Made in USA Flag All board products Proudly made in USA!

Manufacturer of computer controlled relay, I/O and custom boards for commercial and industrial applications.

Please Note: Pencom will be closed from September 12th thru September 23 - we will re-open on September 26

** Please note supply chain shortage update 09-07-2022 -  a limited supply of the backordered parts will be arriving around September 28th for the USB boards - more parts are on order:   We have many backordered boards that will be produced first - notifications will go out to customers to verify the orders are still valid.

There will be production delays due the volume of the backorders

Due to the supply chain shortages we have been having a difficult time obtaining parts to produce our products.  Some of our parts have been on order for 12 months  Some parts are being received for certain products and we will do our best to fulfill what we can.

In addition we have been experiencing problems with our email system and many emails were never received on the following accounts our and, this has been happening for some time and we were unaware since it is happening sporadically. 

We have created two new accounts to use until we can determine the problems we are having with our system and please use these emails to contact us.

Other email address have been the same problems and we will work to correct these too.

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8 Channel

Relay boards with 8 channels (8 relays on the board)

Designed for single board operation or multiple board operation on the same USB port - this is accomplished by adding our 8 channel RS232 boards in a daisy chain configuration.  Up to 15 RS232 boards can be connected to the first USB board in this daisy chain configuration - allowing up to a total of 128 relays under PC control on each USB port. Each additional RS232 requires one  modular cable to connect to the next board. 

Each board has a board address when used in multiple board applications (daisy chained).  DIP switches are used to uniquely identify each board - since all the boards are connected to the same USB channel, the host computer needs to communicate to each board - without talking to the other boards on the same channel. Every board must be set to a different address to operate correctly.