Hello Grasso,
You asked about info on "safety" relays. The German machine tool assoc
also has a standard ZH1/457 which requires "forcibly guided contacts"
maintaining at least 0.5mm gap over life. No contact may change state out of
syncronization with another even in the event of welding, coil failure,
etc.. Some parts of the machinery directive seem to have similar
requirements.
Both Siemens and Hengstler in Germany make such a device (same design, both
manufacture it). It is a four pole PCB style relay with a choice of
2-make/2-break or 3-make/1-break contacts. They are not in the same Siemens
group we are, but, if interested, you may contact me for a copy of the
Siemens datasheet and follow it from there.
I'm not sure where you are located so I will give you both sources. If your
quantities are relatively large, the marketing people here at SEC would also
assist you if you are US based.
Siemens series is V23049 (SR4)
Contact is:
Hr. Novak EC R N V/A
Siemens AG
EC WB PL5, Bln M
Grossbeerenstrasse 2
D-12068 Berlin 42 Germany
Ph. 9 011 49 30 7023 2573
Fax. 9 011 49 30 7023 2575
Hengstler series is HDZ-468 (SR4)
Contact is:
Mr. Shawki Elgarhi
Hengstler Bauelemente GmbH
Woerthstrasse 31
Postfach 1249
W-7209 Wehingen Germany
Tel. 9 011 49 7426 68 128
Fax. 9 011 49 7426 68 283
Both contacts are in engineering - but they can refer you to the appropriate
sales/marketing personnel.
Please contact me directly f I can assist.
Best regards,
Harold Leipold
Applications Engineering
Siemens EC
Princeton, IN USA
Tel. (812)386-2161
Fax. (812)386-2616
E-mail [email protected]
----------
From: GRASSO%STKWWHDQ
To: emc-pstc
Subject: Seeking source for relays
List-Post: [email protected]
Date: Monday, October 07, 1996 3:33PM
We have recently been hammered by the Machinery Directive and need to find a
source of relays that are Forced Guided Contact relays.. Anyone out there
have
a source for these relays??
