Product Overview
The Schneider Electric 140NOM21200C is a DIO head-end adaptor from the Modicon Quantum series, designed to streamline communication in distributed industrial automation systems. It provides essential connectivity for remote I/O drops, enabling efficient data exchange between controllers and field devices. With support for two Modbus RS-485 interfaces and one Modbus RS-232 interface, this module ensures robust and flexible network integration.
Technical Specifications Breakdown
Key parameters for the 140NOM21200C are listed below for quick reference:
| Feature | Specification |
|---|---|
| Manufacturer | Schneider Electric |
| Product Type | DIO head-end adaptor |
| Product Line | Modicon Quantum |
| Part Number | 140NOM21200C |
| Interfaces | 2 Modbus RS-485, 1 Modbus RS-232 |
| Transmission Rate | 1 Mbps |
| I/O Words | 30 I/32 O |
| Power Dissipation | 4 W |
| Bus Current Requirement | 780 mA |
| Ambient Temperature | 0 to 60 °C |
| Humidity | 95 % without condensation |
| Operating Altitude | <= 16404.2 ft (5000 m) |
| Protective Treatment | Conformal coating |
| Resistance to Electrostatic Discharge | 4 kV contact, 8 kV on air |
| Standards | UL 508 |
Industry Applications
This adaptor excels in applications requiring reliable remote I/O communication, such as water treatment plants and material handling systems. Its dual RS-485 interfaces allow for redundant network topologies, reducing downtime risks. The 1 Mbps transmission rate supports fast data updates for 30 input and 32 output words, making it suitable for medium-scale process control.
Installation & Setup Guidance
Mount the 140NOM21200C in a Quantum backplane and connect the RS-485 ports using twisted-pair copper cables. Ensure the bus current requirement of 780 mA is met by the power supply. For RS-232, use a dedicated serial cable. Configure the transmission rate to 1 Mbps via the Modbus network settings. Verify all connections before powering the system.
Maintenance & Reliability
The conformal coating protects against moisture and contaminants, extending service life in harsh environments. Operate within 0 to 60 °C and humidity up to 95% without condensation. Inspect connectors periodically for corrosion. The module withstands electrostatic discharge up to 8 kV on air, reducing failure risks during maintenance.
Compatibility & Integration
This adaptor integrates with Modbus RTU networks. It is compatible with Schneider Electric remote I/O modules such as 140CRA21210 and 140CRA21220. The dual RS-485 ports support daisy-chain or star topologies, while the RS-232 port enables direct connection to programming devices.
Selection Guide & Purchasing Advice
When selecting a DIO head-end adaptor, verify that the bus current and I/O word count match your system requirements. The 140NOM21200C offers a balanced feature set for medium-density applications. SpareTechPLC stocks this module with fast shipping and expert support. Please verify current lifecycle status and availability with SpareTechPLC before ordering.
Troubleshooting & Common Issues
If communication fails, check the RS-485 cable termination and ensure the bus current is sufficient. Verify that the transmission rate matches all devices. For RS-232 issues, confirm cable pinout and signal levels. If the module does not power on, inspect the backplane connection and power supply capacity.
