TERRY Melody 1, Installation Manual

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Terry Melody 1 - Installation Instructions - ED01050g
31
ref: ED01074b, dated: 24/08/2006
MELODY 1 LIFT GATE CONTROL CIRCUIT
The melody lift has been developed with safety as one of the main design
criteria. The below circuit and associated text describes the interlocks
associated with the gate functionality.
If the lift is at top or bottom, pressing a gate release button will remove 24
volts from timer contact B1 and trigger the timer.
The upper solenoid will only be powered from the timer if the lift is at the top
(via the upper limit switch) and similarly the lower solenoid when the lift is at
the bottom via the lower limit switch.
In the circuit below, when the lift reaches the top or bottom and the up/down
button is released, the appropriate gate is released for 2 seconds. If the lift
is left after the timer has timed out, a further release of 2 seconds can be
given by pressing any gate release button. If the lower gate is closed, there
is a delay of 6 seconds before the lift will rise when the up/down button is
pressed.
In order to use only one timer on the Melody one, a 24 volt relay is required to
put 24v on pins A1 and 15 of the timer if the lift is stationary i.e. if none of the
up/down buttons are not pressed.
NOTES