Page 7 - IDEC timer catalogue

Timers Timing Diagrams Overview

ON-Delay One-Shot Output 1 (signal start) Cycle One-Shot Output (signal start)

Voltage is applied to the coil at all times. When a momentary start signal is sup- Voltage is applied to the coil at all times. When a momentary start signal is sup-
plied, the contacts remain in the off state and the preset time begins. Following plied, the contacts remain in the off state and the preset time begins. Following
the preset time, the contacts transfer to the on state and remain in the on state the preset time, the contacts transfer to the on state. The contacts remain in
for the one-shot preset time. Following the one-shot preset time, the contacts the on state for the one-shot preset time. After the one-shot preset time has Switches & Pilot Lights
transfer back to the off state and remain there until the timer is reset. The timer elapsed, the contacts transfer back to the off state. The contacts remain in the
can be reset by applying either a reset input or removal of the coil voltage. Ap- off state for the preset time minus the one-shot preset time. The timer cycles
plicable model: GT3D-8. between on and off states until the timer is reset by a reset input or removal of
the coil voltage. Applicable model: GT3D-8.
Start Input
Start Input
Output
T Ts Output
T Ts Ts Ts Display Lights
Type No. GT3D-8
T T
Mode 1
See Page 813 Type No. GT3D-8
Mode 2
ON-Delay One-Shot Output 2 (signal start) See Page 813
Voltage is applied to the coil at all times. When a maintained start signal is sup-
plied, the contacts remain in the off state and the preset time begins. Following True Power-OFF Delay
the preset time (start input is still present), the contacts transfer to the on state When voltage is applied, output comes on immediately; when voltage is
and remain in the on state for the one-shot preset time. When the one-shot removed from the coil, the timer begins timing (internal capacitors power the
preset time has elapsed, contacts transfer back to the off state and remain timing circuit). When time has expired, contacts transfer back to the OFF state. If Relays & Sockets
there until timer is reset. The timer can be reset by a reset input, removal of the power is reapplied before the elapsed time has expired, the timing function will
coil voltage or removal of start input. Applicable model: GT3D-8.
reset back to the starting point. Applicable models: GT3F-1, 2.

Start Input
Start Input

Output
Output
T Ts
T
Type No. GT3D-8 Timers
Type No. GT3F-1, 2
Mode 3
Mode Power OFF-Delay
See Page 813
See Page 826
Sequential Start (power start) Recycler Outputs (power start)

When voltage is applied to the coil, both contacts remain in the OFF state When voltage is applied to the coil, both contacts remain in the off state and
and the set time, T1, begins. When T1 has elapsed, output 1 comes on and T2 time T1 begins. When T1 has elapsed, both contacts transfer to the ON state
begins. When T2 has elapsed, output 2 comes on. Both outputs remain on until and T2 begins. When T2 has elapsed, both contacts transfer back to the OFF
power is removed from the coil. Applicable model: GT3W-A.
state and T1 begins again. The cycle continues until power is removed, at which Terminal Blocks
time both contacts transfer back to the OFF state. Applicable model: GT3W-A.

Start Input
Start Input
Output
T1 T2 T1 T2
Output
T1 T2
Type No. GT3W-A
Type No. GT3W-A Mode D Circuit Breakers
Mode A See Page 834
See Page 834
1. T = set time, T’ = shorter than set time, Ts = one shot output time
2. For more detailed timing diagrams, see specifi cations for individual timer models.

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