From: email@example.com (Jay B)
Date: 05 Oct 2002 08:34:39 GMT
Organization: AOL http://www.aol.com
Subject: Re: Relay controlling electric doorstrike - kickback protection needed?
the relay will have a diode across it for this protection, or add one
yourself... , or hire a pro to install it, standard procedure...
>Subject: Re: Relay controlling electric doorstrike - kickback protection
>From: "Bruce Kingsley" firstname.lastname@example.org
>Date: 10/4/2002 10:19 PM Central Daylight Time
>If your not sure, you can have your controller drive a larger external relay
>that you know is designed to handle the larger AC inductive load.
>"ohaya" wrote in message news:3D9CD4D3.2A11DA3F@cox.net...
>> I'm looking into control an electric doorstrike using a device made by a
>> company called B&B Electronics called the 232DRIO:
>> According to the website (and the PDF manual there), this device has two
>> relay outputs, so I am thinking of using the relay to close the loop
>> between a 16VAC transformer and the doorstrike. Here's the page on the
>> doorstrike and transformer:
>> I spoke to (supposedly) and engineer at B&B today, and was asking if the
>> 232DRIO is used with something like a doorstrike (i.e., an
>> electro-mechanical device), whether I needed to add anything to protect
>> the relay against kickback, or whether the 232DRIO has protection
>> already built in. She couldn't tell me, so I asked if she could tell me
>> specifically which relay(s) were used in the device so I could look up
>> the specs myself.
>> Unfortunately, I don't think the person I spoke to knew much, as she
>> kept telling me that there was no relay on the board, and that the relay
>> was "on the chip" (presumably the microcontroller) [Note that the
>> 232DRIO is spec'ed to handle 120VAC].
>> I was wondering if anyone has had any experience with the 232DRIO? If
>> so, can you provide info about which relay is used?
>> If not, I was wondering, in general, if I should add any additional
>> circuitry between the relay and the doorstrike to protect the relay?
>> Thanks in advance!