Description
The NI 9421 model comes with part numbers 779002-01, 779136-01, 779136-02, and 783734-01. It falls under the category of C Series Digital I/O. This module is specifically designed as a NI 9421 DSUB, featuring 24 V, 100 µs, 8-channel sinking DI module. With its digital input channels totaling 8, it supports a sinking input type.
The logic levels that the NI 9421 operates at are 12V and 24V. Channel-Earth ground isolation varies with part numbers; for 779136-01 and 779136-02, it stands at 60 VDC, while for 779002-01 and 783734-01, it reaches up to 250 Vrms. An important feature of the 779136-02 model is its conformal coated design, enhancing its durability and reliability in various environments.
When it comes to power consumption, the module remains efficient with up to 240 mW during active use and drops significantly to up to 7 mW in sleep mode. Additionally, there’s an LED indicator provided to signal the condition of each channel. The weight of the module is light, recorded at 5.1 oz, making it easy to handle and integrate. For operational flexibility, the NI 9421 is designed to function within an operating temperature range of -40 °C to 70 °C and has a storage temperature range that extends to -40 °C to 85 °C.
| Specification | Detail |
|---|---|
| Part Numbers | 779002-01, 779136-01, 779136-02, 783734-01 |
| Category | C Series Digital I/O |
| Model | NI-9421 |
| Description | NI 9421 DSUB, 24 V, 100 µs, 8-Ch Sinking DI Module |
| Digital Input Channels | 8 |
| Input Type | Sinking |
| Logic Levels | 12V, 24 V |
| Channel-Earth Ground Isolation | 60 VDC (779136-01, 779136-02), 250 Vrms (779002-01, 783734-01) |
| Conformal Coated | Yes (779136-02 only) |
| Power Consumption | Active: up to 240 mW, Sleep mode: up to 7 mW |
| LED Indicator | Yes, for channel condition |
| Weight | 5.1 oz |
| Operating Temperature Range | -40 °C to 70 °C |
| Storage Temperature Range | -40 °C to 85 °
Question 1: What are the logic levels of the NI-9421? Question 2: How many sinking DI channels does the NI-9421 have? Question 3: What is the power consumption of the NI-9421 in sleep mode? Question 4: Does the NI-9421 have channel-earth ground isolation? Question 5: What is the operating temperature range of the NI-9421? |
