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Johnson Controls C450SCN-3C Expansion Module
Expand your HVACR control system with the PENN System 450 Dual Relay Expansion Module. Designed to provide two additional SPDT relay outputs for compatible modular control applications.
C450SCN-3C 2 SPDT Relays System 450 Modular Design HVACR Control⚙️ Johnson Controls System 450 Expansion Module
The Johnson Controls C450SCN-3C is a dual-relay expansion module from the PENN System 450 modular electronic control family.
It adds two independent SPDT relay outputs to a compatible System 450 control assembly, providing additional switching capacity without replacing the entire control system.
System 450 technology supports a variety of temperature, pressure and humidity control applications, making this expansion module suitable for properly configured HVACR and industrial control systems.
Two relay outputs, modular expansion, compact installation and the flexibility to expand an existing compatible control assembly according to application requirements.
📋 Technical Specifications
| Specification | Description |
|---|---|
| Brand | Johnson Controls / PENN |
| Model | C450SCN-3C |
| Series | System 450 |
| Product Type | Relay Output Expansion Module |
| Number of Outputs | 2 |
| Relay Configuration | 2 × SPDT Dry-Contact Relays |
| External Supply | 24 VAC (20–30 VAC), 50/60 Hz |
| Internal Supply Option | Compatible C450YNN-1C System 450 Power Module |
| Maximum Power Consumption | 1.2 VA |
| Non-Inductive Contact Rating | 10 A at 24/240 VAC |
| Motor Contact Rating | 1/2 HP at 120/240 VAC |
| Ambient Operating Temperature | -40°C to +66°C |
| Operating Humidity | Up to 95% RH, non-condensing; maximum dew point 29°C |
| Dimensions (H × W × D) | 127 × 61 × 61 mm |
| Approximate Weight | 186 g |
| Mounting | DIN Rail or Direct Surface Mounting |
⭐ Key Features & Benefits
💰 Practical Value for HVACR Control Systems
The C450SCN-3C offers a practical way to expand a compatible System 450 installation when additional relay outputs are required.
Instead of replacing an existing compatible System 450 controller, users can expand their control system by adding the required relay outputs.
🏭 Typical Applications
When integrated with a suitable System 450 control module and compatible sensors, the C450SCN-3C can provide additional switching outputs for applications such as:
🔧 Installation & Selection Guide
Confirm Compatibility
Verify compatibility with the existing System 450 control module and revision.
Confirm Power Supply
Use the correct 24 VAC supply arrangement or compatible power module.
Check Relay Loads
Confirm that connected electrical loads are within the specified relay ratings.
Configure the System
Set up and verify the additional outputs through the compatible System 450 control module.
The C450SCN-3C is an expansion module, not a standalone controller. It requires a compatible System 450 control module and suitable power supply arrangement. Do not connect internal and external power sources simultaneously. Always follow the manufacturer's installation and electrical safety instructions.Johnson Controls Expansion Module Supplier Malaysia
RNA Engineering & Trading Sdn Bhd supplies Johnson Controls / PENN control components for commercial refrigeration and HVACR applications.
Enquire about the Johnson Controls C450SCN-3C System 450 Dual Relay Expansion Module for pricing, stock availability and product selection.
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