Altronix RBSN DPDT Relay Module 12/24VDC
The Altronix RBSN is a dual-pole, dual-throw relay module engineered for 12VDC or 24VDC operation in security and access control systems. This compact relay delivers two independent output circuits, enabling flexible switching logic for alarm signal routing, gate controls, and auxiliary device activation across a wide range of power infrastructure and security integrations.
Key Features
- DPDT Configuration (2 Independent Outputs): Dual-pole, dual-throw design means you get two separate switch circuits in one module — allows simultaneous control of different devices or the same device through different logic paths without adding extra relays.
- Selectable 12VDC or 24VDC Coil Voltage: Choose your operating voltage at installation. No need to stock different part numbers for mixed-voltage deployments — one RBSN adapts to your existing power infrastructure.
- Handles Up to 1A @ 120VAC or 2A @ 28VDC Output: The relay can switch moderate AC and DC loads. 1 amp at 120VAC is sufficient for solenoid strikes, bell circuits, and relay coils. 2 amps at 28VDC covers low-voltage door locks and auxiliary control outputs — real-world amperage, not marketing-speak.
- Sensitive Relay Design: Minimal input current draw reduces strain on alarm panel outputs and control circuits. Matters when you're pulling trigger signals from aged or capacity-constrained access control boards.
- Compact Form Factor: Small footprint fits into standard alarm panel enclosures and DIN-rail installations without consuming excessive real estate.
- Lifetime Limited Warranty: Altronix backs the RBSN with a lifetime warranty against manufacturing defects — standard terms apply.
Integration & Compatibility
The RBSN integrates into any control circuit that provides a 12VDC or 24VDC input signal — typical sources include alarm system outputs, access control reader relays, and motion detector triggers. Accepts both 12VDC and 24VDC, so you can deploy it in mixed-voltage security environments without special adapters. The dual-throw configuration allows you to wire normally-open or normally-closed contacts depending on your logic — switch loads on activation or fail-safe them off.
Common deployment patterns: routing alarm events to multiple sirens or strobes, controlling gate strike relays from two independent sensor inputs, or switching auxiliary devices based on reader output. The RBSN does not include built-in surge protection — if switching inductive loads (motor-driven gates, solenoids), pair it with a relay module surge suppressor or diode clamp to protect against back-EMF.
When to Choose a Different Model
If you need higher switching current — above 2A @ 28VDC or 1A @ 120VAC — or if you require more than two independent circuits, look for a higher-capacity relay module in the Altronix power and switching family. If your application involves AC line voltage (240VAC or 480VAC three-phase), you will need an industrial-grade contactor, not a small relay module. The RBSN is sized for low-voltage security and alarm work, not heavy industrial switching.
Frequently Asked Questions
Q: Can the RBSN be used with both 12VDC and 24VDC in the same installation?
A: Yes. The coil voltage is selectable at installation — you choose 12VDC or 24VDC during wiring. If you have mixed-voltage environments, you would install multiple RBSN modules, each configured to its respective voltage supply.
Q: What is the maximum output current for AC and DC loads?
A: The RBSN handles up to 1A @ 120VAC (alarm bells, strobes) or 2A @ 28VDC (door strikes, solenoid coils). Do not exceed these ratings — it will shorten relay life or cause failure.
Q: Do I need surge protection when switching solenoid locks or motor loads?
A: Strongly recommended. Inductive loads generate back-EMF when de-energized. A suppressor diode or RC snubber across the load protects the RBSN contacts from arcing and premature wear.
Q: Is the RBSN suitable for fire alarm applications?
A: The RBSN is a general-purpose relay for security and access control. Fire alarm code compliance depends on your jurisdiction and the specific circuit. Verify with your local authority having jurisdiction and your alarm system manufacturer before using in listed fire alarm circuits.
Q: What is the warranty coverage on the RBSN?
A: Altronix provides a Lifetime Limited Warranty against manufacturing defects. Standard exclusions apply (physical damage, misuse, improper installation).
Jerry TildsenPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
The Altronix RBSN is a workhorse in any alarm panel retrofit or mixed-voltage security build. Its dual-pole, dual-throw design and selectable 12/24VDC coil voltage mean you can adapt it to almost any existing infrastructure without redesign. The sensitive relay design is a real win when you're working with older panel outputs that don't have much current to spare.
Technical Highlights:
- DPDT Configuration: Two independent switch circuits eliminate the need to stack multiple relays for parallel or switched-logic control. One module can route an alarm event to both a bell circuit and a strobe, or handle two separate sensor inputs driving the same lock relay.
- 1A @ 120VAC / 2A @ 28VDC Output Rating: Sufficient for standard alarm loads (solenoid strikes pulling 0.5–1.5A, bell circuits at 0.3–1A). Do not underestimate the importance of these ratings — exceeding them will cause contact wear and cascading failures in the field.
- Selectable Coil Voltage: A single SKU handles both 12VDC and 24VDC deployments. In mixed-voltage environments where some circuits run 12V and others 24V, you stock one part number and configure at installation.
Deployment Considerations:
- Always add a suppressor diode or RC snubber across inductive loads (solenoids, motor-driven strikes). Back-EMF will pit and eventually weld relay contacts if left unprotected.
- The RBSN is rated for alarm and access control circuits, not heavy industrial switching or line-voltage AC. Do not use it to switch 240VAC or 480VAC equipment.
- Input signal current draw is minimal — safe to pull from aged control board outputs, but verify the source can deliver at least 50mA to reliably energize the coil under worst-case voltage sag conditions.
Deploy the RBSN when you need reliable dual-throw switching in a retrofit or new-build alarm system, especially where mixed 12/24VDC infrastructure is in play. It is not a replacement for industrial contactors, and it should never be your first choice for switching high AC currents — but for security, access, and gate control, it is solid and battle-tested.
