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July 2025
NI-9870E Request for Availability
NI-9870E, 4-Port, RS-232 Serial Module
Rated 4.6/5 | 10 ratings
Actual item may vary if no part number is provided on quote request.
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Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
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January 2025
Carol Zimme**** Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
National Instruments NI-9870E RS-232 Serial Module
The NI 9870E Serial Module has four individual RS232 DTE ports that are separated from the other modules in the system. All ports are completely compatible with the ANSI/EIA/TIA-232 requirements. For connections, there are four RJ-50 receptacles that can be linked to four RS-232 instruments. The user can utilize a cable that modifies the RJ-50 pinout to the regular National Instruments pinout on a DB-9 male connector. This pinout can be referenced in the user manual for the NI-9870E.
An external power supply should be joined to this National Instruments RS-232 Serial Module. The power supply delivers the power for the RS-232 transceivers on the NI 9870E Serial Module. The user can utilize a four-position pigtail to link to an external voltage foundation. The connections between an external voltage foundation of +8 V to +28 V and the module include: VSUP, a second VSUP, COM, and another COM connection.
An optional y-adapter can additionally be utilized with the NI-9870E. With the y-adapter, the user can link power to several modules at once with one power source. A single y-adapter is required for every module added. The user should make sure that the power supply can withstand the highest power requirements for every connected module. Also, the user should keep in mind that connections should all be completed prior to applying power. The NI 9870E RS-232 Serial Module supports a low-power sleep mode. However, this mode is only supported at the system level for certain chassis.
| Model | NI-9870E |
|---|---|
| Manufacturer | National Instruments |
| Type | RS-232 Serial Module |
| Ports | 4 |
| Connectors | RJ-50 |
| Maximum Cable Length | 250 pF equivalent |
| Weight | 1.9 oz. |
| Warranty | 2-3 Year Warranty |
| NI-9870E Manual | User Manual and Maintenance Manual Available for Download |
| Price | Contact a sales representative for a quote. |
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National Instruments NI-9870E Frequently Asked Questions
Question: What is the maximum baud rate of the NI-9870E?
Answer: The maximum baud rate of the NI-9870E is 921.6 kbps.
Question: What are the power requirements of the NI 9870E?
Answer: The NI 9870E consumes 0.5 W maximum in active mode and 50 μW in sleep mode.
Question: What is the necessary external supply voltage range for the NI-9870E?
Answer: The necessary external supply voltage range for the NI-9870E is +8 to +28 VDC.
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