ZM15001X EATON

ZM15001X  EATON Termination Unit

Product  Description：

An EATON Termination Unit, often called a network terminator or end-of-line resistor, is a passive electrical component crucial for maintaining the quality of data communication signals in bus topologies, such as CANopen, PROFIBUS, DeviceNet, or simple multi-drop RS-485 networks. The unit is typically a resistor network engineered to match the characteristic impedance of the communication cable (e.g., $120 \text{ \Omega}$ for CAN/RS-485). By placing the termination unit at the physical ends of the communication bus segment, it absorbs signal energy, preventing it from reflecting back onto the cable. These reflections, if not terminated, can interfere with the original signal and cause intermittent or total communication failures between control devices (PLCs, HMIs, sensors, etc.). EATON offers these units in various form factors, including screw-in connectors, integrated terminal blocks, or dedicated accessory modules.

Product Parameters

The specific parameters of EATON Termination Units depend heavily on the intended network protocol and application:

• Resistance Value (Impedance Matching): Typically $120 \text{ \Omega}$ for RS-485 and CAN-based networks, or other values as specified by the fieldbus standard.

• Power Rating: Varies, but generally low (e.g., $0.25 \text{ W}$ or $0.5 \text{ W}$) as it only handles signal voltage/current.

• Maximum Bus Voltage: Rated for the voltage level of the communication line (e.g., $5 \text{ V}$ or $24 \text{ V}$).

• Connection Type: May be an integrated RJ-45 connector, a D-sub connector, or a screw-type terminal block.

• Mounting: Often designed for DIN rail mounting or direct mounting onto the host device/cable.

• Operating Temperature: Designed for harsh industrial environments, typically $-20^{\circ}\text{C}$ to $+60^{\circ}\text{C}$.

Product Advantages

EATON Termination Units provide distinct advantages in industrial networking:

• Enhanced Signal Integrity: They are crucial for eliminating signal reflections, which is the leading cause of communication errors and dropped packets in bus networks.

• Increased Network Reliability: By ensuring clean data transmission, they dramatically improve the overall stability and uptime of the industrial control system.

• Simple, Passive Solution: They are easy to install and maintain as they require no external power or complex configuration, offering a robust and long-lasting solution.

• Broad Compatibility: EATON provides termination solutions compliant with major industrial communication standards, allowing for seamless use with their own and third-party control equipment.

• System Troubleshooting Simplification: The correct use of termination units often simplifies the process of diagnosing network faults, as communication issues are less likely to be signal-reflection related.

Important Considerations (Precautions)

Proper application of the Termination Unit requires careful attention to the following:

• Placement is Critical: The unit must only be installed at the two physical ends of the bus segment, not in the middle. Incorrect placement (e.g., terminating a drop line) will disrupt communication for the entire bus.

• Matching Impedance: Ensure the resistance value of the termination unit exactly matches the characteristic impedance of the communication cable and the network standard being used. Using an incorrect value can still lead to reflections or signal attenuation.

• Power and Ground: For active termination (if used), ensure proper wiring for the required power and ground connections. Passive termination units only require connection to the data lines.

• Cable Quality: The effectiveness of termination relies on using high-quality, twisted-pair communication cable that meets the specifications of the network protocol.

• Only Two Terminations: A standard bus segment must have exactly two termination units; installing more or fewer than two will negatively impact network performance.

Product Applications

EATON Termination Units are essential in various applications where industrial communication buses are deployed:

• Automated Manufacturing: Used on DeviceNet or CANopen networks to reliably link PLCs, sensors, drives, and safety devices across long production lines.

• Building Management Systems (BMS): Applied in Modbus RTU or BACnet MS/TP networks to ensure clear communication between controllers, meters, and HVAC components.

• Machine Control: Integrated into high-speed machine controllers (e.g., packaging or printing) where fast, reliable signal exchange is non-negotiable for synchronized operation.

• Remote I/O Systems: Used in systems with distributed I/O modules connected over a fieldbus in electrically noisy industrial environments.

• Transportation and Rail: Applied in vehicle or rail systems using CAN bus to maintain data integrity across the vehicle's network backbone.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

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