Einführung
This manual provides essential information for the safe and effective use of the Idec RH4B-UAC120V Power Relay. This device is designed for reliable electrical switching applications, featuring a 4PDT contact configuration and operating on a 120VAC coil voltage. Please read this manual thoroughly before installation and operation.
Sicherheitsvorkehrungen
Beachten Sie stets die folgenden Sicherheitsvorkehrungen, um Stromschläge, Brände oder Schäden am Produkt zu vermeiden:
- Vor Installation, Verkabelung oder Wartungsarbeiten muss die Stromzufuhr unterbrochen sein.
- Sämtliche Verkabelungsarbeiten müssen von qualifiziertem Fachpersonal gemäß den örtlichen Elektrovorschriften durchgeführt werden.
- Überschreiten Sie nicht das angegebene Volumentage und Stromstärken.
- Avoid installing the relay in environments with excessive moisture, dust, corrosive gases, or vibrations.
Setup und Installation
The RH4B-UAC120V Power Relay is designed for socket mounting. Follow these general steps for installation:
- Montage: Securely mount the appropriate relay socket (not included) in a stable location, typically on a DIN rail or panel.
- Verdrahtung: Connect the control circuit to the coil terminals and the load circuit to the contact terminals. Refer to the wiring diagram provided with your relay socket or system documentation for specific pin assignments. Ensure all connections are tight and secure.
- Einfügung: Carefully insert the RH4B-UAC120V relay into its socket, ensuring all pins align correctly with the socket terminals. Apply gentle, even pressure until the relay is fully seated.
- Überprüfung: Before applying power, double-check all wiring connections for correctness and ensure no loose strands or short circuits are present.

Figure 1: Idec RH4B-UAC120V Power Relay. This image shows the compact design of the relay with its transparent casing, revealing the internal contacts and coil, and the multiple pins for socket connection at the base.
Bedienungsanleitung
The RH4B-UAC120V Power Relay operates automatically based on the presence or absence of voltage across its coil terminals. It functions as a switch to control higher power circuits or to provide isolation between control and load circuits.
- Coil Activation: When 120VAC is applied to the relay's coil, an electromagnetic field is generated, causing the internal contacts to switch their state.
- Kontaktschaltung: The 4PDT (Four Pole Double Throw) configuration means the relay has four independent sets of contacts, each capable of switching between two positions (normally open to closed, or normally closed to open).
- Deaktivierung: When the 120VAC supply to the coil is removed, the electromagnetic field collapses, and the contacts return to their original (de-energized) state.
Ensure the load connected to the contacts does not exceed the 10 Amps current rating to prevent damage to the relay and connected equipment.
Wartung
The RH4B-UAC120V Power Relay is designed for long-term reliability with minimal maintenance. However, periodic inspection is recommended to ensure optimal performance and longevity.
- Sichtprüfung: Regularly check the relay and its socket for any signs of physical damage, discoloration, or loose connections.
- Umweltcheck: Stellen Sie sicher, dass die Betriebsumgebung innerhalb der vorgegebenen Bedingungen bleibt (Temperatur, Luftfeuchtigkeit, Abwesenheit korrosiver Substanzen).
- Reinigung: If dust or debris accumulates, gently clean the exterior of the relay and socket using a soft, dry cloth. Do not use solvents or abrasive cleaners.
- Kontaktlebensdauer: Relays have a finite number of switching cycles. If the relay is used in a high-frequency switching application, consider periodic replacement based on manufacturer's recommendations or observed performance degradation.
Fehlerbehebung
If the RH4B-UAC120V Power Relay does not function as expected, consider the following common issues and solutions:
| Problem | Mögliche Ursache | Lösung |
|---|---|---|
| Relay does not energize (contacts do not switch) |
|
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| Contacts do not switch reliably or chatter |
|
|
| Relais überhitzt |
|
|
If problems persist, consult a qualified electrician or contact Idec technical support.
Technische Daten
| Attribut | Wert |
|---|---|
| Modellnummer | RH4B-UAC120V |
| Marke | Idec |
| Kontakttyp | 4PDT (Four Pole Double Throw) |
| Aktuelle Bewertung | 10 Amps |
| Spule Voltage | 120 Volt AC |
| Betriebsmodus | Automatisch |
| Hersteller | IDEC |
| Abmessungen (ungefähr) | 27.5 x 41 x 42 mm |
Garantie und Support
For information regarding warranty coverage, technical support, or service, please refer to the official Idec website or contact your authorized Idec distributor. Keep your purchase receipt as proof of purchase.
Idec Official WebWebsite: https://us.idec.com/





