Eaton Z Bistable Relay - 265271 & Z-S230/SS
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Product Information
Full details
This Eaton Moeller Z-S230/SS impulse relay is designed for electricians and control system integrators who need reliable switching for AC circuits. Its key benefit is its bistable operation, allowing it to maintain its state without continuous power, saving energy. A potential caveat is its specific coil voltage requirement of 230V AC. This relay offers 2 make contacts, a 16A switching current rating, and easy DIN rail mounting, making it suitable for various industrial and building automation applications.
All features
| Series | Eaton Moeller |
|---|---|
| Model Part Number | 265271 Z-S230/SS |
| Brand | Eaton |
Extended Product Information
FAQs
What does 'bistable' mean for this relay?
Bistable means the relay has two stable states (on and off) and will remain in the last state it was switched to, even if the coil power is removed. It requires a pulse to change from one state to the other.
Can I use this relay with 120V AC or 12V DC?
No, this specific model (Z-S230/SS) is designed exclusively for a 230V AC coil voltage. Using other voltages will result in malfunction or damage.
How many devices can I control with the two contacts?
You can control two separate devices or circuits, provided their combined current draw does not exceed 16A at 250V AC per contact, and the total switching duty is appropriate for the relay.
What is the difference between a make contact and a break contact?
A make contact (normally open or NO) is open when the relay is in its default state and closes when the relay is energized or actuated. A break contact (normally closed or NC) is closed by default and opens when the relay is energized or actuated. This relay only has make contacts.
What is the function of the 'modular spacing'?
Modular spacing refers to the width of the relay in relation to standard modular units used in electrical enclosures. A width of 1 modular spacing means it occupies the space equivalent to one standard circuit breaker module, allowing for efficient use of space in control panels.
How do I reset the relay to its initial state?
The relay maintains its last state. To change its state, you need to apply another pulse to the 230V AC coil. If your application requires a specific reset action, it must be implemented in the control logic.
What is the AC input frequency requirement?
The relay is designed to operate with a 50 Hz AC input frequency for its coil voltage.
Troubleshooting
Relay does not switch state when a pulse is applied.
Verify the coil voltage is exactly 230V AC. Ensure the pulse duration is sufficient for the relay to actuate. Check that the input terminals are correctly wired and that the control circuit is live.
Contacts are not closing (no continuity).
Confirm the relay has received a valid actuation pulse. Check the wiring to the load circuit and ensure the switched voltage (250V AC max) is appropriate. Inspect the contacts for any obstruction or damage.
Relay remains energized (or stuck) after pulse is removed.
This is expected behavior for a bistable relay; it holds its state. If it fails to release when a reverse pulse (if applicable to the specific wiring) or power cycle is applied, check for faults in the control wiring or potential internal damage.
Overheating of the relay.
Ensure the load current does not exceed the 16A rating. Check for proper ventilation around the relay, especially if installed in a crowded enclosure. Verify the coil voltage is within the specified range.
Pros and Cons
Pros
- Energy-efficient due to bistable design, holding state without continuous coil power.
- Versatile with two independent make contacts for multiple control tasks.
- Standard 230V AC coil voltage is common in many electrical systems.
- Robust 16A switching capacity handles demanding loads.
- Compact 1-module width saves valuable space in control panels.
- Easy and secure installation on standard DIN rails.
Cons
- Requires a specific 230V AC supply for the coil; not compatible with other voltages without modification or a different model.
- Only provides normally open (NO) contacts; not suitable for applications requiring normally closed (NC) contacts.
- Bistable operation requires a pulse signal to change state, which differs from monostable relays.
- Operating temperature range is limited to -20°C to 45°C, potentially unsuitable for extreme environments.
Setup, Compatibility & Care
Setup:
- Ensure the power supply to the control circuit is de-energized before installation.
- Mount the relay securely onto a standard 35mm DIN rail.
- Connect the 230V AC coil voltage to the appropriate terminals (refer to wiring diagram on the device or manual).
- Wire the load circuits to the two 'make' (normally open) contacts.
- Apply a brief 230V AC pulse to the coil to switch the relay's state.
Compatibility:
- Compatible with standard 35mm DIN rail systems.
- Requires a stable 230V AC power source for the coil.
- Suitable for switching loads up to 250V AC and 16A.
- Ensure the ambient operating temperature is within the -20°C to 45°C range.
Care:
- Keep the relay clean and free from dust and moisture.
- Periodically check wiring connections for tightness and signs of corrosion.
- Avoid exposing the relay to excessive vibration or shock.