MACROMATIC Multi-Function Encapsulated Timing Relay: Surface Mounted, 12 to 125V
Model: THR-3816U
Multi-Function: 4 common time delay functions
Universal Voltage: 24-240VAC & 12-125VDC
Time Ranges: 0.1 Sec to 100 Minutes
Onboard & remote adjust of time delay
Cost effective design & compact 2” x 2” enclosure
Encapsulated for protection against harsh environments
10A SPDT relay output contacts can handle most pilot duty & fractional HP loads
THR-3816U products have 4 functions & 4 time ranges built-in:
Functions
On Delay
Off Delay
Interval
Single Shot
Time Ranges
0.1-10S
1-100S
10-1000S
1-100M
Programming is accomplished through the use of one 6-position DIP-switch.
Voltage Tolerance: AC Operation: +10/-15% of nominal at 50/60 Hz; DC Operation: +10/-15% of nominal.
Load (Burden): Maximum of 2 VA for all voltages
Setting Accuracy: Maximum Setting (Adjustable): +5%, -0%; Minimum Setting (Adjustable): +0%, -50%
Repeat Accuracy (Constant Voltage & Temperature): +0.1% or + 0.04 seconds, whichever is greater
Reset Time: Triggered with Input Voltage: 100ms; Triggered with Control Switch: 40ms
Output Contacts: 10A @ 240VAC / 7A @ 28VDC, 1/4hp @ 120VAC (N.O.)
Life: Mechanical: 10,000,000 operations; Full Load: 100,000 operations
Temperature: -28o to 65oC (-18o to 149oF)
The THR-3 Series products are designed to replace thousands of products from Macromatic and many other manufacturers with just three Catalog Numbers.
Each comes with four functions and four timing ranges covering 0.1 second to 100 minutes (1,000 minutes on THR-3856U dual time unit). On the same unit, choose between onboard adjustable, onboard fixed and remote adjustable time delay setting. All set up is done with DIP switches for ease of use. A universal input voltage of 24-240V AC and 12-125V DC adds to the ultimate flexibility of these products. All products are encapsulated for protection against harsh elements. A 10A SPDT relay output rating can handle
most pilot duty and fractional HP loads.
Onboard Adjustable Time Delay-after selecting the desired time range, use the top-mounted potentiometer provided with the unit to adjust within that range
Onboard Fixed Time Delay-although these units come with an onboard potentiometer, they can be used to replace products with fixed time delays.
After selecting the desired time range, set the top-mounted potentiometer at the fixed delay required (epoxy can be applied to prevent further changes if desired).
Remote Time Delay (THR-3816U & THR-3836U only)-after selecting the desired time range & setting up the unit for remote time delay adjustment, connect a remote potentiometer for remote adjustability or a resistor for fixed time delay. Note that these products will only work with 100K, 1M or 2M remote potentiometers or resistors.
Operating Time Accuracy: +0% -50% (Minimum Setting (Adjustable)); +5% -0% (Maximum Setting (Adjustable))
Adjustment Method: Dip Switch
Reset Method: Time-Limit Reset
Adjustment Interface: Analog
Power Consumption 2 VA
Body Height: 2 in
Body Width: 2 in
Body Depth: 0.79 in
Electrical Operating Durability: 100,000
Mechanical Operating Durability: 10,000,000
Minimum Operating Temperature: -18 °F
Maximum Operating Temperature: 149 °F
Environmental Protection: Enclosed
These relays have mounting features that secure with screws on surfaces like walls, control panels, and enclosures. They help protect relays from moving due to vibrations and impacts, making them ideal for applications around running motors.