Doug In the past I’ve worked on control cabinets used in Semi-Conductor plant equipment and this is an extract from an earlier version of SEMI S2 I have:
13.5 Uninterruptable Power Supplies (UPSs) — This section applies to UPSs with outputs greater than: 30 volts rms, 42.4 volts peak; 60 volts DC; or 240 volt-amps. 13.5.1 Whenever a UPS is provided with the equipment, its location and wiring should be clearly described within the installation and maintenance manual. 13.5.2 Power from the UPS should be interrupted when any of the following events occur: the emergency off actuator (button) is pushed; or the main equipment disconnect is opened; or the main circuit breaker is opened. EXCEPTION: Upon EMO activation, the UPS may supply power to the EMO circuit, safety related devices, and data/alarm logging computer systems as described in the exception clauses of § 12.2. 13.5.3 The UPS may be physically located within the footprint of the equipment provided that the UPS is within its own enclosure and is clearly identified. 13.5.4 The UPS should be certified by an accredited testing laboratory and be suitable for its intended environment (e.g., damp location, exposure to corrosives). 13.5.5 The UPS wiring should be identified as ‘UPS Supply Output’ or equivalent at each termination point where the UPS wiring can be disconnected. We never put warning signs for UPS on the outside of the cabinet, but there were high voltage warning signs and detailed explanation within the manual. Best regards Charlie Charlie Blackham Sulis Consultants Ltd Tel: +44 (0)7946 624317 Web: https://sulisconsultants.com/ Registered in England and Wales, number 05466247 From: Doug Nix <d...@ieee.org> Sent: Wednesday, August 2, 2023 10:24 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Hazard warning labels on panel doors where COTS UPS installed? Colleagues, I have a client who has installed a COTS UPS in an industrial control panel. The UPS is being used to keep the HMI alive in a power outage or if the disconnecting device is switched off. I have scoured the resources that I have, and I can find nothing that requires a label on the outside of the panel to indicate that there is a UPS inside. EN 60204-1:2018 does not address this. I have a copy of EN IEC 62040-1, and it does not require a hazard warning label anywhere. Any guidance you might offer is appreciated. Doug Nix d...@ieee.org<mailto:d...@ieee.org> +1 (519) 729-5704 ________________________________ This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to All emc-pstc postings are archived and searchable on the web at: https://www.mail-archive.com/emc-pstc@listserv.ieee.org/<https://www.mail-archive.com/emc-pstc@listserv.ieee.org/%20> Website: https://ewh.ieee.org/soc/pses/ Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe)<https://ewh.ieee.org/soc/pses/list.html> List rules: https://ewh.ieee.org/soc/pses/listrules.html For help, send mail to the list administrators: Mike Sherman at: msherma...@comcast.net<mailto:msherma...@comcast.net> Rick Linford at: linf...@ieee.org<mailto:linf...@ieee.org> For policy questions, send mail to: Jim Bacher at: j.bac...@ieee.org<mailto:j.bac...@ieee.org> ________________________________ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1 - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: https://www.mail-archive.com/emc-pstc@listserv.ieee.org/ Website: https://ewh.ieee.org/soc/pses/ Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe) List rules: https://ewh.ieee.org/soc/pses/listrules.html For help, send mail to the list administrators: Mike Sherman at: msherma...@comcast.net Rick Linford at: linf...@ieee.org For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> _________________________________________________ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1
