Risk Assessments; Common Residual Risks In Each Function - Mitsubishi Electric MR-D30 Instruction Manual

1. FUNCTIONS AND CONFIGURATION

1.9 Risk assessments

To ensure safety, users should decide all the risk assessments and residual risks in the entire machine
equipment. A company and individual who constructed the safety related system must take full responsibility
for installation and commissioning of the system. Additionally, when complying with a European machinery
directive, the system must acquire safety standards certification as a whole.
Perform all risk assessments and safe level certification to the machine or the system as a whole. It is
recommended that a Certification Body final safety certification of the system be used.
The following shows residual risks concerning the safety observation function of this product.

1.9.1 Common residual risks in each function

(1) At the shipment to end-users, check the settings of safety related components with programming tools
and monitored/displayed contents on display and record and save the setting data concerning the safety
observation function and the programming tools you used. Perform them using a check sheet, etc.
(2) The safety will not be ensured such as in assembling machine until installing, wiring, and adjustment are
completed properly. Install, wire, and adjust your system referring installation guide for each unit.
(3) Only qualified personnel are authorized to install, start-up, repair or adjust the machines in which these
components are installed. Only trained engineers should install and operate the equipment. (ISO 13849-
1 Table F.1 No.5)
(4) Separate the wiring for safety observation function from other signal wiring.
(ISO 13849-1 Table F.1 No.1)
(5) Protect the cables with appropriate ways (routing them in a cabinet, using a cable guard, etc.).
(6) We recommend using a switch, relay, sensor, etc. which comply with safety standards. When using a
switch, relay, sensor, etc. which do not comply with safety standards, perform a safety confirmation.
(7) Keep the required clearance/creepage distance depending on voltage you use.
(8) The time to a safety observation error depends on parameter settings.
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