ABB CT-ERS.21S 1SVR730100R0300 Electronic Timer

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• 1. Product Overview

  The ABB CT-ERS.21S (1SVR730100R0300) is an electronic timer used in industrial automation and control systems for delay, interval, or cyclic control. It provides precise timing and repeatable operation for controlling motors, pumps, valves, lighting, or other equipment. Electronic design ensures high accuracy, stability, and long service life.

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  2. Technical Specifications

  Parameter	Description
  Model	CT-ERS.21S / 1SVR730100R0300
  Type	Electronic Timer
  Timing Range	0.1 s ~ 100 h (adjustable depending on version)
  Timing Modes	On-delay, Off-delay, flashing/cycle mode optional
  Supply Voltage	24–240 V AC/DC (depending on version)
  Output	1 relay output (SPDT / 1 CO)
  Terminals	Screw or plug-in terminals
  Accuracy	±1%
  Mounting	DIN rail
  Operating Temperature	-20℃ to +60℃
  Housing Material	Flame-retardant plastic
  Protection	IP20
  Standards	IEC 60947-5-1 / EN 60255

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  3. Key Advantages & Features

  1. High Accuracy Timing

     • Precise time control with ±1% tolerance, suitable for high-precision industrial applications.

  2. Multiple Timing Modes

     • Supports on-delay, off-delay, and cyclic control for flexible applications.

  3. Easy Installation and Maintenance

     • DIN rail mounting and convenient terminal design for wiring and replacement.

  4. Wide Voltage Adaptation

     • AC/DC wide voltage range suitable for various industrial environments.

  5. High Reliability

     • Electronic design with durable relay output ensures long-term stable operation.

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  4. Typical Applications

  • Industrial automation control systems

  • Timing control in distribution and control panels

  • Motor, pump, and fan start/stop timing

  • Lighting, heating, and cooling system control

  • Production line and machinery equipment control

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  5. Usage Precautions

  • Installation: Must be installed by qualified electricians; ensure supply voltage matches timer rating.

  • Wiring: Terminals should be tightened securely to avoid poor contact.

  • Timing Settings: Set appropriate time according to load and process requirements; avoid too short or too long delays.

  • Environmental Conditions: Avoid high temperature, humidity, dust, and corrosive environments.

  • Maintenance: Periodically check relay output and terminal tightness to ensure normal operation.

   

The structure and details of the product：

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