ST2 Series Solid
State
Interval (One-Shot)
Timer
Timing Mode:
Upon application of power the load is energized and the time delay cycle is initiated. At
the end of the delay time the load is de-energized. Reset is accomplished by removing
input power.
Timing Diagram:
… 100% solid state circuitry - no
moving parts
… CMOS digital timing circuitry
… Fixed or field adjustable delays
from milliseconds to hours
… 2 amperes continuous load current
(10 amperes available, consult factory)
… UL File # Pending
… CSA File #Pending
Contact Information:
Solid state switching device 1 form A; normally open series connection. Continuous
current rating 2 amperes. Maximum inrush 20 amperes. Voltage drop 2.5 volts RMS or
less @ 2 amperes. (For 10 ampere load current rating consult factory)
Timing Specifications:
Timing: Factory fixed, or .1 seconds to 100 hours in any of the ranges below. Timing is
set by user supplied resistor or potentiometer. Custom timing available.
Timing ranges:
.1 to 10 seconds
.2 to 20 seconds
1 to 100 seconds
10 to 1000 seconds
.1 to 10 minutes
Timing tolerance: fixed units +/- 10%
Timing repeatability: 2%
Timing cycle interrupt transfer: none
Outline Dimensions:
1 to 100 minutes
10 to 1000 minutes
.1 to 10 hours
1 to 100 hours
AC (60 Hz) and DC Input Voltages & Limits
Nominal Minimum Maximum
12V 10V 14V
24V 20V 28V
48V 41V 55V
110V 95V 125V
120V 105V 130V
230V 190V 255V
External Resistor Selection:
Wiring Diagrams:
Mechanical Information:
Enclosure 2 X 2 X 3/4 inch black plastic, epoxy sealed. Center hole mounting. Three or
five 1/4 inch quick connect male terminals
Ordering Information:
Definition of a part number for the Amperite ST2 Series Time Delay Relay:
Example:
A: Denotes nominal input voltage. Voltages available: 12V, 24V, 120V & 230V AC;
12V, 24V, 48V & 110V DC. Custom voltages are available.
B: Denotes type of input power required for operation: A = AC - Alternating Current; D
= DC - Direct Current.
C & D: Denotes range of adjustability by using an external resistor or potentiometer,
where C is the minimum timing and D is the maximum timing. Standard timing span is
100:1. For fixed timing units specify a single number.
E: Denotes unit of time delay: S=seconds; M=minutes; H=hours.
F: Denotes Amperite ST2 Series solid state, normally open time delay.
Solving Your Relay Requirements Since 1922
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