DC bus voltage measurement
The DC bus voltage can exceed 800 Vdc. The DC bus LED is not an
indicator of the absence of DC bus voltage.
DANGER
ELECTRIC SHOCK, EXPLOSION OR ARC FLASH
• Disconnect the voltage supply to all connections.
• Wait 15 minutes to allow the DC bus capacitors to discharge.
• Use a properly rated voltage-sensing device for measuring
(>800 Vdc).
• Measure the DC bus voltage between the DC bus terminals (PA/+
and PC/-) to verify that the voltage is less than 42 Vdc.
• Contact your local Schneider Electric representative if the DC bus
capacitors do not discharge to less than 42 Vdc within a period of
15 minutes.
• Do not operate the product if the DC bus capacitors do not dis-
charge properly.
• Do not attempt to repair the product if the DC bus capacitors do
not discharge properly.
Failure to follow these instructions will result in death or seri-
ous injury.
Standards and terminology
Technical terms, terminology and the corresponding descriptions in
this manual are intended to use the terms or definitions of the perti-
nent standards.
In the area of drive systems, this includes, but is not limited to, terms
such as "safety function", "safe state", "fault", "fault reset", "failure",
"error", "error message", "warning", etc.
Among others, these standards include:
• IEC 61800 series: "Adjustable speed electrical power drive sys-
tems"
• IEC 61158 series: "Digital data communications for measurement
and control – Fieldbus for use in industrial control systems"
• IEC 61784 series: "Industrial communication networks – Profiles"
• IEC 61508 series: "Functional safety of electrical/electronic/
programmable electronic safety-related systems"
Also see the glossary at the end of this manual.
LXM32 Safety Information
Common DC bus 9
MNA01M001EN, V1.01, 08.2014