Hometech Computer Interface Module UMC Leaflet

Simply Automated, Incorporated 

5825 Avenida Encinas, Suite 101, Carlsbad, CA  92008 USA 

Technical Support:  www.simply-automated.com or 800-630-9234 

 452-0004-0001 Rev. A    Revised: December 23, 2005 

The Computer Interface Module, model UMC, is used to 
exchange digital commands between a PC (personal computer) 
or server/gateway and UPB (Universal Powerline Bus) devices in 
the home. The module communicates these commands over the 
AC power wiring.  The following model is available: 
 

UMC-DB9:  Serial RS-232 interface, DB9 connector 

 
UPB devices can be freely located anywhere in the home.  No 
additional wiring is required and no radio frequency signals are 
used. 

When using electrical products, basic safety precautions should 
always be followed, including the following: 

1.  READ AND FOLLOW ALL SAFETY INSTRUCTIONS. 
2.  Keep away from water.  If product comes into contact with 

water or other liquid, unplug immediately. 

3.  Never use products that have been dropped or damaged. 
4.  Do not use this product outdoors. 
5.  Do not use this product for other than its intended use. 
6.  To avoid risk of fire, burns, personal injury and electric shock, 

install this product out of reach of small children.  

7.  Do not cover the product with cloth, paper or any material 

when in use. 

8.  This product uses polarized plugs and sockets (one blade is 

wider than the other) as a feature to reduce the risk of 
electric shock.  These plugs and sockets fit only one way.  If 
they do not fit, contact a qualified technician.  Do not use with 
an extension cord unless plugs can be fully inserted.  Do not 
alter or replace plugs. 

9. SAVE 

THESE 

INSTRUCTIONS. 

The Computer Interface Module is designed for indoor use.  

1.  Plug the Computer Interface Module into a 120-volt outlet 

near the computer or server (see illustration).  

2.  Connect the supplied interface cable to the socket on the 

bottom of the module.  Connect the other end of this cable to 
the appropriate data port on the computer or controller. 

3.  If desired, any electrical device can be plugged into the 

socket on the front of the module, which is always powered. 

 
 
 
 
 
 

The Computer Interface Module exchanges UPB messages 
between the powerline and the connected computer or controller.  
The indicator on the module will glow AMBER when powered and 
flash RED during messaging. 
 
The interface has two operating modes: MESSAGE mode and 
PULSE mode.  The last-used operational mode is retained during 
power interruption.  UPStart software automatically sets the 
interface to PULSE mode operation, but most controllers require 
MESSAGE mode.  To restore MESSAGE mode operation… 

1.  Place the UMC in SETUP mode by pressing the Program 

Switch (located just above the indicator) five times rapidly 
using a non-metallic toothpick.  The indicator will 
continuously blink RED.   

2.  Reset to MESSAGE mode by pressing the Program Switch 

ten times.  The indicator will continuously blink GREEN.   

3.  Press the Program Switch twice to exit SETUP mode. 

CAUTION:  Do not insert metal objects into the module 
while it is connected to power.