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Serial Modem Interface (PLM)

Serial Modem Interface (PLM)


Regular price $79.95
Regular price Sale price $79.95

Shipping & Returns


Shipping costs are calculated based on location and are available when checking out.

Orders placed with FedEx Intl Priority, FedEx 2 Day, or FedEx Overnight by 10am PT (Monday-Friday, non-holiday) are expected to ship same day.  Orders placed after 10am PT are expected to ship the following business day. All other orders are expected to ship within 2 business days

Customers shipping to Canada will be responsible for all duties and import fees which will be due upon receipt.

Returns & Exchanges

New Products

New items have a 30-day return window and are warrantied for 2 years from the purchase date.

Refurbished Products

Refurbished items are guaranteed to be in good working condition but may have physical imperfections and/or may not include original packaging and documentation. If the product fails to work, you may exchange it for like product within 30 days of receipt.

Clearance Products

Clearance items are sold as-is and do not carry a warranty.

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Customer Reviews

Based on 6 reviews
Scott T. (Colorado Springs, US)
Shipped quickly and packed securely.

This is a backup to an existing interface. Have not installed yet. Run Homeseer on Linux. House has 80 plus Insteon devices, with Google Assistant integration for voice control.

Jeff H.
Absolute ****

Ship products that don't work. Replaced 2 in 4 years. Absolute garbage.

Hi Jeff, we're very sorry to hear that you've had a bad experience with the Insteon PLMs. Was the failure from your recent purchase in July? If so, we would very much like to get more details from you and review the failed unit since there have been component improvements in the newer units we are selling.

If this review is for a unit purchased before the new owners took over in June '22, we would very much appreciate if you would reconsider the low rating and give the replacement PLM some time to prove itself as an improvement over the older, more failure-prone units. If not, we completely understand.

Thank you.

Scott B. (Charlotte, US)
So Far So Good

Last one lasted two years, hopefully this one goes a bit longer.

Blake (Brentwood, US)

My old PLM broke after a few years of use. I converted to Zwave due to no PLM avalable at the time. But I wanted to use my mini remotes so I needed the PLM (I am using an ISY 994 ) so I will still be able to use my old insteon devices.

Michael S. (Prospect, US)
Finally available !

I was worried about the future of my system without the PLM being available. So glad to see it's back in stock. I replaced a "recapped" PLM that was 5 years old and failed a second time. The new upgraded PLM was installed and had no issues once loaded with a good backup. I now have two failed recapped PLM's if anyone is interested in repairing them.