Greetings

Im trying to set up a light to go on when the voltage drops bellow 50% which in my case will be 48.5V

I have used the Ports C & NC that will allow the circuit to close when the voltage is higher than the point back to utility or in floating mode just to test if it will work, but im not getting any signals from the dry contacts 

please advise 

 

My power source set to Utility which will work the same as if its SBU or Solar when the battery Battery is fully 

my battery is in floating stage and multimeter shows nothing 

I use the contact NC & C to switch a relay . Program 1 is set Sol . Our setup is offgrid . I use program 12 set 50 v to switch the relay off and 13 set to 51v to switch relay on . If you use the NO & C contact you can set 12 to switch on the light and 13 to switch off . Settings 12 and 13 can only adjust in full volts . You can also use program 1 Utility and set on low DC warning .

Thanks @Chris Louwfor the answer 

before i connect the light i wanted to make sure there is power coming from the relay to power up the bulb, but it seems it is not working 

Im testing it to use it in an off grid system by my uncle, the light will switches on when the voltage drops to setting 12 (low voltage) and i will do the same in my house...

I have connected one wire to C and other one to NC which will close the circuit when the voltage is high wether program 1 is set to utility or solar, and i test the voltage with multimeter and it shows nothing just 0.00

Any idea why it is not working for me ?

4 hours ago, Amine said:

Any idea why it is not working for me ?

It's a pair of contacts; there is no power behind it. You have to provide power externally. NC stands for Normally Closed. Try your multimeter on the resistance (Ω) range.

@Amine you must connect a power supply , the dry contact is just a switch . I use a 12 v power supply and a 1A fuse .

Thank you for replying @Coulomb and @Chris Louw

I feel so dumb now, this is why they are called dry contact they are like switches, i honestly thought i will get a small amount of power from it to trigger the light...

what is the maximum power (V and A ) supply that i can run through it ????

Thanks again for your time i really appreciate it.

3A /250 VAC .

@Chris Louw
Yes that's what it shows in the manual user, i just want to double check when you said you are using a 12V power supply.

So i can use the wall outlet in the house like im using phone charger.. !!!

 

 

I use the 12 v because it also power some cooling fans . Just keep it within recommended range .

Hello Im trying to use the dry contact port NO&c on the inverter but I'm not having any response only on the NC&O the ohms meter is having a signal. 

Any advise please 

 

@Bahaa As Chris Louw's first post on 19 July 2020 shows in the picture, the contacts are simply switched contacts (normal condition: connects N and NC, switched condition: connects N and NO) which are operated when certain criteria are met. Since this only provides the switch, you need to provide the rest of your circuit (from power supply, wiring, appliance, protection measures, etc.), and connect across N - NO and/or N- NC, depending upon which connection you need to operate your appliance.

As with any switch, you'll measure 0 Ohms resistance across the Normally Closed switch in its default (Normal) state, and infinite Ohms across the N - NO side. Once the switch criteria are satisfied, the switch will operate and you'll measure 0 Ohms (direct contact between) on N - NO, and infinite resistance (open circuit) across the N - NC side of the switch.

Just be sure to size the power supply and load to keep within the specified limits of your inverter.

hi

What is the rated power supply for dry contacts

The contacts are just switches, there is no power behind them.

They can switch small currents, as per the specifications. Typically 3A @ 250 VAC.

On 2020/07/19 at 11:48 AM, Amine said:

Thank you for replying @Coulomb and @Chris Louw

I feel so dumb now, this is why they are called dry contact they are like switches, i honestly thought i will get a small amount of power from it to trigger the light...

what is the maximum power (V and A ) supply that i can run through it ????

Thanks again for your time i really appreciate it.

Hi Amine,

I have a Axpert Max II 1-phase 10KW inverter, and want to connect a generator to my dry contact switch NC and C.

i just want to know how to connect the 2 wites from my generator to the inverter?

eventually with a drawing.

thanks in advance

7 hours ago, JohnBee said:

i just want to know how to connect the 2 wires from my generator to the inverter?

It all depends on what your generator wants. I would expect that it just wants a switch to close when the generator should start and run. In that case, the NO (Normally Open) and C (Common) contacts would be used.

Can i use dry contact to switch on my generator when my batteries are too low?

18 hours ago, siphelele said:

Can i use dry contact to switch on my generator when my batteries are too low?

Yes, I think that's the primary use for them.

18 hours ago, siphelele said:

Can i use dry contact to switch on my generator when my batteries are too low?

Yes bear in mind the normally open contact will stay closed right up to the point of going back to battery.

I use mine as an light alarm that the battery is getting low. It also gets triggered when a high load is switched on causing the battery to drop to the alarm level.

Just to add to all of these good posts. The Dry contact signal only operates when the (04) warning comes on. That is the low battery voltage warning as present in one of the 20 something options I think option 27 I think . 

It makes a lot of logical sense that when the battery is about to run flat that it send sthe signal to start the generator. So in all of your testing makes sure that you set a high voltage in the menu setting I have mentioned above that controls the battery cut off voltage. At approximately 1V of this voltage threshold the warning is triggered. 

On 2022/12/05 at 3:51 PM, Steve87 said:

At approximately 1V of this voltage threshold the warning is triggered. 

2.0 V in unpatched firmware. [ Edit: Half that for 24 V models, quarter that for 12 V models. ]

FAQ #1

Edited December 6, 20223 yr by Coulomb

Thanks for once again mentioning the 1V or 2V threshold. I have to say I have never bothered to check at what level it is as it works fine as an indicator. It seems to switch state earlier that what the alarm 04 is switched off. Also not really looked to which setting both are linked.

In my case I think in about a year of use(since getting the S-100 batteries) my inverter only switched off about 5 times which I am happy with seeing that it is only a small 3kVA clone.

Edit: I got curious as to the levels on my inverted.

During and after our 2nd LS this evening I looked at the actual levels. Dry contact switch on (25V) and alarm04 at BACK TO GRID LEVEL. During charging the contact switched to open at BACK TO Battery (25.5V) which is 0.5V higher. Then alarm04 goes away at 1V above back to grid(26V). My cut out is set at 24V. Thus alarm04 goes away 2V higher than cut out.

Edited December 5, 20223 yr by Scorp007

20 hours ago, Scorp007 said:

Thus alarm04 goes away 2V higher than cut out.

I forgot to mention that the 2.0 V is for 48 V models. It's half that for 24 V models.

Yes, battery low goes away at 4.0 V above the cut-off voltage setting on 48 V models, so it would be 2.0 V for 24 V models.

There are dry contact outputs on the inverter. When the voltage drops to 50, a signal is given via NO-C terminals. We need to transmit the signal given by the inverter with 2 cables to the generator with a single cable, how can we do this? without using relay. 

23 hours ago, Raimon said:

We need to transmit the signal given by the inverter with 2 cables to the generator with a single cable,

I would think that the generator start signal would need two wires, even if bundled into one cable. These wires would connect to the NO and C terminals of the inverter's dry contact terminal block.

Perhaps tell us the generator model, or post a picture of the remote start cable from the generator.

23 hours ago, Raimon said:

without using relay.

Depending on the generator, a power supply and relay may be needed.