How to Wire the TCN4S-14RV Temperature Controller with AC Contactor: A Step-by-Step Guide

Wiring a temperature controller correctly is crucial for ensuring stable operation and prolonging equipment life. In this post, we'll walk you through how to wire the TCN4S-14RV temperature controller using AC contactor connection (Relay Output Mode), which is ideal for high-load equipment exceeding 1000W.

• Why Use AC Contactor Wiring Mode?

The TCN4S-14RV supports two output types: relay contact and solid-state relay (SSR). However, only one output mode can be used at a time. When the load exceeds 1000W, relay output must be used with an AC contactor to avoid damage or overheating of the internal relay.

• Wiring Instructions for TCN4S-14RV (Relay Output Mode)

Here's how to connect your temperature controller safely and efficiently:

1. Power Supply (①②)

• Connect ① and ② to 220V AC power.
  
• ① = Live wire
  
• ② = Neutral wire
  

2. Relay Contact Short Circuit (②③)

• Create a short circuit between terminal ② and ③.
  

3. Relay Output to Contactor (④)

• Terminal ④ connects to contactor coil A2 (signal line).
  
• Terminal ③ connects to contactor coil A1 (power line).
  

4. Output Device Wiring (A1, A2)

• A1 and A2 are the AC contactor coil terminals.
  
• Connect L2 from the contactor to the live wire.
  
• Connect L3 to the neutral wire.
  
• Connect T2/T3 to the load output device.
  

5. Thermocouple Connection (⑨⑩)

• Use K-type thermocouple:
  - Blue wire → Terminal ⑨
  - Red wire → Terminal ⑩
  
• If using a 3-wire RTD (PT100 / Cu50), connect the red wire to ⑧, and the other two to ⑨⑩.
  

• Important Notes
  - Ensure SSR and relay outputs are not used at the same time.
  - Relay mode is recommended for loads above 1000W.
  - Double-check wiring before powering on to prevent short circuits or misfire.
  

• Applications

The TCN4S-14RV temperature controller with relay output and AC contactor is widely used in:

• Heating systems
  
• Plastic machinery
  
• Textile ovens
  
• Industrial incubators
  
• Food processing equipment
  

• Wiring Diagram Overview

The product's side panel provides a clear, color-coded wiring diagram, simplifying installation even for non-professional users. With labeled terminals and step-by-step instructions, setup becomes faster and safer.

• Conclusion

Whether you're managing industrial temperature control or maintaining commercial equipment, the TCN4S-14RV with AC contactor connection is a reliable solution for high-power applications. Just follow the wiring diagram and recommendations to ensure safe and efficient performance.

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