Safety Relay Module - Finder - 4NO 2NC 6A 24VDC
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Product Information
Full details
This Finder Safety Relay Module (MPN: 7S1690245420) is designed for industrial safety applications requiring high reliability and compliance with strict safety standards. It offers a 4NO+2NC configuration and a 6A at 24VDC rating, providing a secure solution for machine and installation safety. A key benefit is its robust construction and adherence to multiple international standards. However, users should note that it is specifically designed for DC control circuits and may require additional components for AC applications.
All features
| Energy Efficiency | A |
|---|---|
| Model Part Number | 7S1690245420 |
| Brand | Finder |
Extended Product Information
FAQs
What is the main purpose of a safety relay module like this?
Safety relay modules are used in control systems to ensure that machinery stops safely in the event of a hazard, such as a safety guard being opened or an emergency stop button being pressed. They are designed to a higher integrity level than standard relays.
What does the '4NO+2NC' configuration mean?
It means the relay has four Normally Open (NO) contacts that will close when the relay is energized and two Normally Closed (NC) contacts that will open when the relay is energized. For safety applications, the NO contacts are typically used in series with the safety circuit.
Can this relay be used for AC loads?
Yes, it can switch AC loads up to 5A, but its primary rating and design considerations often lean towards DC control circuits in safety applications. Always verify your load requirements against the relay's specifications.
What is the significance of 'guided contacts'?
Guided contacts ensure a direct mechanical link between the normally open and normally closed contacts. This means if an NO contact welds shut, the corresponding NC contact cannot close, providing a higher level of safety assurance.
Does this module require a specific power supply?
Yes, it requires a 24V DC power supply for the coil. Ensure your power source is stable and meets this voltage requirement.
What standards does this relay comply with?
It complies with machine and installation safety standards EN 13849-1, railway standards EN 61373 and EN 50155, and fire safety regulation UNI 11170-3.
How is this relay mounted?
It is designed for standard 35mm DIN rail mounting, making installation straightforward in industrial control cabinets.
Troubleshooting
Relay does not energize when coil voltage is applied.
Verify the 24V DC power supply is connected correctly to the coil terminals (A1/A2) and that the voltage level is within specification. Check for any breaks in the coil wiring.
Safety contacts do not close.
Ensure all connected safety input devices (e.g., emergency stop buttons, safety gates) are in their normal, safe state. Check the wiring of the input devices and the NC contacts of the relay.
Relay energizes, but output contacts remain open.
Confirm that the safety input circuit is correctly wired and has not been triggered. Check if the guided contact mechanism is obstructed or if there is an internal fault with the relay.
Intermittent operation or unreliable switching.
Inspect all wiring connections for tightness. Ensure the load being switched does not exceed the relay's maximum switching current and voltage ratings. Clean any dust or debris from the relay and surrounding area.
Pros and Cons
Pros
- High level of safety assured by guided contacts.
- Versatile contact configuration (4NO/2NC) for varied applications.
- Compliance with multiple critical industrial and safety standards.
- Durable contact material (AgSnO2+Au) for long service life.
- Compact DIN rail mountable design.
Cons
- Primarily designed for 24VDC coil voltage; requires appropriate power supply.
- Switching current rating is 5A for AC and 6A for DC, requiring attention to load type.
- Not suitable for direct use in high AC voltage switching applications without appropriate interface.
- May require integration with other safety components for complete safety circuits.
Setup, Compatibility & Care
Setup:
- Mount the module securely onto a standard 35mm DIN rail.
- Connect the 24V DC control voltage to the coil terminals (typically A1/A2).
- Wire the safety inputs (e.g., safety switches, light curtains) to the normally closed (NC) inputs.
- Connect the safety outputs (4 normally open contacts) in series with the control circuit of the machine or system you need to make safe.
- Wire the auxiliary contacts (2 normally closed) for status monitoring as needed.
Compatibility:
- Coil Voltage: Designed for 24V DC. Ensure your power supply meets this specification.
- Switching Loads: Suitable for loads up to 6A DC and 5A AC. Verify that your connected loads do not exceed these limits.
- Standards: Fully compliant with EN 13849-1, EN 61373, EN 50155, and UNI 11170-3. This ensures interoperability and safety in regulated environments.
Care:
- Keep the module clean and free from dust and debris. Use a dry or slightly damp cloth for cleaning; avoid solvents.
- Ensure proper ventilation around the module, especially if installed in a crowded control panel.
- Periodically inspect wiring connections for tightness and signs of wear.