Rockwell Automation 1760-xxxx Pico GFX-70 Controllers User Manual - Manual (Page 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