AB Quality GuardPLC 1600 Manuale di istruzioni per l'installazione - Pagina 13

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When the following occurs, inputs are set to 0, a fault code is generated, and the

FAULT LED is on.

• short-circuit between two parallel connections

• reversal of two connections

• earth fault on one of the lines (only with earthed reference pole)

• line break or opening of the contacts (e.g., when one of the E-stop off

switches is pressed in the example above), the FAULT LED is on and the

fault code is generated.

IMPORTANT

Safety-Related Digital Outputs

The controller has 8 digital outputs (DO1 to DO8) whose status is indicated via

LEDs.

An output is in a safe state when it is de-energized. When a fault occurs, all outputs

are switched off.

Outputs 1 to 3 and 5 to 7 can have a load of 0.5A at an ambient temperature of

60°C (140°F). Outputs 4 and 8 can each have a load of 1A or up to 2A at an

ambient temperature of 50°C (122°F).

With an overload, one or all of the outputs are turned off. When the overload is

eliminated, the outputs are activated again according to the specified value.

Although the external line of an output is not monitored, a short-circuit will be

indicated.

For information on how to configure inputs and outputs for line

control, see the GuardPLC™ System User Manual, publication

number 1753-UM001.

GuardPLC™ 1600 Controllers

Publication 1753-IN001B-EN-P - March 2004