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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 sales@pencomdesign.com and orders@pencomdesign.com, 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 sales2@pencomdesign.com and orders2@pencomdesign.com please use these emails to contact us.

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

1 Channel RS232 Relay Board w/240V Power

Note this unit is a 240VAC 50/60Hz powered unit

 
$55.95
Production is typically 1 week for the RoHs units
S1-RLY-INT-2
Typically a 2-3 Day Production <10pcs
+ −
Our quantity discounts:
Quantity 5+ 25+
Price $53.15 $50.36
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Low cost 1 channel serial relay board controlled through one of the RS232 serial ports, 10 Amp 250VAC/28VDC SPDT power/general purpose relay - with an on-board 240VAC 50/60Hz power transformer. (NO enclosure available).

Includes 9-pin RS232 to modular cable adapter & 7' Modular cable

  • ASCII commands to control relays.
  • Easy hook up using standard modular telephone cable.
  • Any software language that can write to the PC serial port can be used with this relay board NO special drivers needed.
  • 4800-38400 baud (default 9600 baud)
  • LED Indicators for relays included

Compatible Accessories & Components

 

The information below describes the power options, (this is the voltage that powers the board itself - not the voltage/current the relays can handle).

Choose the option that best suits your application.  Some options are available only on specific boards, and it depends on the type of control and the relay options for that board.

AC Wall Adapter - wall power supply that converts the AC voltage to DC to power the unit, the cable plugs into the unit with a DC power connector.

DC Terminal Block - Typically used when a regulated DC power supply with sufficient capability is already available where the unit will mount, or to power a daisy chained string of boards.  Includes reverse voltage protection to prevent damage to the board if the power leads were installed backwards.  Most of our boards will operate on 9-12VDC.

120V 50/60Hz - This has an on-board power supply that will operate directly off the 120VAC line voltage.  The line voltage connects to a three position terminal block on the board that is marked with L1 (Line 1 -typically black), N/L2 (Neutral wire - typically white) and GND (Electrical ground - typically green or bare).  Common practice is to add an inline fuse for safety.

240V 50/60Hz - This has an on-board power supply that will operate directly off the 240VAC line voltage.  The line voltage connects to a three position terminal block on the board that is marked with L1 (Line 1 -typically black), N/L2 (L2 - typically red, but could be another color) and GND (Electrical ground - typically green or bare).  Common practice is to add an inline fuse for safety.

Bus Power Option - This power option is only for USB boards with the Reed relays installed and specific I/O boards.  The board is powered by the USB port and must be a high power port or USB port from a powered hub with a 500mA output. 

Note: USB devices are also required to automatically enter ultra low-power suspend mode when the USB host is suspended, and this may turn off the power to the board and all relays will turn off that were active.  Nevertheless, many USB host interfaces do not cut off the power supply to USB devices when they are suspended, it depends on the host controller.  If this is a problem for your application use the USB boards that are powered by an AC adapter or DC terminal block power versions - these will not turn off the relays once set by a command (unless the power is disconnected from the board).