Mitsubishi Electric MEsoftstart/I01 Users, Installation & Instruction Manual page 43

Wiring terminal X2 (Core) – Control I/O and power
The green wiring terminal X2 on the top side of the soft starter (refer Figure 20) provides access to the wiring terminals for the
PC Interface and is where the Auto/Maintenance, remote start and reset signals to the soft starter, should be connected.
Table 17: Communication and Control I/O wiring terminals on the Core models
Terminal Terminal name
X2-1 External reset-in
X2-2 External reset-in return
X2-3 Remote Start/Stop
Remote Start/Stop
X2-4 Return and Auto /
Maintenance Return
X2-5 Auto / Maintenance
X2-6
RS-485 A and -B
X2-7
RS-485 Ground
X2-8
X2-9 DC Ground
X2-10 24V DC
43 Wiring
Terminal function description
This is an input signal to the soft starter and may be used to remotely reset the soft starter from e.g. a
PLC controller.
NOTE that the system must be configured for REMOTE operation (refer paragraph 6.7.1), close this
contactor to reset the soft starter, open it to allow the soft starter to continue.
Input: This input will start the soft starter when the switch is closed and stop the soft starter when the
switch is opened.
This is an input signal to the soft starter and may be used to remotely start the motor from e.g. a PLC
controller. The controller should use the Ready Relay output (refer Table 12 X1-1 and X1-2) to be able
to detect when the soft starter is ready to start the motor.
NOTE that the if the system is started with this signal and then stopped from the HMI push-button
or Modbus controller, this switch will first have to be opened and then again closed before the
motor will again start from a remote signal
Input: Auto / Maintenance. When this signal is active the Soft starter is in 'Auto' and control will be
possible from any remote location via RTU, TCP, PLC discrete inputs AND the TFT or Pot HMI on the
box. When this signal is not active the Soft starter is in 'Maintenance' and the control will be possible
from local location only i.e. via the Potentiometer HMI.
NOTE that this is a normally-closed switch connection. If not used the terminals must be bridged
or the soft starter will be in Maintenance.
Modbus RTU communication port. Two wire RS485-A and RS485-B terminals.
(This port is also available on J2 and J3 RJ45 connectors)
Provide 24V DC (1A) on this input to be able to safely configure the soft starter, or update software,
without having the 3 phase power connected.