OFF Delay Timer
The KH2 Series off delay timer operates with power continuously applied. The load, such as a relay coil, is energized when an external control voltage is applied. When the control voltage is removed, the off delay begins while the load remains energized. At the end of the delay, the load de-energizes (turns off) and the timer resets.
This analog delay timer module is available with either fixed or adustable timing ranges. An external potentiometer can be connected to the timer for variable off delay. A resistor can be used to configure a fixed timer. Both
on delay and off delay modules may be pcb mounted for multiple
delay actions. Voltage input available from 12 to 110 Volts DC and 12 to 240 Volts AC.
Having many years of proven reliability, this timer is an excellent choice for critical applications where long-term dependablity is desired.
• Timing from 0.1 to 300 seconds
• Reliable Analog Circuit
• Adjustable or Fixed Off Delay
• Miniature PC Board
• Thick Conformal Coating
• Printed Circuit Mounting
Table 1. Part Number Selection
Timer Action:
(2) Off Delay
Timer Range:
Standard Time
(1) .1 to 10 second
(2) .5 to 5 second
(7) 3 to 30 second
(4) 30 to 300 sec.
Nonstandard Time
(5) 1 to 10 second
(3) 5 to 50 second
(8) 6 to 60 second
(6) 12 to 120 sec.
(0) *Special Time
*Customer defined
Input Voltages:
(AC or DC)
Standard Voltage
(2) 24VAC
(1) 120VAC
(8) 12VDC
(4) 24VDC
Nonstandard Voltage
(7) 12VAC
(5) 240VAC
(6) 48VDC
(3) 110VDC
Selecting an OFF Delay Timer
Order Code Example: KH251A
KH = Analog Series Icsotimer
(2) = Timer Action = OFF Delay
(5) = Timer Range = 1-10 Seconds
(1) = Input Voltage = 120 VAC
A = Current Revision
Options. Fixed and Special Time ranges from .05 seconds to 300 Seconds.
Flat side shown with catalog numbers. Heatsink leads when soldering close to module. Control switch, load and resistor are customer-supplied items.
Operating Parameters:
Repeat Accuracy
Fixed conditions = ±3%, ± 1 cycle for AC units. Overall variation = ±10%
Input voltage range
±20% for AC units
±20% @ 20% max. peak to peak ripple for DC units
Temperature range
-10 to +70 °C operating
-20 to +85 °C storage
Reset Time
Action 2 = 150 ms.
Initiate time (Control switch)
Action 2 = 50 ms.
KH2 Series Analog Icsotimer
