3108 - 8-Channel Serial Relay Controller Isolated I/O Board
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Front View
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Rear View
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Internal View
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Software Interface
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General purpose RS232 serial port IO controller board featuring 8 relay outputs
and 4 opto-isolated inputs for use in a wide variety of control and sensing applications including
load switching, external switch input sensing, contact closure and external
voltage sensing.
Eight relay outputs (can be increased to 16 if you use two 3108 units and
our upgrade kit Order Code 3108U). Each relay is capable
of switching 5 amps, 250V max (see
Relay Data Sheet).
Four 5-24Vdc opto-isolated digital inputs.
Housed in a high quality plastic enclosure with detachable screw terminal
block connectors for all IO connections.
Can be controlled using simple ASCII text based serial protocol or our free
Windows 3.1/95/98/ME/W2K/XP software (details below).
All components provided
including a high quality case with pre-punched and silk screened front and rear panels
to give the kit a professional and attractive finish as shown in the photos.
High quality DS PTH PCB.
| Technical Specifications |
| Power |
Regulated 12Vdc (Order Code
PSU445 is
suitable) |
| Current Consumption |
400mA max (50mA standby plus ~30mA per active relay) |
| Outputs |
8 x SPDT Relays |
| Output Load |
5 Amps @ 250Vac max. per relay (Relay
Datasheet) |
| Relay Connections |
C, NO, NC (Relay
FAQ) |
| Inputs |
4 x 5-24Vdc opto-isolated digital inputs |
| Computer Interface |
Serial port |
| Dimensions |
~ 140W x 110D x 35H mm |
| Connections |
Power: 5.5 x 2.5mm DC socket
Relays: 8 x 3-way pluggable screw terminal blocks
Inputs: 4 x 2-way pluggable screw terminal blocks
Computer: Male DB25 connector |
| Product Format |
Kit Form (KT
 )
or Assembled (AS)
more |
| Documentation |
 User
Manual |
| Software |
 Windows Software Interface
Free Terminal Program |
Software
New easy-to-use Windows program (see the picture above) that runs on all
versions of Windows from 95 to XP is now available, making this controller easy
for even a novice user to use. You can set the inputs and output in real time
with ease. Download the software by clicking
here.
Alternatively, user written batch file programs can easily be made to control
the kit using simple text commands. See documentation for examples.
This unit can be used with ANY computer and operating system. NO special
software is required other than a terminal emulator program (built into Windows
3.1 onwards as Terminal or HyperTerminal). Or use our
free
Terminal program.
Additional Items Required
- Power Supply: 12V, 500mA min. DC Power Supply (Order Code
PSU445)
- M-F Serial Port Lead (Order Code LDC441)
