700-FSY2DU23 Allen-Bradley

700-FSY2DU23 Allen-Bradley Central control module

Brand：Allen-Bradley Model number：700-FSY2DU23

Country of origin: United States Product weight：0.55kg

HS code：8517623990

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Product Details：

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The Allen-Bradley 700-FSY2DU23 is a Timing Relay from the Bulletin 700-FS series, specifically categorized as a Solid-State Timing Relay with Multifunction capabilities. These relays are used in industrial control systems to introduce time delays or control sequencing operations.

Product Specifications

Product Series: Bulletin 700-FS (Slim Line)
Function: Multifunction Timing Relay
Time Range: The relay offers a broad time adjustment range, typically from $0.05 \text{ seconds}$ to $100 \text{ hours}$ across several selectable ranges.
Timing Modes (Functions): It typically includes several selectable timing modes, which are common to multifunction timers:

ON-Delay (A): Time delay starts upon coil energization.
OFF-Delay (B): Time delay starts upon coil de-energization (requires control power throughout).
Single Shot (H): Output energizes for a fixed duration upon input trigger.
Symmetrical Flasher (L): Output cycles ON and OFF with equal duration.
Interval (C): Output energizes immediately upon coil energization and remains energized for the set time.

Input Voltage (Control Voltage): Dual Input Voltage (DU) capability: $24-240 \text{ VAC/VDC}$ (Wide-ranging universal power supply).
Output Configuration: 2 Changeover Contacts (2C/O), meaning 2 DPDT (Double Pole, Double Throw) relays (23) in this designation. This provides two independent sets of contacts (one normally open (NO) and one normally closed (NC)) that switch simultaneously.
Contact Rating: Typically rated for use with pilot duty circuits, often $3 \text{ A}$ at $240 \text{ VAC}$ .
Mounting: DIN Rail Mountable (Standard $35 \text{ mm}$ DIN rail).
Housing: Slim industrial housing design, typically around $22.5 \text{ mm}$ wide.

Product Advantages

High Versatility (Multifunction): The inclusion of multiple timing modes in a single unit significantly reduces inventory and provides flexibility, as the same relay can be used for various timing applications (ON-delay, OFF-delay, Flasher, etc.).
Universal Voltage: The $24-240 \text{ VAC/VDC}$ dual voltage capability simplifies purchasing and stocking, allowing the module to be powered by virtually any common control voltage found globally.
Space Saving: The "Slim Line" design (e.g., $22.5 \text{ mm}$ width) allows for a high density of control components within a panel, saving critical panel space.
Accuracy and Reliability: As a solid-state relay, it offers high timing accuracy and repeatability compared to older electromechanical timers, leading to more reliable machine operation.

Important Considerations (Precautions)

Contact Type: Note that the output contacts are relay contacts (electromechanical), even though the timing circuit itself is solid-state. Contact life is finite and determined by the load and switching frequency.
Wiring Diagrams: Always consult the specific wiring diagram provided by Allen-Bradley for the chosen timing function, as connection points for control power and output contacts can vary based on the function selected.
Voltage Selection: Ensure the wide-ranging power supply is connected correctly to the appropriate terminals as shown in the documentation. Incorrect wiring can damage the unit.
Load Rating: Do not exceed the maximum $3 \text{ A}$ (or similar) contact current and voltage rating. For higher current loads, the timing relay must be used to control an intermediary device like a contactor or a solid-state relay.
Control Power: Be aware that for the OFF-Delay function, control power must remain supplied to the relay throughout the timing period; only the trigger signal is removed.

Product Applications

The 700-FSY2DU23 timing relay is widely used in various industrial and commercial control scenarios where precise time-based control of processes is required.

Motor Control Sequencing: Implementing start-up delays for motors or fans in HVAC systems, ensuring proper pump cycling, or staggering the start of multiple motors to reduce inrush current.
Machine Safety and Interlocks: Introducing a time delay after a safety gate is closed before a machine is allowed to start, or ensuring a process completes before the next step begins.
Automated Lighting and Heating: Using the flasher function for visual alarms or the ON-delay function for delayed activation of heating elements.
Conveyor Systems: Controlling the timing of product flow, sequencing transfers, or setting a minimum dwell time at a specific station.

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