Pilz PSS67 F 16DI SB-T Manual de usuario descargar pdf (Pagina 17)

Operating Manual: PSS67 F 16DI SB-T

4-1

Function Description

Inputs

Single and dual-channel input devices can be connected to the inputs, with

or without test pulses. The inputs are equipped with input filters.

Input signals must show a “High” (“1” signal) of 15 VDC (+15 ... +30 VDC)

and a “Low” (“0” signal) of 0 VDC (-3 ... +5 VDC).

The input status is signalled to the CPU on the controlling PSS via

SafetyBUS p. Green LEDs indicate the status of the inputs. An LED lights

up as soon as a “1” signal is present at the input.

Diagnostic circuitry checks the function of the inputs and the input filter. If

an error is detected, all the outputs in the affected I/O-Group are shut down

and the I/O-Group switches to a STOP condition. The module then triggers

an error telegram on SafetyBUS p and stores the error in its error buffer.

Where test pulses are not used, inputs with single-channel input devices

can be used in applications up to and including Category 2 in accordance

with EN 954-1; in the case of dual-channel input devices, this extends to

Category 3 applications. The possibility of a short circuit occurring in the

external wiring between different inputs or against the supply must be

eliminated through appropriate wiring.

Test pulses must be used for applications with single-channel input

devices above Category 2 and for applications with dual-channel input

devices above Category 3.

Connection examples can be found in the chapter entitled: “Wiring the

Inputs and Test Pulse Outputs”.

The inputs can be assigned to two I/O-Groups. Please refer to the section

entitled “Setting the device address”.

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Pilz PSS67 F 16DI SB-T Manual de usuario Pagina 17