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When using RE7CV relays with time delay adjustment potentiometers, the potentiometers must be connected in the following way:
To set the time in off-delay mode the opposite ends of the potentiometer must be connected to Z1 and Z2.
The potentiometer wiper is connected to Z2. See (7) below
To set the time in on-delay mode the opposite ends of the potentiometer must be connected to Z2 and Z3.
The potentiometer wiper is connected to Z2. See (8) below.
The potentiometer should be 47K Ohm Linear Type, rated at 0.2W or greater, which are not sold by Schneider.