Best Practices

Overview

When the machine is commissioned, the connected segments are usually hidden from sight of the machine operator and cannot be monitored directly.

 WARNING
UNSUPERVISED MACHINE START-UP
Only start the machine if there are no persons within the zone of operation of moving machine components.
Failure to follow these instructions can result in death, serious injury, or equipment damage.

Verify Connections

Step

Action

1

Verify all terminals, connectors, and other connections on all system components for correct and firm fit.

2

Only use robust connectors and secure fixings.

3

Verify the protective earth ground (PELV, Protective Extra Low Voltage) of the power supplies (24 Vdc SFO / 48 Vdc DC bus).

4

Verify the wiring of the DC bus (48 Vdc) from the Lexium™ MC connection module to the track. Only use the pre-assembled cable provided by Schneider Electric. Refer to Technical Data for Cables.

5

Verify the wiring of the safety function to the segments to avoid an interchange of the SFO+ and SFO– inputs. Only use the pre-assembled cable provided by Schneider Electric. Refer to Technical Data for Cables.

6

Use coded connectors (refer to chapter Connecting SFO (Safe Force Off) to the Track) and perform a commissioning test (refer to chapter Commissioning).

7

Use only appropriate transport packaging to forward or return individual system components.

 DANGER
ELECTRIC SHOCK DUE TO INADEQUATE PROTECTIVE SEPARATION
Only connect devices, electrical components, or lines to the signal voltage connectors of these products that feature a sufficient, protective separation from the connected circuits in accordance with the standards (IEC 61800-5-1: Adjustable speed electrical power drive systems - safety requirements).
Failure to follow these instructions will result in death or serious injury.

External Forces

The defined safe state of the Lexium™ MC12 multi carrier is achieved when the segments are set to a de-energized state. This means that the coils in the segments no longer exert an electromagnetic force on the carriers.

If external forces act upon the carriers, they will not necessarily maintain their position. In any case, the carriers will coast to an unassisted stop. This coast down time depends on physical properties of the components used (such as weight, torque, friction, and so on), and additional measures such as mechanical brakes may be necessary to help prevent any hazard from materializing. If the defined safe state is inappropriate for your application where external forces may move the carriers as determined by your risk assessment, implement other external safety-related measures.

 WARNING
UNINTENDED EQUIPMENT OPERATION
  • Make certain that no hazards can arise for persons or material during the coast down period of the carriers/machine.
  • Do not enter the zone of operation during the coast down period.
  • Ensure that no other persons can access the zone of operation during the coast down period.
  • Use appropriate protective devices (functional safety devices) in compliance with local and national standards.
Failure to follow these instructions can result in death, serious injury, or equipment damage.