Rockwell-automation 1760-xxxx Pico GFX-70 Controllers User Manual Manual de usuario descargar pdf (Pagina 144)

Publication 1760-UM002B-EN-P - March 2005

4-34 Wiring with Pico GFX-70

Rules for Wiring Relay Coils

Relay with contactor function

Coil with Contactor Function [

The output signal follows immediately after the input signal and the relay acts

as a contactor.

Figure 4.18 Signal diagram of contactor function

Impulse Relay ä

The relay coil switches whenever the input signal changes from 0 to 1. The

relay behaves like a bistable flip-flop.

Figure 4.19 Signal diagram of impulse relay

:

IMPORTANT

A coil should only be used once to retain an overview of

the relay states. However, retentive coil functions such as

S,

R, can be used several times.

The following applies to non-retentive coil functions such

as

[ (contactor), ] (negated contactor), , (rising and

falling edge detection): Each coil must only be used once.

The last coil in the circuit diagram determines the status of

the relay.

Exception: When working with jumps, the same coil can be

used twice.

on

on

on

on

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