Dimensions are shown for
reference purposes only.
Dimensions are in inches over
(millimeters) unless otherwise
Specifications and availability
subject to change.
Refer to inside back cover.
Initial Dielectric Strength
Between Open Contacts: 500V rms, 60 Hz.
Between All Other Conductors: 500V rms, 60 Hz.
Delay on operate – Delay period begins when input voltage is applied. At
the end of the delay period, the relay will operate and will not release until
input voltage is removed. Reset occurs when input voltage is reapplied.
Delay on release – Input voltage must be applied continuously to operate
the internal relay. When the control switch is closed, the relay energizes.
When the control switch is opened, timing begins. When timing is
complete, the relay will de-energize. Time may be reset to zero during
timing by closing the control switch.
Interval on (without control switch) – The relay energizes and timing
begins when input voltage is applied. At the end of the time delay period
the relay will de-energize. Reset is accomplished by removing, then
reapplying, the input voltage.
Interval on (with control switch) – Input voltage must be applied
continuously to operate the internal relay. The relay energizes and timing
begins when the external switch is closed. At the end of the time delay
period the relay will de-energize. Reset is accomplished by opening and
reclosing the control switch.
CMOS IC Time Delay Relay
• Choice of timing modes
– Delay on operate
– Delay on release
– Interval on with or without control switch
• Knob adjustable
• 10A output relay with SPDT or DPDT contacts
• Various models time from 0.1 sec. to 100 min.
Input Data @ 25°C
Voltage: 24 and 120VAC, and 12 and 24VDC.
Power Requirement: AC Types: Typically less than 3 VA.
DC Types: Typically less than 3 W.
Transient Protection: Yes.
Reverse Voltage Protection: Yes.
Temperature Range: Storage: -55°C to +85°C.
Operating: -10°C to +55°C.
Termination: 8- or 11-pin octal style plug.
Enclosure: White plastic case. Knob adjustable types have dial scale for
Sockets: Models with 8-pin base fit either 27E122 or 27E891 (snap-on)
screw terminal sockets. 11-pin types fit either 27E123 or
27E892 (snap-on) screw terminal sockets.
Weight: 6 oz. (170g) approximately.
Contact Data @ 25°C
Arrangements: 2 Form C (DPDT), except 8-pin delay on release model
has 1 Form C (SPDT).
Material: Silver-cadmium oxide alloy.
Rating: 10A @ 30VDC or 277VAC, resistive; 1/2 HP @ 250VAC;
1/3 HP @ 120VAC.
Expected Mechanical Life: 10 million operations.
Expected Electrical Life: 100,000 operations, min., at rated load.
Input Voltages & Limits @ 25°C
Voltage Nominal Minimum Maximum
Type Voltage Voltage Voltage
AC 24 20 28
120 105 130
DC 12 11 13
24 20 32
Note: DC voltage must be filtered (5% p-p ripple max. at nom. voltage).
AC models will operate on 50 or 60 Hz.
Timing Ranges: From 0.1 to 1.0 sec. through 10 to 100 min.
Timing Adjustment: Knob adjustable.
Tolerance (for AC units add ±1/2 cycle 60 Hz.):
Knob Adj. Types:–0, +30% of max. specified at high end of timing range;
min. specified, or less, at low end.
Fixed Types: ±10%.
Res. Adj. Types: ± 10% at high end of timing range; min. specified, or less,
at low end.
Delta Time (for AC units add ±1 cycle 60 Hz.): ±10%.
Repeatability (for AC units add ±1 cycle 60 Hz.): ±2%.
Release Time: 60 ms, typ.; 100 ms, max.
Recycle Time: 60 ms, typ.; 100 ms, max.
Users should thoroughly review the technical data before selecting a product part
number. It is recommended that user also seek out the pertinent approvals files of
the agencies/laboratories and review them to ensure the product meets the
requirements for a given application.