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3.4.8 Relay contacts
The soft starters of the DS7 series are provided with one or two relays with
an N/O contact depending on the current range. The relays are galvanically
isolated from the power section.
Table 16: Relay contacts
Relays (Control
Designation
signal terminal)
13/14
TOR
or -A2/13
23/24
RUN / READY
In applications in which the relay contacts (TOR, RUN / READY) control
external contactors, the contactor coil must be connected in order to
increase interference immunity:
•
for AC voltage with an RC filter,
•
for DC voltage with free-wheel diode.
TOR, RUN/READY
3
4
AC
AC
Figure 66: Relay contacts with permissible load and recommended connection
The illustration below shows the operating points for the Run signals at relay
contacts TOR (13/14) and RUN (23/24).
DS7 Soft starter 09/16 MN03901001Z-EN www.eaton.com
Function
Top-of-ramp: Signals operation with full voltage on the motor
(top of start ramp reached; set time t-Start elapsed).
Operating signal during ramp time (t-Start, t-Stop), as well as during
continuous operation (= TOR)
Default setting: RUN
Note:
This relay is only installed in devices of sizes 2, 3 and 4.
AC
AC-version
3 Installation
3.4 Electrical Installation
(+)
(-)
DC
DC
DC-version
87
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