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General Catalogue • Modular Devices • Technical
Delay Timers
Delay Timers
Delay timer devices are used to control a variety of processes where
the requirement is for switching circuits on, off or delaying the on or
off switching for a pre-set period of time. Typical device types are...
• Delay on - intended to delay the starting or switching of a circuit for
a set period of time following the command signal e.g. to delay
the starting of motor loads where a large number of motors are to
be started by the same switch to reduce the effects of the starting
currents.
• Delay off - intended to delay the stopping or switching off of a
circuit for a set period of time following the removal of the
command signal e.g. to overrun an extractor following the
switching off of a process that creates fumes.
• Adjustable time on - intended to switch on for a set period, the
command signal must remain on throughout the set
period e.g. to switch on two sets of heaters with one set
(the boost) switching off after the set period.
• Impulse timer - intended to switch on for a set period, the
command signal length is not important e.g. to boost a time clock
controlled circuit such as a water storage heater.
• Symmetrical timer - intended to toggle a circuit on and off in
regular time patterns e.g. to run an extractor intermittently.
Multifunction Timer - 6 Individual Functions
A = Timer.
B = Delay off (output relay opens either at end of command or
after set time period - which ever is shorter).
C = Delay off.
D = Delay on.
E = Delay on (output relay closes either at end of command or
after set time period - which ever is shorter).
F = Symmetrical timer.
On selection - contact permanently closed
Off selection - contact permanently open
Output relay open - with no command
Output relay open - with command signal running
Output relay closed - with command signal running
Output relay close - with command signal removed
Output relay closed (EZN005)
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