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Time delay relays for your information

 Relay number one is a single function relay, obtained from AMAZON , which after a pulse is withdrawn, shuts off current to the accessory after the delay as per the settings. The instructions are not that complex, but without knowing anything they are daunting. Perhaps this explanation of the settings will help.

On the left side of the board are two terminals, marked VCC & GND. These are the power connections for the circuit. They have nothing to do with the device you are trying to control. VCC is +12 VDC & GND is ground, or (+) & (-) respectively.

Below these terminals and above the POWER LED (red) are 2 pins. These are the pins for a momentary switch. Basically, when you short these pins, the relay activates. When you disconnect them (release the momentary switch) the timer will keep the relay switched until the specified time runs out, and then it unswitches the relay.

Once you short these two pins, the TIME LED (green) comes on, and will stay on until un-shorted or time runs out.

The right hand side of the component has the terminals for the ouput. The middle terminal is the common source. The top is normally closed. The bottom is normally open. What this means is that to complete your circuit, you connect source end to the common, and if you want the relay to turn off your circuit for a specified time (and when time runs out turn it back on), you connect it to the top one (NC). If you want the relay to turn on your circuit for a specified time (and then shut it off), you connect the other lead to the bottom terminal (NO).

How to set the time delay? There are 4 jumpers on the component. Labeled S1-S5 (there is no S3). Ignore S5 for now. There is also TIME-ADJ potentiometer at the bottom of the component, just to the right of the TIME LED.

S1 & S2 are located at the top of the component and can be shifted from the "1" side to the "0" side. This equates to S1=0 or S1=1 & S2=0 or S2=1. Finally there is S4, which can be connected or not connected.

The 4 possible combinations of S1 & S2 set your possible maximum and minimum time delay. The delay is adjusted from minimum to maximum by turning the TIME-ADJ knob from left to right. All the way counterclockwise is the least amount of time delay, all the way clockwise is the most amount of time delay. S4, when connected will multiply the ranges by about 10.

So if: S1=0 & S2=1 & S4 is not connected (S4N), then the TIME-ADJ knob will set the delay from 0.13 seconds to 1.3 seconds. S1=0 & S2=1 & S4 is connected (S4C) then the TIME-ADJ knob will set the delay from 1.5 seconds to 14.5 seconds.

I hope that makes sense, because here are the all ranges.

S1=0 & S2=1 & S4N > 0.13s - 1.3s S1=0 & S2=1 & S4C --> 1.5s - 14.5s
S1=1 & S2=0 & S4N > 0.5s - 5.2s S1=1 & S2=0 & S4C --> 6s - 58s
S1=0 & S2=0 & S4N > 4.4s - 42s S1=0 & S2=0 & S4C --> 48s - 463s (7m 43s)
S1=1 & S2=1 & S4N > 38s -340s(5m 40s) S1=1 & S2=1 & S4C --> 389s (6m 29s) - 3700s (61m 40s)

Finally, as for S5: when the pins for S5 are connected, it connects the input voltage from VCC and connects it to the COM input on the relay. If this works out for you, it can save you a bit of wiring. I did not trust that circuit board trace and ran a wire from my +12v feed of VCC to the COM terminal. 

Above you can see that I added another relay  Radio Shack 257-241 , mounted upside down to the unit to mimic the closing of the two pin activator. When I pulse the added relay with the horn +12v, it closes the pins mimicking a momentary switch as per the instructions above. I hot glued that relay and all the wires in place once I had the connections finalized.


Relay number two is a multi-function relay with many options.  Git one on eBay. It can delay the turn on, the turn off, both or cycle through timed off and on sequences as desired. I use this to run my strobes for a set time, turn them off for a set time then turn them on again. This lets me strobe to my heart's content at bike night without taxing the battery too much. It has many settings as well and I will attempt to show you how to set them.

These are the power connections for the circuit. They are separate from the device you are trying to control. DC+ is +12V DC & DC- is ground. CH1 must be pulsed with +12V DC to set your sequence in action. The sequence begins when CH1 loses power after getting power. COM is the power you wish to feed the NO & NC terminals. NC is connected to COM and NO is not if the relay is not tripped. NO is connected to COM if the relay is tripped (NC loses connection in that case).

Power the circuit. Tap SET button to turn on the display then press and hold SET until the rightmost number blinks. Now you can set the functions and values.

The blue LEDs to the right of the numbers inform you of what function you are setting (MODE, T1, T2, NX). To move to the function desired, tap the SET button. To move to the digit desired, tap the SWI button. Use the NUM+ & NUM- to set the blinking number to the desired quantity. When done, press and hold SET to save and start the sequence.

There are eighteen (18) MODEs (that I know of) detailed below. Set your mode first. Then Tap the SET button to move to T1, which is the counter for timer one, enter the value you want. Tap SET again to get to T2 which is the counter for timer two, enter the value wanted.

Tap SET to get to NX which has two functions: A) enter 0000-9999 for the number of times Modes 7 & 8 will repeat before they stop. Each of the timecounts in Modes 7 & 8 are always one second for T1 and one second for T2. B) For modes 1 through 6, NX is the number of seconds between each count of T1 and T2. T1 is designated with the left two digits, T2 designated with the right two digits. This means, if you have them set for 0101, each count of T1 and T2 will be 01 second.  

SEC_EACH T1 T2

If you set NX higher, the count will be that many seconds for each count of T1 and T2. For example: set NX as 0204, the T1 timer will count 02 seconds for each count and the T2 timer will count 04 seconds for each count. At NX 0204 with T1 set at 4 T1 will count down for 4x2=8 seconds. At NX 0204 with T2 set at 4 T2 will count down 4x4=16 seconds.

When done, press and hold SET to save settings and start the sequence. The module will remember the settings through power down and will start the sequence at power up.

NX  0204 02 04
NX   0101 01 01

Below are the mode behaviours for the relay. We will describe what happens at the Normally Open (NO) terminal. If you use the NC terminal, each of these will be reversed. The sequence starts at every power up and restarts if CH1 is pulsed with voltage.

MODES
1: Open for T1 count - closes. A CH1 Pulse restarts.
2: Closed for T1 count - opens. A CH1 Pulse restarts.
3: Open for T1 - closed for T2 - opens. A CH1 Pulse restarts.
4: Closed for T1 - open for T2 - closes. A CH1 Pulse restarts.
5: Open for T1 - closed for T2 in an infinite loop. A pulse will simply restart at T1 and the loop will continue.
6: Closed for T1 - open for T2 in an infinite loop. A pulse will simply restart at T1 and the loop will continue.
7: Open for T1 - closed for T2 for NX loops then open. A CH1 Pulse restarts setting the NX counter to zero.
8: Closed for T1 - open for T2 for NX loops then open. A CH1 Pulse restarts setting the NX counter to zero.
9: Just a latching relay starting Open. A CH1 pulse closes. Each pulse changes state open - closed - open - closed .....
10: simple trigger relay closed when CH1 is hot.
11 thru 18 are the same as 1 thru 8 but it does not activate upon power up,
 only when CH1 gets a pulse do the sequences begin.

Hope this helps. There is very little out there for these two relays and their settings.

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