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Siemens 3RP2540-1AB30 Electronic OFF-Delay Relay, 0.05-600s

Siemens 3RP2540-1AB30 electronic OFF-delay timing relay.

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ManufacturerSiemens

Part number3RP2540-1AB30

Manufacturer Siemens

Part Number 3RP2540-1AB30

Type Timing Relay, Electronic OFF-Delay

Time Ranges 7 (0.05 s...600 s)

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Electronic OFF-delay function Non-volatile memory Smooth passing make contact 7 adjustable time ranges Wide time range (0.05 s-600 s) 24V AC/DC operation

Product description

The Siemens 3RP2540-1AB30 is an electronic timing relay featuring an OFF-delay function without needing a control signal for smooth passing make contact. It is non-volatile, ensuring settings are retained. This relay operates on 24V AC/DC at 50/60 Hz AC and provides 7 adjustable time ranges from 0.05 seconds to 600 seconds. It includes a single change-over contact, an LED status indicator, and screw terminals for secure connections.

This OFF-delay relay is ideal for applications where a load needs to remain energized for a specific period after the control signal is removed. Common uses include controlling cooling fans, managing pneumatic or hydraulic system de-energization, and in safety circuits where a timed shutdown sequence is required. It is valuable in industries such as HVAC, manufacturing, and power generation.

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Technical specifications

Manufacturer	Siemens
Part Number	3RP2540-1AB30
Type	Timing Relay, Electronic OFF-Delay
Time Ranges	7 (0.05 s...600 s)
Voltage	24 V AC/DC
Frequency	50/60 Hz AC
Contacts	1 Change-Over (C/O)
Features	Non-Volatile, Smooth Passing Make Contact
Terminals	Screw
Indicator	LED

Common applications

Cooling Fan Control

System De-energization

Safety Circuits

Timed Shutdown

HVAC Control

Manufacturing Processes

Compatible systems

General Industrial Control PLC Systems HVAC Systems Machine Automation

Also known as

3RP25401AB30 Siemens OFF Delay Timer SIRIUS Non-Volatile Relay

Replaces / compatible with

This OFF-delay timing relay is designed to replace older Siemens models or other brands with similar OFF-delay timing functions. Please verify the voltage, time range, and contact configuration for compatibility.

Technical note

Expert tip

The 'smooth passing make contact' feature ensures reliable operation in conjunction with PLC inputs or other logic devices by providing a clean contact transition.

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Frequently asked questions

What does 'non-volatile' mean for the Siemens 3RP2540-1AB30 timing relay?

Non-volatile means that the relay's set time range and function settings are retained even if the main control power (24V AC/DC) is interrupted. This ensures that the relay will resume operation with the same settings when power is restored, preventing the need for reprogramming.