Pilz PSS67 F 16DI SB-T Manual do Utilizador descarregar pdf (Página 37)

Operating Manual: PSS67 F 16DI SB-T 7-11

Example: Dual-channel, failsafe input device, with test pulse

Features:

• Depending on the application area and its respective regulations, this

connection diagram is suitable for applications up to Category 4 in

accordance with EN 954-1.

• This type of connection is mainly used for signal inputs with infrequent

operation.

• On input devices with identical channels, each channel should be given

a separate test pulse, where possible. This will ensure that all short

circuits are detected, with the exception of short circuits which short out

the input device (cable from the test pulse to the input device and cable

from the input device to the input).

• If the input device has only one test pulse, a short circuit between the

cables from the input device to the inputs will not be detected. In this

case the unit should be suitably wired to avoid the risk of this type of short

circuit. If diverse input devices are used, this type of error will be

detected.

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Pilz PSS67 F 16DI SB-T Manual do Utilizador Página 37