable power-up values. Defined initial states help prevent connected equipment from entering an unintended condition while the operating system and control application start.
Power-up configuration and watchdog configuration address different events. The power-up state applies during system initialization, while the watchdog responds to a loss of software control after operation begins.
Output Port Protection
Each output port includes self-resetting fuse protection. The protection helps limit damage caused by excessive current in a bank and automatically resets after the fault is removed and the protection device cools.
The internal protection is not a substitute for properly rated external fuses, current-limited field supplies or load-transient suppression. These measures remain important for controlling fault energy in industrial wiring.
Inductive Load Protection
Relays, solenoids, valves and other inductive loads can generate a high reverse voltage when switched off. Install a flyback diode, transient suppressor or other suitable suppression circuit close to the load.
Without suppression, repetitive voltage transients can affect output reliability and introduce noise into nearby sensor and communication wiring. The suppression component must be selected for the load voltage, current and required release time.
Typical PCI-6514 Applications
- Промышленное управление станками
- Автоматизация производства
- Production-line monitoring
- Автоматизированное испытательное оборудование
- 24 V sensor monitoring
- PNP and NPN sensor interfacing
- Relay and solenoid control
- Управление клапаном и приводом
- Alarm and indicator control
- Interlock monitoring
- Manufacturing fixture control
- Process monitoring
- Machine status acquisition
Автоматизация производства
In factory-automation systems, the PCI-6514 can monitor proximity sensors, limit switches and machine-status contacts while controlling relays, indicators, pneumatic valves and other moderate-current loads.
Its mixed input and output configuration allows one PCI slot to handle both sensing and control tasks. Separate isolated banks can be assigned to different machine sections or field power domains.
Automated Test Equipment
The device can control test-fixture relays, indicators, interlocks and pneumatic actuators while monitoring fixture switches and device-under-test status signals. Programmable outputs eliminate the need for manual switching during automated test sequences.
Watchdog and power-up functions help return fixture control lines to known states if the test application loses communication with the board.
Sensor Monitoring
The isolated inputs can monitor industrial sensors operating at voltage levels that cannot be connected directly to standard TTL digital I/O. Both sourcing and sinking input compatibility simplify integration with mixed sensor types.
Programmable filtering is especially valuable for mechanical switches and long field-wiring runs that may be affected by contact bounce or coupled electrical noise.
Relay, Valve and Solenoid Control
The sourcing outputs can energize compatible DC relays, pneumatic valves and solenoids. The field supply and load return must be connected according to the sourcing-output wiring diagram.
Check steady-state current, initial inrush current and inductive turn-off energy before connecting a load. An interposing relay or external driver may be required for loads that exceed the PCI-6514 output ratings.
NI-DAQmx Software Support
The PCI-6514 is controlled using the NI-DAQmx driver. Applications can configure input and output lines, read port states, write output values, enable filters, configure watchdog behavior and define power-up states.
NI-DAQmx supports LabVIEW, LabWindows/CVI, C/C++ and compatible .NET development environments. The device can also be configured and tested in NI Measurement & Automation Explorer.
PCI System Integration
The PCI-6514 installs in a compatible desktop or industrial computer with an available PCI slot. Before installation, verify operating-system support, NI-DAQmx compatibility, chassis airflow and space for the 100-pin cable.
The card is intended for industrial static digital control and monitoring. Applications requiring precisely hardware-timed digital waveforms should use a device specifically designed for correlated or clocked digital I/O.
PCI-6514 Troubleshooting
The PCI-6514 is not detected in NI MAX
Confirm that the card is fully seated in a compatible PCI slot. Check whether the operating system detects the PCI device and verify that a supported version of NI-DAQmx is installed. Restart the computer and refresh the device list in NI MAX.
An input does not change state
Check the field voltage, input wiring and isolated bank reference. Confirm that the sensor’s sourcing or sinking configuration matches the selected wiring arrangement. Also verify that the input filter is not configured to reject the expected pulse duration.
A sourcing output does not energize the load
Verify that an external field supply is connected to the output bank and that the load is wired between the output and the appropriate return. Confirm the programmed output state and measure the field-supply voltage under load.
An output port repeatedly shuts down
Disconnect the loads and inspect the wiring for shorts or excessive current. Check the current required by every active channel and compare the total with the applicable temperature-derated limit.
The load remains active after communication fails
Confirm that the watchdog is enabled, serviced by the application and configured with the required expiration states. Test the watchdog by intentionally stopping communication under controlled conditions.
Inputs change unexpectedly
Inspect grounding, field wiring, shielding and cable routing. Separate input cables from motors, contactors and variable-frequency drives. Configure an appropriate input filter when short noise pulses do not need to be detected.
The output voltage is lower than the field supply
Sourcing outputs introduce an internal voltage drop that increases with load current. Measure both the field supply and the output under load, then verify that the connected equipment still receives its required operating voltage.
NI-DAQmx reports that the device is reserved
Close other programs and test panels that may be using the board. Stop and clear any existing NI-DAQmx tasks before attempting to reserve the device again.
PCI-6514 Comparison
| Модель | Channel Configuration | Тип вывода | Best Suited For |
|---|---|---|---|
| PCI-6511 | 64 isolated inputs | Input only | High-channel-count industrial signal monitoring |
| PCI-6512 | 64 isolated outputs | Источники | High-channel-count PNP and high-side load control |
| PCI-6513 | 64 isolated outputs | Sinking | High-channel-count NPN and low-side load control |
| PCI-6514 | 32 inputs and 32 outputs | Источники | Mixed industrial monitoring and PNP-style control |
| PCI-6515 | 32 inputs and 32 outputs | Sinking | Mixed industrial monitoring and NPN-style control |
| PCI-6518 | 16 inputs and 16 outputs | Источники | Lower-channel-count sourcing applications using a 37-pin interface |
| PCI-6519 | 16 inputs and 16 outputs | Sinking | Lower-channel-count sinking applications using a 37-pin interface |
PCI-6514 vs PCI-6515
The PCI-6514 and PCI-6515 both provide 32 isolated inputs and 32 isolated outputs. Their principal difference is the output circuit: the PCI-6514 has sourcing outputs, while the PCI-6515 has sinking outputs.
Choose the PCI-6514 for high-side or PNP-style control in which an active output supplies positive current to the load. Choose the PCI-6515 for low-side or NPN-style control in which an active output provides a current path to ground.
PCI-6514 vs PCI-6518
The PCI-6514 provides 32 inputs and 32 sourcing outputs through a 100-pin connector. The PCI-6518 provides 16 inputs and 16 sourcing outputs through a lower-density 37-pin connector.
Select the PCI-6514 when additional industrial I/O channels are required in one PCI slot. Select the PCI-6518 when 32 total channels are sufficient or when a 37-pin accessory system is preferred.
PCI-6514 vs PCI-6512
The PCI-6514 combines 32 inputs with 32 sourcing outputs. The PCI-6512 is an output-only device offering 64 sourcing channels.
Choose the PCI-6514 when the application needs both monitoring and control. Choose the PCI-6512 when the main requirement is controlling a larger number of sourcing loads.
Recommended Related Products
- PCI-6515 64-Channel Bank-Isolated Digital I/O Device
- PCI-6512 64-Channel Sourcing Digital Output Device
- PCI-6513 64-Channel Sinking Digital Output Device
- PCI-6518 32-Channel Isolated Digital I/O Device
- PCI-6519 32-Channel Isolated Digital I/O Device
- PCI-6511 64-Channel Isolated Digital Input Device
- View More NI PCI and USB Data Acquisition Products
Selecting the Right Industrial Digital I/O Device
Choose the PCI-6514 when the application requires 32 isolated industrial inputs, 32 sourcing outputs, 30 V signal compatibility and a traditional PCI interface. It is particularly suitable for systems using PNP sensors and high-side load control.
Select the PCI-6515 when sinking outputs are required. Consider the PCI-6518 for fewer sourcing channels, the PCI-6512 for 64 sourcing outputs or the PCI-6511 for input-only monitoring.
Why Choose the PCI-6514?
- Combines 32 industrial inputs and 32 sourcing outputs
- Supports both sinking and sourcing input signals
- Interfaces with industrial signals up to 30 VDC
- Provides eight isolated banks for flexible field wiring
- Supports programmable input filtering
- Offers configurable output power-up states
- Includes digital watchdog protection
- Provides self-resetting output-port protection
- Integrates with NI-DAQmx applications
Frequently Asked Questions
What is the PCI-6514?
The PCI-6514 is a 64-channel bank-isolated PCI digital I/O device with 32 industrial digital inputs and 32 sourcing digital outputs.
What is the PCI-6514 part number?
The standard NI part number for the PCI-6514 is 778836-01.
How many isolated banks does the PCI-6514 provide?
The device provides eight banks of eight lines. Four banks contain the 32 inputs, and four banks contain the 32 outputs.
Are the PCI-6514 inputs sinking or sourcing?
The isolated inputs support both sinking and sourcing field signals when connected using the appropriate bank reference and field wiring.
What type of outputs does the PCI-6514 use?
The PCI-6514 uses sourcing outputs. An active output supplies positive current from an external field supply to the connected load.
Does the PCI-6514 provide its own 24 V output power?
No. The sourcing-output banks require an external field power supply. The PCI-6514 switches the external supply voltage to the load.
What is the maximum output current?
One output line per port can source up to 350 mA under applicable temperature conditions. When all eight lines operate simultaneously, the permissible current per line is lower and must follow the specified temperature-derating limits.
What is the maximum signal voltage?
The maximum supported industrial signal and output switching voltage is 30 VDC.
Does the PCI-6514 support input filtering?
Yes. Programmable digital filters can reject short pulses caused by contact bounce and electrical noise.
Does the PCI-6514 include a watchdog?
Yes. Its programmable watchdog can place selected outputs in predefined safe states if software communication fails.
Which connector does the PCI-6514 use?
The device uses a 100-pin keyed female SCSI front-panel connector.
Which software controls the PCI-6514?
The PCI-6514 is supported by NI-DAQmx and can be used with LabVIEW, LabWindows/CVI, C/C++ and compatible .NET environments.
Request a Quote for the PCI-6514
Contact us for current availability, lead time and project pricing for the PCI-6514 64-Channel Bank-Isolated Digital I/O Device. We can also help identify compatible 100-pin cables, connector blocks and alternative sourcing or sinking industrial digital I/O devices.
