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SM136  Universal 3- Channel timer Module


GENERAL DESCRIPTION
The SM136 is a software controlled Three Channel Timer module with three independently working timer circuits.  Each timer circuit has an optically isolated Input Trigger, a Timer Adjustment control knob, a Timer Scale option strap and a 30 Amp output relay.    It requires a 12V D.C. power supply to operate.

INPUT TRIGGER 
The input trigger has an opto-coupled input, which means that the triggering signal can be from any  voltage source 10 to 50V dc, whether or not that source has a common ground with the 12 power supply rail that powers the module. 

This input is negative edge triggered which means that a 10 to 50V input must be applied all the time between the COM terminal and the T1,T2 or T3 terminals on the input to the module.  If the trigger signal voltage is interrupted for longer than 0.1 of a second on any of the three channels, then that input will be triggered.  (this 0.1 delay is to prevent noise spikes from nuisance-triggering)

Once triggered, the corresponding output relay will operate for the preset time period for that channel and then release.  Note that while the output relay is operated as soon as the input trigger signal is removed, the time delay to release the relay commences from the time that the positive signal has been restored to the trigger input.

For example:
  • The time delay has been pre-set for 10 seconds by the time delay adjustment knob.   
  • The trigger voltage applied to an input is REMOVED
  • (The corresponding relay operates 0.1 of a second later)
  • FIVE seconds later the trigger voltage is RESTORED to the input by the user
  • TEN seconds later the relay will release.

TIMER ADJUSTMENT KNOB & TIMER SCALE OPTION
  Each timer channel has an adjustment knob to select a time delay between 0 to 25 seconds or 0 to 255 seconds (which is 4min and 15 seconds) 

The delay is increased by turning the knob clockwise.  The choice of the two delay periods is selected by the TIMER SCALE link strap on the SM136 module, next to the IC chip. 
  • If the link is IN then 0-25 seconds has been selected. 
  • If the link is OUT then 0-255 seconds has been selected.

Note that if the value of ‘0’ has been selected by the adjustment delay knob, then the relay will fail to operate when the input is triggered.

OUTPUT RELAY 
The Output Relay for each of the three channels has a single changeover contact rated at a nominal 20Amps at 240VAC.  Both the Normally Open (N/O) and the Normally Closed (NC) contact is available at the screw terminal.

TEST CIRCUIT USING THREE PUSH-BUTTON SWITCHES 
(Note that the switches used here are Normally Closed, and go Open when pressed.)

Briefly pressing any of the three buttons will trigger an output relay for a time delay as preset by the jumpers and the timer potentiometer.
       
SPECIFICATIONS        
  •           AVAILABLE INDEPENDENT TIMERS                      3
  •           TIME DELAY RANGES                                                0 to 25 Seconds  or  0 to 4.25 minutes  (jumper selectable)
  •           SUPPLY VOLTAGE                                                12V D.C.
  •           TRIGGER VOLTAGE                                                    10-50 V D.C
  •           SWITCHING RELAY CURRENT                                 20A


Click on the link below to download this Product Information.
sm136_3_ch_timer.pdf
File Size: 99 kb
File Type: pdf
Download File
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PRICING INFORMATION   
  • Payment can be made to Alian Electronics via EFT or Pay Pal
  • All prices in $AUD and do not include the cost of freight.   (Click HERE to view the Freight Information page)
  • When buying from within Australia add 10% GST
  • (Overseas sales are GST Free, but depending upon local policy, you may need to pay tax/duty for goods to be released by your Customs)
  • When buying from within Australia by Pay Pal, add 2.4% for Pay Pal transaction fee.
  • When buying from Outside Australia by Pay Pal add 3.6% for Pay Pal transaction and currency conversion fee.
  • (When buying from Outside Australia using Telegraphic Transfer ( TT ) the buyer will pay transaction fees with their bank.)
  • Transaction details, Freight & other charges will be shown on a Proforma Invoice supplied to you before you pay.

        SM136  Timer Module
                        Qty 1-9        $120.00
                        Qty 10+       $  95.00
 
         (last updated March 2012)  
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