X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao104.cox.net ([68.230.241.42] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3731337 for flyrotary@lancaironline.net; Wed, 24 Jun 2009 15:20:20 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.42; envelope-from=alventures@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao104.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20090624191944.XWCJ17135.fed1rmmtao104.cox.net@fed1rmimpo02.cox.net> for ; Wed, 24 Jun 2009 15:19:44 -0400 Received: from BigAl ([72.192.135.181]) by fed1rmimpo02.cox.net with bizsmtp id 7vKj1c00a3uzsQg04vKjSZ; Wed, 24 Jun 2009 15:19:43 -0400 X-VR-Score: 0.00 X-Authority-Analysis: v=1.0 c=1 a=Ia-xEzejAAAA:8 a=JOA0iUbgAAAA:8 a=N8B9JuSIAAAA:8 a=xpRahBimnPwdhPLrO4wA:9 a=i5rKNlwcAB9TrGoibhjVt_QHCqgA:4 a=EzXvWhQp4_cA:10 a=7H_sd1ppysN2ranevTEA:7 a=x3WBevYDUGEt92XHLlRMQj6c3t0A:4 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Relay Woes Date: Wed, 24 Jun 2009 12:20:00 -0800 Message-ID: <290DDB31F82B49469C22640A2D2594DF@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0004_01C9F4C6.1847F240" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6838 Thread-Index: Acn04VlPcgd7xgMuSKikHzLJUGvzvQAJ5kcg X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0004_01C9F4C6.1847F240 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Dave; =20 You'll notice on the data sheet for the relay you bought it says "yes" = under the "zero cross function" - Which I'd take to mean for DC it will not = turn off. =20 Al =20 -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of David Leonard Sent: Wednesday, June 24, 2009 7:34 AM To: Rotary motors in aircraft Subject: [FlyRotary] Relay Woes =20 For you EE types, I have a question. I am installing a smoke system = and wanted to use a relay to control the pump. I bought this relay from = Mouser that I thought would do the trick: http://www.mouser.com/Search/ProductDetail.aspx?qs=3DsGAEpiMZZMtLEhJ5P%2f= NsZ6b nrz6%2f%252b%252bJvA50eSiydqPQ%3d The problem is that if there is any load (like the pump or even the = 0.02A indicator LED I installed, then the relay will not turn off when I turn = off the signal voltage. So either I do not understand how to use the relay, = or I chose the wrong relay. I have checked my wiring in-so-much as to = confirm that the signal voltage does turn on and off with the switch, voltage = across the 'LOAD" terminals does disappear when there is no load but not when = there is a load (current). =20 Is it possibly because this relay is designed for an AC load? Other suggestions? --=20 David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net ------=_NextPart_000_0004_01C9F4C6.1847F240 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Dave;

You’ll notice on the data = sheet for the relay you bought it says “yes” under the “zero = cross function” – Which I’d take to mean for DC it will not = turn off.

Al

-----Original = Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of David Leonard
Sent: Wednesday, June 24, = 2009 7:34 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] = Relay Woes

For you EE types, I have a = question. I am installing a smoke system and wanted to use a relay to control the = pump. I bought this relay from Mouser that I thought would do the trick:

http://www.mouser.com/Sea= rch/ProductDetail.aspx?qs=3DsGAEpiMZZMtLEhJ5P%2fNsZ6bnrz6%2f%252b%252bJvA= 50eSiydqPQ%3d

The problem is that if there is any load (like the pump or even the = 0.02A indicator LED I installed, then the relay will not turn off when I turn = off the signal voltage. So either I do not understand how to use the = relay, or I chose the wrong relay. I have checked my wiring in-so-much as to = confirm that the signal voltage does turn on and off with the switch, voltage = across the 'LOAD" terminals does disappear when there is no load but not = when there is a load (current).

Is it possibly because this relay is designed for an AC load? = Other suggestions?

--
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net http://RotaryRoster.net

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