Description
Product Name: 74101-181 Allen Bradley Power module
Product details:
The Allen-Bradley 74101-181 is typically identified as a component related to the Bulletin 700-R Relays, specifically a Timing Relay.
- Manufacturer: Allen-Bradley / Rockwell Automation
- Series: Bulletin 700
- Component Type: Timing Relay (often referred to as a Solid State Timing Relay or Time Delay Relay)
- Function: This type of device is used in industrial control circuits to introduce a time delay before a certain action is executed, or to control the duration of an action. Common timing modes include On-Delay, Off-Delay, or One-Shot.
📊 Product Parameters (Typical Specifications)
While the exact specifications can vary slightly depending on the specific revision or configuration, here are the typical parameters for this type of Allen-Bradley timing relay:
| Parameter | Typical Specification |
| Operating Voltage (Coil) | 120V AC or 24V DC (Check specific model) |
| Timing Range | Adjustable, common ranges are 0.1s to 60s, or 0.5s to 100s, etc. |
| Output Contacts | Typically 1 or 2 sets of contacts (e.g., 1 Normally Open (NO) and 1 Normally Closed (NC)) |
| Contact Rating | 5A to 10A at 120/240V AC (Resistive) |
| Timing Function | On-Delay (TDON) is the most common for the 741xx series |
| Mounting | 8-pin or 11-pin octal base (plug-in) or Panel Mount |
| Operating Temperature | $0^\circ\text{C}$ to $55^\circ\text{C}$ ($32^\circ\text{F}$ to $131^\circ\text{F}$) |
✨ Product Advantages
- Reliability: Allen-Bradley products are known for their robust design and long operational life, reducing downtime.
- Ease of Replacement: Being a plug-in style relay, it is easy to swap out and replace without extensive wiring changes.
- Versatility: The adjustable timing range makes it suitable for a wide variety of industrial control applications.
- Standardization: As part of the Bulletin 700 line, it integrates seamlessly with other standard Allen-Bradley control components.
- Precise Timing: Solid-state circuitry often provides more accurate and repeatable timing than older electromechanical timers.
⚠️ Important Considerations (Precautions)
- Voltage Check: Always verify the coil (operating) voltage before installation. Using the wrong voltage will damage the relay.
- Load Rating: Do not exceed the maximum contact current/voltage rating (Amps/Volts) when wiring the load.
- Timing Mode: Confirm that the relay’s timing mode (e.g., On-Delay, Off-Delay) is correct for your application logic.
- Wiring: Follow the wiring diagram printed on the relay or found in the manual precisely. Incorrect wiring can cause malfunction or damage.
- Base Type: Ensure you have the correct compatible socket/base (e.g., 8-pin or 11-pin) for the relay to plug into.
🌐 Product Applications
The Allen-Bradley 74101-181 timing relay is used whenever a controlled time delay is required in an electrical or industrial control system.
- Motor Control:
- Implementing Wye-Delta (Star-Delta) starting for motors, where a delay is needed to switch from the wye to the delta winding.
- Sequencing the starting of multiple motors or pumps.
- Conveyor Systems:
- Ensuring a minimum delay between product transfers or indexing steps.
- Timing cycles for batch processes.
- Heating/Cooling Systems:
- Providing a delay for compressor anti-short cycle protection.
- Sequencing the start of heating elements.
- Safety and Alarm Systems:
- Introducing a brief delay before an alarm is triggered, allowing for momentary fault conditions to clear without nuisance alarms.
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