Schneider 140DAM59000C Discrete I/O Module – Remote Drop Adapter

The Schneider 140DAM59000C connects a Modicon Quantum local rack to remote I/O drops. This discrete I/O module serves as an S908 Remote I/O head adapter. You can use it to distribute I/O up to 2 kilometers from the main CPU. The unit supports both copper and fiber optic cable media.

Network and Communication Specifications

The Schneider 140DAM59000C uses the S908 Remote I/O protocol for deterministic scanning. This discrete I/O module supports up to 31 remote drops on a single network. You can place I/O up to 2 kilometers away using fiber optic media. The unit transmits data at a fixed 1.544 Mbps baud rate.

Physical Dimensions and Weight

This discrete I/O module weighs 0.42 kg for secure rack installation. The unit occupies a single slot in a Quantum chassis. Its height reaches 130 mm including the front connectors. You can insert the Schneider 140DAM59000C alongside Quantum CPU or I/O modules.

Interface and Connection Points

A BNC female connector handles coaxial cable for copper networks. For fiber optic networks, two ST connectors provide transmit and receive ports. The front panel includes eight diagnostic LEDs for network status monitoring. You will find a rotary switch for setting the drop address from 1 to 31. A second rotary switch selects the cable type (copper or fiber).

Energy Storage and Internal Circuitry

The Schneider 140DAM59000C stores minimal energy for signal buffering. Two small capacitors provide 22 µF of total storage for the communication controller. The module does not contain any battery for configuration retention. Instead, it reads all address settings from the rotary switches at power-up. Four optocouplers provide isolation between the backplane and network transceiver.

Component Layout and Construction

A dedicated RIO communication controller handles all S908 protocol management. The module includes a line driver and receiver for coaxial cable signals. You will find 68 resistors, 42 capacitors, and 12 integrated circuits on the board. The Schneider 140DAM59000C contains a DC-DC converter for internal power regulation. A metal shield covers the transceiver section for electromagnetic interference reduction.

Operational Use and System Integration

Transitioning to this module expands your Quantum I/O capacity dramatically. You can place remote drops near field devices for shorter wiring runs. The module works with 140XBP01000 remote I/O adapters at each drop. Use the Schneider 140DAM59000C for large conveyor systems, batch processes, or distributed pump stations. For best results, terminate both ends of coaxial cables with 75-ohm terminators.