I finally found this reference:

http://www.rtcmagazine.com/home/article.php?id=100822&pg=2

"The slave controller chips are in the same range as standard Ethernet chips 
(roughly $5 in quantity 10,000). The synchronization mechanism for EtherCAT 
is already built in. Other solutions that rely on IEEE 1588 require an extra 
chip. All together this makes EtherCAT a very affordable technology."

btw, I will be travelling in a couple of weeks to germany, might get in 
contact with Beckhoff for some details.

Regards,
Alex


----- Original Message ----- 
From: "Peter C. Wallace" <[EMAIL PROTECTED]>
To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
Sent: Monday, October 29, 2007 9:16 PM
Subject: Re: [Emc-users] Ethernet I/O


> On Mon, 29 Oct 2007, Alex Joni wrote:
>
>> Date: Mon, 29 Oct 2007 21:00:22 +0200
>> From: Alex Joni <[EMAIL PROTECTED]>
>> Reply-To: "Enhanced Machine Controller (EMC)"
>>     <emc-users@lists.sourceforge.net>
>> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
>> Subject: Re: [Emc-users] Ethernet I/O
>>
>>> Umm, no... As master, no problem but slaves will be expensive:
>>>
>>> Ethercat slaves require either custom proprietry hardware or proprietary
>>> IP
>>
>> Hmm, unfortunately I can't argue there.. been trying to find some prices 
>> for
>> a slave chip.
>> I found some products, but no prices anywhere:
>> - beckhoff ET1100, ET1200
>> - ESC10, ESC20
>> and some FPGA IP Core for Altera & Xilinx
>>
>> Maybe you have an idea how expensive they are?
>
>
> No, I looked into this several months ago but was discouraged by the
> hardware requirements. For the sychronization standards, I have more faith
> that IEEE 1588 will get embedded in more Ethernet chips and processors 
> with
> Ethernet, for example:
> Ethernet Transceiver with IEEE 1588 PTP Hardware Support from National 
> Semi
> (Product News, 17 Oct 2007 )
>
> National Semiconductor has introduced its Ethernet transceiver with 
> integrated
> hardware support for the IEEE 1588 Precision Time Protocol (PTP). For
> applications in motion control, instrumentation, data acquisition and
> telecommunications, the DP83640 precision PHYTER transceiver synchronizes 
> the
> distributed network nodes to a master clock with 8-nanosecond accuracy.
>
>
> The model DP83640 precision PHYTER transceiver synchronizes distributed
> network nodes to master clock with 8 nsec accuracy and offers 100 Mb
> synchronous Ethernet mode that eliminates any inaccuracy caused by clock 
> drift
> between nodes. It integrates hardware time stamping of receive and 
> transmit
> packets, high-accuracy IEEE 1588 clock, and 12 GPIO pins that handle
> simultaneous real-time events/multiple triggers. Device interfaces with 
> any
> microcontroller, FPGA, or ASIC with Ethernet MAC. The samples of the 
> DP83640
> transceiver are available now in a 48-pin LQFP. The DP83640 will be priced 
> at
> $5.24 each in 1,000-unit quantities.
>
>
>
>
>
>
>>
>> Regards,
>> Alex
>>
>>
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>
> Peter Wallace
> Mesa Electronics
>
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