Time Delay Relays

Part Number	Description / PDF	Quantity
ATE1-3M-220VAC IndustrialeMart	ON-DELAY MAX 3M 220VAC DPDT(2C)	21
TTM4060M-110VAC IndustrialeMart	MINI TIMER 60M 4PDT 110VAC	5
ATE1-30M-110VAC IndustrialeMart	ON-DELAY MAX 30M 110VAC DPDT(2C)	0
ATS8W-21 IndustrialeMart	TWIN TIMER 10H 24VAC/DC 8PIN	7
ATE-30S IndustrialeMart	ON-DELAY MAX 30S 110/220VAC	0
ATE1-3S-110VAC IndustrialeMart	ON-DELAY MAX 3S 110VAC DPDT(2C)	0
ATE1-60M-220VAC IndustrialeMart	ON-DELAY MAX 60M 220VAC DPDT(2C)	0
ATE1-60S-110VAC IndustrialeMart	ON-DELAY MAX 60S 110VAC DPDT(2C)	34
ATE1-10S-12VDC IndustrialeMart	ON-DELAY MAX 10S 12VDC DPDT(2C)	0
ATS11W-23 IndustrialeMart	TWIN TIMER 30H 24VAC/DC 11PIN	14
TTM4010M-220VAC IndustrialeMart	MINI TIMER 10M 4PDT 220VAC	10
ATS11-21D IndustrialeMart	TIMER 10H DPDT(2C) 24VAC/DC	0
TTM4030M-24VDC IndustrialeMart	MINI TIMER 30M 4PDT 24VDC	5
ATS11-41D IndustrialeMart	TIMER 10H DPDT(2C) 24-240VAC/DC	25
ATE-24H IndustrialeMart	ON-DELAY MAX 24H 110/220VAC	0
TTM4005M-24VDC IndustrialeMart	MINI TIMER 5M 4PDT 24VDC	0
TTM4060S-110VAC IndustrialeMart	MINI TIMER 60S 4PDT 110VAC	5
TTM4060M-24VDC IndustrialeMart	MINI TIMER 60M 4PDT 24VDC	5
ATE-3H IndustrialeMart	ON-DELAY MAX 3H 110/220VAC	9
AT8N IndustrialeMart	TIMER 100H 100-240VAC/24-240VDC	1045

Time Delay Relays

1. Overview

Time Delay Relays (TDRs) are control devices that execute switching operations after a predetermined time interval. They integrate timing functions into electrical systems to manage sequence operations, protect equipment, and optimize process efficiency. Modern industrial automation relies on TDRs for precise control in applications ranging from motor startups to complex manufacturing processes.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
On-Delay Relay	Delays contact closure after power application	Motor soft start, conveyor belt synchronization
Off-Delay Relay	Delays contact opening after power removal	Fan cooling systems, oven shutdown sequences
Interval Timer	Controls fixed-duration outputs	Valve actuation, injection molding cycles
Repeat Cycle Timer	Alternates between on/off states	Conveyor indexing, periodic lubrication systems

3. Structure and Components

Typical TDR construction includes:

Enclosure: Flame-retardant polymer housing (IP20-IP67 ratings)
Electromagnetic System: Coil assembly with laminated iron core
Contact Mechanism: Silver alloy contacts (NO/NC configurations)
Timing Circuit: Analog RC circuits or digital microcontrollers
User Interface: Dial/potentiometer or digital display for setting adjustment

4. Key Technical Specifications

Parameter	Typical Range	Importance
Timing Range	0.1s-999h	Determines application flexibility
Accuracy	1% to 10ms	Critical for precision processes
Power Supply	12-240V AC/DC	Matches system voltage requirements
Contact Rating	5-30A resistive	Ensures load compatibility
Ambient Temp. Range	-20 C to +70 C	Operational reliability factor

5. Application Areas

Primary industries include:

Manufacturing: Press machine sequence control
Energy: Transformer cooling systems
Building Automation: HVAC fan delay control
Process Industry: Pump alternation systems
Transportation: Railway signal timing

Typical equipment integration: CNC machines, packaging lines, water treatment systems.

6. Leading Manufacturers and Products

Manufacturer	Key Product Series	Distinguishing Features
Siemens	3RP25/3RP15 series	DIN rail mounting, LED status display
Omron	H3CR-A/-M models	Multi-voltage capability, compact design
Schneider Electric	Tesys T-ModTime series	Modbus communication, 12 timing functions
AutomationDirect	DL-TDR series	Programmable via USB interface

7. Selection Recommendations

Key considerations:

Timing function type (ON/OFF delay, interval, etc.)
Environmental conditions (temperature, vibration)
Electrical requirements (voltage/frequency compatibility)
Mounting method (DIN rail, panel mount, socket mounting)
Agency approvals (CE, UL, CSA standards)

Case Study: A bottling plant successfully implemented Omron H3CR-M timers for conveyor synchronization, achieving 15% throughput improvement.

8. Industry Trends

Emerging developments include:

Integration with Industrial IoT (remote monitoring via Ethernet/IP)
Adoption of solid-state relay technology (SSR) for higher switching speeds
Energy-efficient designs meeting Ecodesign Directive 2019/1782
AI-enhanced predictive timing adjustment in smart manufacturing