TRS LITTELFUSE | Alldatasheet

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Technical content

Littelfuse.com © 2021 Littelfuse, Inc. Rev: 1-C-030121 1 of 2 Time Delay Relays SINGLE SHOT TRS Series

Description

The TRS series combines an isolated, 8 A electromechanical, relay output with digital timing circuitry. False trigger of the TRS series by a transient is unlikely because of the complete isolation of the circuit from the line prior to initiation. The initiate contact is common to one side of the line and may be utilized to operate other loads. Installation is easy due to the TRS’s industry standard 8 or 11-pin plug-in base wiring. Operation (Single Shot) Input voltage must be applied to the input before and during timing. Upon momentary or maintained closure of the initiate switch (leading edge triggered), the output energizes for a measured interval of time. At the end of the delay, the output de-energizes. Opening or reclosing the initiate switch during timing has no affect on the time delay. Applying input voltage with the initiate switch closed will energize the load and begin the time delay. Reset: Reset occurs when the time delay is complete and the initiate switch is opened. Loss of input voltage resets the time delay and output. Features & Benefits FEATURES BENEFITS Complete isolation of circuit from line No false trip due to transients Industry standard octal plug connection Eliminates need for special connectors Isolated, 8 A, SPDT output contacts Allows control of loads with independent voltage sources Digital circuitry Repeat accuracy +/- 2 % Wiring Diagram L1 N/L2 L1 N/L2 L1 N/L2 8-PIN OCTAL SPDT 1 1-PIN SPDT

Ordering Information

MODEL INPUT VOLTAGE ADJUSTMENT OUTPUT FORM TIME TOLERANCE TIME DELAY TRS120A2X300 120 V ac Knob 8-Pin, Octal, SPDT +/- 20 % 7–300 s TRS120A2Y10 120 V ac Knob 8-Pin, Octal, SPDT +/- 10 % 0.1–10 s TRS24D7Z10 24 V dc/28 V dc External 11-Pin, SPDT no potentiometer +/- 5 % 0.1–10 s

Littelfuse.com © 2021 Littelfuse, Inc. Rev: 1-C-030121 2 of 2 Time Delay Relays SINGLE SHOT Disclaimer Notice – Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/product-disclaimer. Accessories OT08PC 8-pin Octal Socket for UL listing* 8-pin 35 mm DIN-rail or surface mount. Rated at 10 A @ 600 V ac. Surface mounted with two #6 screws or snaps onto a 35 mm DIN rail. OT11PC Octal Socket for UL listing* 11-pin surface & DIN rail mountable. Rated for

10 A @ 300 V ac

P1011-6 Octal Socket for UL listing* 8-pin surface mount socket with binder head screw terminals. Rated 10 A @ 600 V ac. P0700-7 Versa-Knob Designed for 0.25 in (6.35 mm) shaft of Versa-Pot. Semi-gloss industrial black finish. P1004-95, P1004-95-X Versa-Pot Panel mountable, industrial potentiometer recommended for remote time delay adjustment. C103PM (AL) DIN Rail 35 mm aluminum DIN rail available in a 36 in. (91 .4 cm) length. Selection Guide External RT P/N Selection T able VALUE PART NUMBER 100K ohm 100K ohm P1004-95 P1004-95-X Externally adjustable potentiometers. Numbers with additional “-X” include two pre-soldered 8” wire leads with 1/4” female quick-connect terminals (for clockwise increase). Function Diagram SINGLE SHOT (PULSE FORMER) V = Voltage S1 = Initiate Switch NO = Normally Open Contact NC = Normally Closed Contact TD = Time Delay R = Reset Specifications Time Delay Type Digital circuitry Range See "Ordering Information" table Repeat Accuracy ±2 % Fixed Time Tolerance & Setting Accuracy ±5, 10, or 20 % Initiate Time ≤ 70 ms Reset Time ≤ 75 ms Recycle Time ≤ 250 ms Time Delay vs Temp. & Voltage ≤±5 % Input Voltage 24/28 V dc; 24, 120 V ac Tolerance

24 V dc/ac -15 % - 20 %

120 V ac -20 % - 10 %

AC Line Frequency 50/60 Hz Power Consumption ≤ 3.25W Output Type Electromechanical relay Form Isolated SPDT or DPDT Rating 8 A resistive @ 120/240 V ac; 1/3 hp @ 120/240 V ac Life Mechanical - 1 x 107; Electrical - 1 x 10 6 Protection Insulation Resistance ≥ 100 MΩ Isolation Voltage ≥ 1500 V rms between input & output terminals Polarity Dc units are reverse polarity protected Mechanical Mounting Plug-in socket Termination Octal 8-pin plug-in or 11-pin plug-in Dimensions H 44.45 mm (1.75”); W 60.33 mm (2.38”); D (with socket) 104.78 mm (4.13”) Environmental Operating/Storage Temperature -20 °C to 65 °C/-30 °C to 85 °C Weight ≅ 4 oz (113 g) Safety Marks UL (socket required)* 4 oz (113 g) *UL Listed when used with Part Number OT08-PC, RB08-PC, OT11-PC, or RB11-PC manufactured by Custom Connector Corp. Note: Manufacturer's recommended screw terminal torque for the OT series sockets is 12 in-lbs.