Vm141

Kits Timers and Clocks
1

I wonder which temp.range it can work in ?
How long can the startpuls be ?

2

Temp range: commercial (0…70°C)
There is no limit on the length of the start pulse.

3

Perhaps it must work below zero,is it possible ?

4

The processor is a commercial type, so correct operation below 0°C is not guaranteed.

5

Hallo again

Have a problem when an external relay is connected (the coil)
When time expired, starts new period of himself and so it continues ?
This does not happen if I connect a lamp ?

Best Regards
George

6

If the external relay is also dc operated: put a diode (like 1N4007) in the non-conductive direction over the coil (anti-parallel, ring, cathode to the +).

7

Yes it is a DC relay.
But what is really happening ?
Is it the magnetic field when the relay drops that disrupt startup components?

Best Regards

8

Difficult to tell what happens exactly.
Can you link to a diagram of your hook-up?
What kind of load did you connect to the external relay?

9

The external relay switch on a LED lamp 230V/7W

When that happens the starting impulse input is not connected

Think it is the inductive load when the coil releases that are the problem?

10

Did you connect wires to the VM141 inputs?
Does it behave in the same way when you disconnect any external switch from the VM141?
What power supply are you using to power the VM141?

11

I have an AC / DC converter 3A

There is only that connected to the input.

Otherwise it is a NO switch that I will use as a starting impulse
power supply

It only happens when I connect the relay output with an external relay coil (12V) to place the 230V AC to an LED lamp.

12

Can you test without the NO switch at the input?

Also: what do you mean by AC/DC converter? Do you mean a power supply, e.g. wall plug?

13

When it happens the starting impulse input is not connected.
Yes it´s an power supply.

14

Did you try adding a diode, as Laserguy suggested?