Eaton PROFIBUS-DP EZ204-DP User Manual Page 98

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Wiring with EZ
MN05013003E94
Latching relay
The “latch” and “unlatch” relay functions are used in pairs. The
relay picks up when latched and remains in this state until it is
reset by the “unlatch” function.
:
Figure 45: Latching relay signal diagram
Range A: The Set coil and the Reset coil are triggered at different
times
Range B: Reset coil is triggered at the same time as the Set coil
Range C: Power supply switched off
Representation in EZ:
Q output relays:
SQ1 to SQ8, RQ1 to RQ8 (depending on
type)
•M markers:
SM1 to SM16, RM1 to RM16
(Text) D function relays: SD1 to SD8, RD1 to RD8
S relays:SS1 to SS8, RS1 to RS8
Use each of the two relay functions S and R once only per
relay.
If both coils are triggered at the same time, priority is given to
the coil further down in the circuit diagram. This is shown in
the above signal diagram in section B.
on
on
S
R
on
AB C
I1-I2----SQ1
I2-------RQ1
EZ500_700.book Page 94 Tuesday, May 3, 2005 5:15 PM
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