Schneider Electric Bistable Relay - iTL
Best current price£31.46from Tameson UK
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Product Information
Full details
The Schneider Electric iTL Impulse Relay (MPN: A9C30111) is designed for efficient control of lighting circuits using pushbuttons. It's ideal for electricians and system integrators managing residential or commercial lighting where on/off control via multiple momentary switches is needed. The primary benefit is its bistable operation, meaning it consumes zero energy once the state is set, leading to cost savings and reduced heat. A potential caveat is that it requires a momentary impulse to change state, so it's not suitable for applications needing continuous control signals.
All features
| Series | iTL |
|---|---|
| Model Part Number | A9C30111 |
| Brand | Schneider Electric |
Extended Product Information
FAQs
What is a bistable impulse relay?
A bistable impulse relay is a type of relay that toggles between two stable states (on/off) each time it receives a momentary electrical pulse to its control coil. It remains in the last state without consuming power until the next pulse arrives.
Can I use this relay with a standard light switch?
No, this relay requires a momentary (non-latching) pushbutton. A standard light switch typically maintains its contact, which is not compatible with the impulse nature of this relay and could lead to damage.
What types of lamps can I control with this relay?
The iTL impulse relay is suitable for controlling incandescent lamps, low-voltage halogen lamps, fluorescent lamps, and discharge lamps.
How many pushbuttons can I connect?
You can connect an unlimited number of pushbuttons in parallel to the control coil of the iTL relay.
What are the available coil voltages?
The Schneider Electric iTL impulse relay (A9C30111) has a coil that can operate with either 12V DC or 24V AC.
Does this relay consume power when the light is on?
No, once the relay has switched to the 'on' state, it consumes zero energy because it is bistable. It only requires a brief pulse to change its state.
What is the IP rating of this relay?
The IP rating for this relay is IP20, meaning it is protected against solid objects larger than 12.5mm (like a finger) but offers no protection against water ingress.
Troubleshooting
Relay does not switch when a button is pressed.
Verify the control voltage is correctly applied to the coil (12V DC or 24V AC). Check all pushbutton and coil wiring connections for continuity and proper termination. Ensure the correct type of momentary pushbutton is used.
Relay switches continuously without input.
Check for short circuits in the pushbutton wiring or unintended voltage on the coil terminals. Ensure the manual override switch is not engaged.
Load circuit does not power on when relay is activated.
Confirm the load circuit is correctly wired through the NO contact. Check the load itself for faults. Measure voltage at the output of the NO contact when the relay is energized.
Relay hums or makes noise.
This could indicate an incorrect or unstable control voltage. Ensure the supplied voltage is within the specified range (12V DC or 24V AC) and is stable. Check for loose internal connections if the issue persists.
Pros and Cons
Pros
- Energy efficient due to bistable operation (zero energy consumption in steady state).
- Flexible control options with support for numerous pushbuttons.
- Reliable switching for various lighting types.
- Compact design for easy integration into standard electrical panels.
- Manual operation provides a failsafe and testing capability.
- Compatible with both AC and DC control signals.
Cons
- Requires a momentary impulse to change state; not for continuous control.
- Only provides one Normally Open (NO) contact.
- Requires careful wiring to avoid unintended switching.
- Coil voltage must match one of the specified types (12V DC or 24V AC).
Setup, Compatibility & Care
Setup:
- Mounting: Securely attach the iTL relay to a standard 35mm DIN rail within your electrical enclosure.
- Wiring Power: Connect the control voltage to the relay coil terminals. Ensure the voltage supplied matches either the 12V DC or 24V AC specification. Incorrect voltage can damage the coil.
- Wiring Control Circuit: Connect your pushbuttons (momentary type) in parallel to the coil terminals. Any number of pushbuttons can be wired in this manner.
- Wiring Load Circuit: Connect the circuit you wish to control (e.g., lighting) through the relay's Normally Open (NO) contact. The input power goes to one side of the contact, and the output goes to your load.
- Manual Operation: Use the integrated manual switch for testing or direct control.
Compatibility:
- Pushbuttons: Compatible with standard momentary (non-latching) pushbuttons.
- Lamp Types: Suitable for incandescent, low-voltage halogen, fluorescent, and discharge lamps.
- Control Voltage: Requires either 12V DC or 24V AC. Ensure your power source matches.
- Enclosure: Designed for standard electrical enclosures with DIN rail mounting.
Care:
- Cleaning: Keep the unit clean by wiping with a dry or slightly damp cloth. Avoid abrasive cleaners or solvents.
- Ventilation: Ensure adequate ventilation around the relay within the enclosure to prevent overheating.
- Inspection: Periodically inspect wiring for secure connections and signs of wear.