Durst 138s CLS 1000 and RH Designs Stop Clock

Marc Charvet · Feb 28, 2012

Hello,

I have a Durst 138 with CLS 1000 head. I bought yesterday a Zone Master II and probably it can not be connected with the Durst Digitim S 1000 timer. So, i'm looking for a RH Design Stop Clock. Unfortunately, I think Durst CLS 1000 has a power rating (1000w, 110V) too high to be supported by Stop Clock.

Does anyone know if it's possible to connect Zone Master II with the Durst timer, or RH Design Stop Clock with Durst 138 and CLS 1000?

Thanks in advance.

(Excuse my mistakes in English, it's a long time that I left school... )

fotch · Feb 28, 2012

Hello Marc and welcome to APUG. You could hook up a relay to keep the current from frying the timer.

ras351 · Feb 28, 2012

My L1000 with the CLS450 head and the TRA450 transformer has a special low current timer socket. This gets used to switch the enlarger lamp on/off but most of the current goes through a separate circuit (ie there are two mains power inputs to the transformer). Check to see if you have something like this and if so you can use the lower current rated timers.

Roger.

Marc Charvet · Feb 29, 2012

Thanks for your replies.

Hello fotch, have you an idea what kind of relay to use ?

Hello Roger, I must carefully study your suggestion. Also, anyone have electric circuit diagram of the Durst Digitim to study more precisely the connection possibilities ?

Thanks at all.

fotch · Feb 29, 2012

Marc Charvet said:
Thanks for your replies.

Hello fotch, have you an idea what kind of relay to use ?

...................Thanks at all.

OK, I would use a relay with a coil voltage that the Stop Clock outlet puts out. This would be line voltage. For example, in the USA, this would be 110 volts. In choosing the relay, I would also specify the relay contacts can handle the amperage or current needed. The 1000 watts would need around 10 amps but I would pick a relay that could handle 20 amps. The different cost would be minimal.

I would also want the relay to be a double pole so it could also handle 220 volts, even if not presently needed. This would also be little extra cost. So, when the Stop Clock sends voltage to energize the lamp, instead, it energizes the relay. When said relay is energized, the relay contacts allow the 1000 watt to go the enlarger.

If not familiar in basic electricity then contact an electrician. Hope this helps.

Marc Charvet · Feb 29, 2012

fotch said:
OK, I would use a relay with a coil voltage that the Stop Clock outlet puts out. This would be line voltage. For example, in the USA, this would be 110 volts. In choosing the relay, I would also specify the relay contacts can handle the amperage or current needed. The 1000 watts would need around 10 amps but I would pick a relay that could handle 20 amps. The different cost would be minimal.

I would also want the relay to be a double pole so it could also handle 220 volts, even if not presently needed. This would also be little extra cost. So, when the Stop Clock sends voltage to energize the lamp, instead, it energizes the relay. When said relay is energized, the relay contacts allow the 1000 watt to go the enlarger.

If not familiar in basic electricity then contact an electrician. Hope this helps.

Thank you very much, It is very clear !

By searching in my memory, by memories of old lessons electricity, I should be able to get there.

As soon as I receive my ZoneMaster, I study the question. If I succeed in realize the connection with Digitim timer, I'll give here details to who might be interested to do it.

And thank you again fotch !

R.Gould · Feb 29, 2012

Try contacting RH designs for an answer, I have always found Dr Ross, the owner of RH designs, to be extremly helpful, just Email them and you will get all the help possible, and that from the designers/makers of the equipment,always go the source as a mistake could get expensive
Richard

Marc Charvet · Feb 29, 2012

Hello Richard,

Im already in relationship with Mr. Ross of RH Designs who have already given me many explanations. He thinks it is not possible because ZoneMaster only interfaces to their own StopClock. Unfortunately, I think Durst CLS 1000 has a power rating (1000w, 110V) too high to be supported by their Stop Clock. When I wrote him, he suggested I ask the question on APUG for a possible solution.

R.Gould said:
...,always go the source as a mistake could get expensive

You're absolutely right ! That's why I will study very precisely the question before doing something. So, if anyone have electric circuit diagram of the Durst Digitim, i am very interested.

Marc

RH Designs · Feb 29, 2012

The ZoneMaster II will only connect to our StopClock timers but you can use it as a stand alone meter with any timer.

I'm fairly certain the high power Durst enlargers do have relays built in so that the timer doesn't need to handle the high currents in the lamp circuit, but we were hoping someone here would have the definitive answer!

Marc Charvet · Feb 29, 2012

RH Designs said:
I'm fairly certain the high power Durst enlargers do have relays built in so that the timer doesn't need to handle the high currents in the lamp circuit

If this is accurate, do you think your StopClock could then be connected to durst CLS 1000 ? I'll try to measure the intensity at the output of Digitim.

RH Designs · Feb 29, 2012

When you press the start or focus buttons on your timer, do you hear a click from the enlarger power supply? If so, that would be a relay. I can't find any specific information about the Digitim 1000 but from pictures it doesn't look like the sort of device that would handle high powers.

Does the power supply have its own mains power cable or does it connect only to the timer?

Marc Charvet · Feb 29, 2012

I found electric circuit diagram of the Durst CLS 1000 (see attachment). There's a relay in the head who switch the shutter. The lamp lights up immediately after the shutter opening. I look in greater detail the connections later and I post again.

ras351 · Feb 29, 2012

Marc Charvet said:
I found electric circuit diagram of the Durst CLS 1000 (see attachment). There's a relay in the head who switch the shutter. The lamp lights up immediately after the shutter opening. I look in greater detail the connections later and I post again.

You need to find a schematic for the transformer/power supply rather than the head. The head on my enlarger is connected to the power supply via a cable with something which resembles a centronics style connector. In addition the power supply has connections for "Timer 220V", "Timer 110V", "Timer Input" and "Mains". The power from the house connects to the "Mains" connector. The power supply for the timer is connected to either "Timer 220V" or "Timer 110V" depending on your line voltage. The output from the timer is then connected to "Timer Input" which is used as the relay/switch, rather than directly powering the enlarger. I would be extremely surprised if the transformer/power supply for a 138 doesn't have something similar given mine is only 250W.

ic-racer · Feb 29, 2012

Marc Charvet said:
I found electric circuit diagram of the Durst CLS 1000 (see attachment). There's a relay in the head who switch the shutter. The lamp lights up immediately after the shutter opening. I look in greater detail the connections later and I post again.

That is the schematic for the head.

I don't have the EST1000 schematic, but I do have the EST2000 schematic. In the EST2000 the "timer input" triggers an opto-electric switch. So your timer input voltage won't fry the rest of the electronics. The timer input does NOT power the enlarger lamp, like most other types of power supplies. The "timer input" voltage only turns on a LED in the opto-electric relay.

I don't recall the exact input specs on the unit. Don't quote me but I recall something like 90V to 250V are acceptable trigger voltages. Check on you EST1000, I think the "timer input" has the specs labeled on it.

Marc Charvet · Mar 1, 2012

Thanks at all.

I'll check the connections and the specs on my EST1000, but I think you're right. I'll post the results after .

Mikael · Mar 1, 2012

I have a Durst 138 and the cls 1000 head. I can confirm it has a special connection for timer. I use it with RH Designs Stop Clock.

Marc Charvet · Mar 1, 2012

Mikael said:
I have a Durst 138 and the cls 1000 head. I can confirm it has a special connection for timer. I use it with RH Designs Stop Clock.

Hello Mikael,

Thank you for this precious information.

On my side, I have disassembled the power supply earlier. The Digitimer controls a relay into the power supply. Therefore, I think the power output of the timer is not high.

I checked it with my LPL-ET500 timer whose maximum capacity is 500 watts. Enlarger works well and the timer has not roasted !

But Mikael has already confirmed that.

RH Designs · Mar 1, 2012

Thanks Mikael, I'll file that away in our "known to work with" box .

swittmann · Mar 4, 2012

I'd like to know if the Analyser Pro can also be used with that enlarger (138/CLS1000).

RH Designs · Mar 4, 2012

Yes, Sandra - the Analyser Pro and StopClock have identical switching systems.

swittmann · Mar 6, 2012

That's great, thank you, Richard.

Durst 138s CLS 1000 and RH Designs Stop Clock

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