SMC Networks SMC7824M/VSW manual Protection against Excessive High Contact Voltage

IMN	Installation Manual
	TigerAccess™ EE

1.2Protection against Excessive High Contact Voltage

When dealing with the power supply or working on it, observe the provisions of VDE 0105 (operation of high-voltage equipment) Part 1, Section 9.3 (safety measures to be carried out) and the specifications of the European Norm EN 50110, Part 1 and Part 2 (Operation of electrical systems) at all times. Be sure to follow local national provisions regarding the handling of high-voltage equipment.

The limit description for input voltage and load current is located near the power connec- tor on the rear panel of the system. Check the description for the actual value.

1.3Protection against Escaping Laser Light

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In order to avoid health risks, take care to ensure that any laser light escaping is not di- rected towards the eyes. Plug-in units equipped with laser light units may carry the laser symbol, but it is not required, see Fig. 1.1.

Fig. 1.1 Laser Symbol

To guard against any possible hazards, all optical transmitters are equipped with an au- tomatic laser shutdown circuit. This trips if an input signal is missing at the relevant opti- cal receiver, e.g. if the connection is interrupted.

Note that the laser safety shutdown must be always activated.

This preventive measure should also be followed to avoid any damage to health by mak- ing sure that escaping laser light is not directed towards the eye.

When breaking laser connections, the following procedure should be followed, despite the presence of the laser shutdown circuit:

1.Pull out the plug-in unit about 5 cm.

2.Disconnect the optical fiber.

3.Pull out the plug-in unit completely.

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