6 Status messages
6.2 Output relay
42 EMS2… Electronic motor starter 10/19 MN034003EN www.eaton.com
6.2 Output relay
In good working condition, the device output relay is in the off position
(contact between terminals 95 and 96). When an error occurs, the relay
switches (contact between the terminals 95 and 98) and remains until the
error has been acknowledged (see the following Section “Resetting after an
error message”).
6.3 Resetting after an error message
The acknowledging (reset) of an error can be carried out in various ways.
The options depend on the nature of the error (￫ table 11, page 41).
• Automatic reset
• Manual reset
• via the button on the front of the device
• via a contact
• via a PLC (only with devices with U
S
= 24 V DC)
6.3.1 Automatic reset
When a phase or a motor that is not connected fail, or in the case of an oper-
ation beneath the minimum current I
min
, the EMS2 electronic motor starter is
automatically reset as soon as the error has been remedied.
Figure 23: Circuit for an automatic reset
To reset automatically after a message from the motor protector, the termi-
nals RES and AUT must be bridged. The automatic reset takes place after
approx. 20 minutes of cooling-down time.
It is possible to reset the device using a manual command during this period
of time. The condition for this is that the cooling-down time for a manual
reset (approx. 2 minutes) has passed. (One of the L, R or ON LEDs is flash-
ing).
￫
The output relay serves exclusively to indicate operating states.
It is not part of the safety chain.
WARNING
If an error is acknowledged and a command on the terminals L,
R or ON is pending, the motor starter is automatically started
up.
In this case, use external measures (e. g. by means of an inter-
lock) to ensure that there is no hazardous situation.
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