Ampcontrol CSM Pty Ltd - ABN 35 000 770 141
ECDB006 MEC-1 User Manual
MEC-1 USER MANUAL R0 13/03/2020 13:16 Page 14 of 18
6.3 Remote Start
Remote start mode can be selected via the DIP switches at the front of the panel.
Switching to or from remote start mode while the power is applied will cause a trip (the
relay will de-energise and the Start Timed Out LED will come ON).
In remote start mode, a 100Ω resistor (1%, 5W) must be connected in series with the pilot circuit and a normally open button
connected in parallel to this resistor. The loop resistance of the circuit will then be 100Ω plus the resistance of the cable.
To start the MEC-1 in remote start mode the following sequence must be followed:
1. All trips must be clear.
2. The start resistor must be detected in the pilot circuit.
3. The start button must be pressed for a minimum of 500ms.
4. The start button must be released within 15s or “Start Button timed out” trip will occur.
The start timed out fault is automatically reset once the start resistor is detected (A manual reset is not required).
6.4 Latching mode
Latching mode can be selected via the DIP switches at the front panel.
When a fault occurs in latching mode the trip will be latched, preventing the MEC-1 from starting (even if the fault is cleared),
until a manual reset occurs.
In latching mode, if a fault occurs, the corresponding LED will be turned on and the trip
will be latched. If another fault occurs, while the previous trip is still latched, the LED
corresponding to that fault will flash.
6.5 Manual reset procedure
To use the reset function, the user must connect a switch (typically a NO momentary pushbutton) between the RST input and
the positive of the supply (see ‘Electrical Connections’ section 4.3 for more information).
In latching mode, the user must manually reset the unit after a fault has occurred. The procedure is as follows:
1. Clear the fault.
2. Press the reset button for a minimum of 500ms.
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