Phoenix Contact PLC Auxiliary Relay - PLC-RSC- 12DC/21 - 12V DC
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Product Information
Full details
This Phoenix Contact PLC interface relay module (model PLC-RSC-12DC/21) is designed for industrial automation applications, providing a compact and cost-effective interface between control systems and peripheral devices. It's ideal for engineers and technicians working with DIN rail mounted control panels who need a reliable switching solution. While it offers versatility with AC/DC switching and a space-saving design, users should note its specific 12V DC control voltage requirement. Key features include its slim 6.2mm width, plug-in miniature power relay, and screw terminal connections.
All features
| Series | PLC-RSC |
|---|---|
| Model Part Number | 2966906 |
| Brand | Phoenix Contact |
Extended Product Information
FAQs
What is the purpose of the PLC-RSC-12DC/21 module?
It serves as an interface between automation control systems (like PLCs) and peripheral devices, providing a physical switching capability within a compact form factor for DIN rail mounting.
What is the required control voltage for this module?
The module requires a rated control supply voltage of 12V DC.
Can this relay switch both AC and DC loads?
Yes, the module is compatible with both AC and DC switching voltages within the relay's specified contact ratings.
How do I replace the miniature relay?
The miniature relay is plug-in. You can gently pull it out of its socket on the module, and then push a new compatible relay in until it clicks.
What is the maximum current this relay can handle?
The module has a nominal current rating of 6A.
What type of contact does this relay have?
It features one change-over contact, also known as a Single Pole Double Throw (SPDT) contact.
What are the physical dimensions of the module?
The module measures 6.2mm in width, 94mm in depth, and 80mm in height.
Is this module suitable for outdoor use?
The operating temperature range is -40°C to 60°C, but it is designed for industrial control panels and may require additional protection from environmental factors like moisture and dust if used in exposed locations.
Troubleshooting
Module does not switch
Verify the 12V DC control voltage is correctly applied to the A1/A2 terminals. Check that the miniature relay is properly seated in its socket. Ensure the control signal is present.
No continuity on output contacts
Confirm the control voltage is applied and the relay is activated. Check wiring to the COM, NO, and NC terminals. If the relay is faulty, replace the plug-in miniature relay.
Intermittent operation
Check all screw terminal connections for tightness. Ensure the module is securely mounted on the DIN rail. Verify the control voltage supply is stable.
Overheating
Ensure the module is not exceeding its 6A nominal current rating. Check for short circuits in the load connected to the output contacts. Ensure adequate ventilation around the module.
Pros and Cons
Pros
- Extremely space-saving on DIN rail due to its narrow width.
- Flexible use with both AC and DC control voltages.
- Easy relay replacement with plug-in design.
- Robust screw terminal connections for secure wiring.
- Cost-effective solution for automation interfaces.
Cons
- Requires a specific 12V DC control supply voltage.
- Contact material (Silver Alloy) may have limitations in extremely corrosive environments.
- Limited to a single change-over (SPDT) contact.
- Dimensions require consideration for panel layout planning.
Setup, Compatibility & Care
Setup:
- Mounting: Secure the module onto a standard NS 35/7.5 DIN rail. Ensure the rail is properly grounded.
- Wiring: Connect the control circuit to the designated input terminals (marked typically with coil designation, e.g., A1/A2 for the 12V DC supply) and the load circuit to the output terminals (COM, NO, NC) using the screw connections. Ensure all connections are tight.
- Relay Insertion: If not already inserted, plug the miniature power relay into the module socket until it clicks securely.
Compatibility:
- Control Voltage: This module is designed specifically for a 12V DC control supply voltage. Ensure your control power source matches this specification.
- Switching Voltage: Compatible with both AC and DC loads within the relay's contact ratings.
- DIN Rail: Designed for NS 35/7.5 DIN rails.
Care:
- Environment: Operate within the specified temperature range of -40°C to 60°C. Avoid dusty, humid, or corrosive environments unless appropriate enclosures are used.
- Cleaning: Disconnect power before cleaning. Use a dry or slightly damp cloth to wipe the exterior. Do not use solvents or abrasive cleaners.
- Maintenance: Periodically check wiring for tightness. The plug-in relay can be removed and inspected or replaced if signs of wear are apparent.