Load control [RE-wrenches]

[William Miller]

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At 09:48 AM 11/8/2004, you wrote:

Mark:

Thanks for the reply.

1. No temp sensor.
2. Jumper is in load control
3. We have no sticker, but refer to the drawing in the manual for rough 
setting, the test point for fine setting and data acquisition for verification.

In spite of the above, we find that two separate units will work fine for 
days on end and then fail to disconnect for no apparent reason.  These are 
used C40s, so maybe it is some defect due to life span.  It does not seem 
appropriate to purchase a new one for load control since A. we have had 
problems with two units, and B. there must be something out there 
cheaper.  We are, after all, only switching something like 150 MA.



William Miller







>Hi William,
>
>When the C series are in Load Control mode they are indeed either on or 
>off, and do not PWM at all, and should be OK for relay drive. Some things 
>to watch out for:
>
>1. The battery temp sensor should not be connected during load control mode.
>2. Check that the jumper is in the load control position.
>3. Check that the load control adjustment stickers are installed around 
>the potentiometers for set points.
>
>
>Regards,
>Mark
>
>
>Mark Edmunds
>Xantrex Technology Inc.
>
>
>
>-----Original Message-----
>From: William Miller [mailto:wrmiller at slonet.org]
>Sent: Saturday, November 06, 2004 11:21 AM
>To: RE-wrenches at topica.com
>Subject: Re: Load control [RE-wrenches]
>
>
>Friends:
>
>Thanks to Bob-O and others for feedback.  This application has a Heart
>Interface that won't die.  I'm still nostalgic for the 120/240 output.....
>
>I know the C40 is PWM for charge control, but was unaware it is PWM for
>load control.  My data acquisition curve shows simple on/off
>switching.  Maybe my sample rate is too low to show PWM?
>
>In any event the failure of two C40s to work reliably tells me it's the
>wrong device.  Solar Converter may have a device.  What about Morning
>star?  Now that I'm typing this, I realize I have a two channel voltage
>controlled switch in the shop.  APC, methinks....
>
>William
>
>
>At 05:31 PM 11/5/2004, you wrote:
>
> >William,
> >The C40 is a PWM controller with no adjustment for turn on, turn off.
> >Inappropriate for driving a relay or any motor load. It should be used for
> >resistive loads only. You need a very simple voltage controlled switch
> >with adjustable on and off points to drive the relay. If you are using an
> >SW inverter, you've got it built in already. If an SW+, buy the ALM module.
> >bob-O
> >>Friends:
>
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