Description
The NI 9481 model, part number 198863A-02L, falls under the C Series Digital I/O category, designed specifically for applications requiring high-quality digital I/O solutions. This model is an OEM board that features 4 single-pole single-throw (SPST) relays, providing versatile switching capabilities.
The NI 9481 is capable of handling a variety of voltages and currents, with a switching capacity of up to 30 VDC at 2 A, 60 VDC at 1 A, and 250 VAC at 2 A maximum. This wide range allows for flexibility in connecting and controlling a variety of devices.
Each of the four channels on the NI 9481 comes with 2 interchangeable terminals (CHa and CHb), enhancing the ease of use and adaptability of the device. Furthermore, the module features an LED indicator for each channel, providing immediate visual feedback on the channel status.
Designed for compatibility with NI CompactDAQ or CompactRIO Chassis, the NI 9481 seamlessly integrates into existing setups, offering a straightforward solution for expanding or enhancing system capabilities.
For wiring, it is recommended to use 2-wire ferrules for multiple wires per terminal to ensure a secure and reliable connection. Additionally, for environments subject to extreme vibration, the use of an NI-9932 backshell kit is advised, offering additional protection and stability for connections.
| Specification | Detail |
|---|---|
| Part Number | 198863A-02L |
| Category | C Series Digital I/O |
| Model | NI-9481 |
| Description | NI 9481 4 ch 30 V, 60 V,250 VAC EM Form A SPST Relay, OEM Board Only |
| Channels | 4, Single-Pole Single Throw (SPST) Relays |
| Compatibility | NI CompactDAQ or CompactRIO Chassis |
| Switching Capacity | 30 VDC (2 A), 60 VDC (1 A), 250 VAC (2 A) maximum |
| Terminals per Channel | 2 interchangeable (CHa and CHb) |
| LED Indicator | Yes, indicates channel status |
| Recommendations for Wiring | Use 2-wire ferrules for multiple wires per terminal; consider NI-9932 backshell kit for extreme vibration environments |
Question 1: What is the part number for the NI 9481?
Answer 1: 198863A-02L
Question 2: How many SPST relays does the NI 9481 have?
Answer 2: 4
Question 3: What is the max VAC the NI 9481 can switch?
Answer 3: 250 VAC
Question 4: Is the NI 9481 compatible with NI CompactDAQ?
Answer 4: Yes
Question 5: What should be used for wiring multiple wires per terminal?
Answer 5: 2-wire ferrules


