Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of the Schneider Electric Harmony RE17R Timing Relay. This dual-function timing relay offers precise control over operations, ensuring devices and circuits function in a coordinated manner. It is designed for integration into hard-wired logic schematics and is suitable for various industrial automation, HVAC systems, and other applications requiring precise timing control.
The RE17R relay features a compact 17.5mm width, allowing for flexible DIN rail installation, and offers simple, precise settings via rotary trimmers. It includes a diagnostic button for quick circuit checks and supports both on-delay and pause timing functions.
Safety Information
Always observe the following safety precautions to prevent personal injury or damage to the equipment:
- Installation and maintenance should only be performed by qualified personnel.
- Disconnect all power before working on the device or connected circuits.
- Ensure proper grounding to prevent electrical shock.
- Verify that the supply voltage and current ratings match the device specifications.
- Do not operate the device if it is damaged or malfunctioning.
Setup and Installation
The Harmony RE17R timing relay is designed for easy installation on a DIN rail.
Mounting
The relay's slim 17.5mm form-factor allows it to be mounted on a standard DIN rail, occupying the same space as a modular 1-pole DIN device. Ensure the DIN rail is securely fastened in a suitable enclosure.
Figure 1: Side view of the RE17R relay, illustrating its DIN rail mounting capability.
Wiring
The relay supports both screw and spring terminals for adaptable wiring. Refer to the terminal markings on the device for correct connections.
- Power Supply (A1, A2): Connect the appropriate 24 V DC or 24-240 V AC/DC power supply to terminals A1 and A2.
- Control Input (Y1): For specific timing functions (e.g., pause, summation), connect the control signal to terminal Y1.
- Output Contacts (15, 16, 18): The relay features 1 changeover contact SPDT (Single Pole Double Throw).
- Terminal 15: Common contact
- Terminal 16: Normally Closed (NC) contact
- Terminal 18: Normally Open (NO) contact
Figure 2: Front view of the RE17R relay, highlighting the terminal connections for power, control, and output.
Operating Instructions
The Harmony RE17R offers dual timing functions and precise time setting capabilities.
Time Setting
The timing relay can be set for delays ranging from 0.1 seconds to 100 hours using the rotary trimmers on the front panel. The sealable cover helps secure the settings once configured.
- Time Range Selection: Use the upper rotary switch to select the desired time range (e.g., 0.1s-1s, 1s-10s, 1h-10h, 10h-100h).
- Time Value Adjustment: Use the lower rotary switch to fine-tune the specific time value within the selected range.
Figure 3: Example timing diagram illustrating the delay (T) between an input signal (U) and the relay output (R1).
Diagnostic Button
An instant diagnostic button is built into the device. Pressing this button allows for quick checks of downstream circuits, which can significantly reduce troubleshooting time during installation or maintenance.
Dual Functionality
The RE17R supports dual functions, including on-delay and pause timing, as well as summation control signals. Consult the specific wiring diagrams for your application to utilize these advanced features.
Maintenance
The Schneider Electric Harmony RE17R Timing Relay is designed for reliable operation with minimal maintenance. However, periodic checks can ensure optimal performance and longevity.
- Visual Inspection: Regularly inspect the relay for any signs of physical damage, discoloration, or loose connections.
- Terminal Tightness: Periodically check that all terminal connections are secure. Loose connections can lead to overheating or intermittent operation.
- Cleaning: If necessary, gently clean the exterior of the relay with a dry, soft cloth. Do not use abrasive cleaners or solvents.
- Environmental Conditions: Ensure the operating environment remains within the specified temperature and humidity ranges to prevent premature failure.
Always disconnect power before performing any maintenance tasks.
Troubleshooting
If the Harmony RE17R timing relay is not functioning as expected, consider the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Relay does not energize | No power supply; incorrect wiring; faulty relay | Check power connections (A1, A2); verify supply voltage; inspect wiring for errors; test relay with known good power source. |
| Incorrect timing delay | Incorrect time range or value setting; control signal issue | Adjust rotary trimmers to the desired time range and value; verify control signal (Y1) is applied correctly. |
| Output contacts not switching | Overload; faulty contacts; incorrect load wiring | Check load current against 8A rating; verify wiring to contacts (15, 16, 18); use diagnostic button to check downstream circuit. |
| Diagnostic button no response | Internal fault; no power to relay | Ensure relay is powered; if power is present and button still unresponsive, the unit may require replacement. |
If problems persist after attempting these solutions, contact Schneider Electric technical support for further assistance.
Specifications
| Feature | Detail |
|---|---|
| Model Number | RE17RAMU |
| Brand | Schneider Electric |
| Timing Range | 0.1 seconds to 100 hours |
| Functions | Dual Function (On-delay, Pause), Summation Control |
| Supply Voltage | 24 V DC, 24 to 240 V AC/DC |
| Output Rating | 8 Amps |
| Contact Type | 1 Changeover Contact SPDT (Single Pole Double Throw) |
| Contact Material | Silver Alloy |
| Mounting Type | DIN Rail Mount |
| Width | 17.5mm |
| Product Dimensions | 2.83 x 0.69 x 3.54 inches |
| Weight | 2.47 ounces |
| Connector Type | Quick Connect |
Warranty and Support
For information regarding product warranty, technical support, or service, please refer to the official Schneider Electric website or contact their customer service department. Details can typically be found in the product packaging or on the manufacturer's website.
You can visit the Schneider Electric Store for more products and information.
