Description
Description
The Schneider Electric 140CRA21220 serves as a critical DIO (Distributed I/O) drop interface module within the Modicon Quantum automation platform. This module facilitates high-speed, deterministic communication between remote I/O drops and the primary controller. By managing data traffic across the S908 network, it ensures reliable signal transmission in demanding environments such as power generation, mining, and petrochemical processing. The unit is designed to maintain system integrity through robust line monitoring and fault isolation capabilities.
Features
- Dual coaxial communication ports for redundant network configurations.
- Seamless automatic switchover to the secondary path in under 1 ms if the primary line is compromised.
- Integrated front-panel address selection switches for simplified network configuration.
- Real-time diagnostic LED indicators for monitoring port synchronization, communication status, and power health.
- Galvanic isolation between field wiring and the internal bus to protect sensitive circuitry.
Applications
This interface module is engineered for large-scale distributed control systems that require high availability. It is commonly deployed in remote I/O racks where long-distance signal transmission and redundant cabling are necessary to prevent downtime in critical infrastructure.
Technical Specifications
| Model |
140CRA21220 |
| Series |
Modicon Quantum |
| Input Voltage |
24 VDC (19.2-30 VDC range) |
| Network Protocol |
S908 Distributed I/O |
| Communication Ports |
2 x Coaxial (75 Ohm F-connector) |
| Data Rate |
1.544 Mbps |
| Max Current Draw |
650 mA |
| Isolation |
500 VDC (1 minute) |
| Operating Temperature |
0 to 60 deg C |
| Storage Temperature |
-40 to 85 deg C |
| Relative Humidity |
5-95% non-condensing |
Installation Guidelines
- Ensure the power supply is disconnected before installing or removing the module from the rack.
- Use shielded coaxial cabling for S908 network connections to minimize electromagnetic interference (EMI).
- Verify that the address selection switches on the front panel match the intended configuration for the specific I/O drop.
- Mount the module in an environment that meets the specified operating temperature and humidity requirements.
- Ensure proper grounding of the rack assembly to maintain signal integrity and safety compliance.
FAQ
What is the primary function of the 140CRA21220?
This module acts as an interface between a remote I/O drop and the main Modicon Quantum processor, handling data exchange over the S908 network.
Does this module support network redundancy?
Yes, the 140CRA21220 features dual coaxial ports that allow for redundant cable routing, providing automatic failover if the primary communication path fails.
What is the typical current consumption?
The module requires a maximum of 650 mA at 24 VDC.
