The **EASY-NT-RJ45** is a specialized communication adapter used primarily with ComAp controllers (such as the InteliLite or InteliGen series). It serves as a physical interface converter to enable network communication via standard Ethernet cables. --- ### 1. Key Technical Specifications | Component | Specification | | :--- | :--- | | **Interface Type** | RS485 to RJ45 (Ethernet form factor) | | **Connector A** | Plug-in terminal for RS485 (A, B, COM) | | **Connector B** | RJ45 Female Jack | | **Termination** | Built-in 120 $\Omega$ resistor (selectable) | | **Compatibility** | ComAp controllers and EASY-bus systems | --- ### 2. Internal Electronic Design The EASY-NT-RJ45 is more than just a mechanical plug; it contains specific circuitry to ensure signal integrity across a control network. #### A. RS485 Differential Signaling The core electronic function is to route the differential signals (Data+ and Data-) from the controller's serial bus into the specific pins of an RJ45 connector. This allows the use of inexpensive, shielded CAT5/CAT6 cabling for long-distance communication. #### B. Termination Resistor To prevent signal reflection (echoes) in a long daisy-chain network, the device typically includes a **120-ohm termination resistor**. * **Active:** Used if the adapter is at the very beginning or the very end of the communication line. * **Passive:** If the adapter is in the middle of a chain, the termination is usually disabled or bypassed. #### C. Pinout Mapping The adapter maps the standard RS485 pins to the RJ45 standard. While Ethernet uses 8 pins, the EASY-NT-RJ45 primarily utilizes: * **Pin 4 & 5:** Typically used for the differential pair. * **Pin 8:** Often used for the Common/Shield ground to reduce Electromagnetic Interference (EMI). --- ### 3. Application Use Case In industrial generator sets, the electronic integration follows this path: 1. **Controller:** The InteliLite controller generates RS485 serial data. 2. **EASY-NT-RJ45:** Converts the raw wire inputs into an RJ45 socket. 3. **Network:** Allows the connection of multiple controllers (CAN or RS485) or the connection of a remote monitoring plug (like the IB-Lite). --- ### 4. Wiring Diagram Representation ```text [ Controller Terminals ] [ EASY-NT-RJ45 ] [ Output ] (A) ----------------------- [ RS485 + ] (B) ----------------------- [ RS485 - ] ------> Standard RJ45 (COM) ---------------------- [ Ground ] Patch Cable ```