Schneider KOS 202 TSX Communication Module

Technical Specifications

Parameter	Value
Brand	Schneider
Model	KOS 202
Category	TSX Compact Communication Module
Weight	0.48 lbs (0.22 kg)
Dimensions	3.9 x 3.1 x 2.5 inches
Component Count	86 discrete components
Network Protocol	Modbus RTU
Communication Speed	300 bps to 19.2 kbps
Ports	2 x RS-485
Connector Type	5-pin screw terminal
Node Capacity	31 slaves per port
Isolation	500V AC optical
Status LEDs	4 (Power, TX1, TX2, Fault)
Operating Voltage	5V DC from backplane
Current Draw	120 mA from 5V bus
Energy Storage	3 x 47µF capacitors
Temperature Range	0°C to 55°C
Wiring Type	Shielded twisted pair

Physical Construction and Component Layout

This KOS 202 TSX compact communication module measures 3.9 inches in height. Its width reaches 3.1 inches with a depth of 2.5 inches. The total weight comes to approximately 0.48 pounds. Manufacturers placed 86 discrete components on this compact PCB. These components include UART controllers, line drivers, optocouplers, and status LEDs. The board uses a two-layer design for simple construction.

Communication Specifications and Port Configuration

KOS 202 implements the Modbus RTU protocol for industrial networking. The module supports communication speeds from 300 bps up to 19.2 kbps. Two independent RS-485 ports provide separate network connections. Each port uses a 5-pin screw terminal for field wiring. Each RS-485 port supports up to 31 slave devices. The total node capacity reaches 62 devices across both ports. Optical isolation separates each port from the internal logic. This isolation withstands 500V AC for reliable protection. Consequently, the module connects to multiple Modbus networks simultaneously.

Status Indication and Power Requirements

The communication module features four LED indicators for diagnostics. A green Power LED shows the presence of backplane voltage. Two green TX LEDs blink during data transmission on each port. A red Fault LED illuminates when communication errors occur. The KOS 202 draws 120 milliamps from the 5V DC backplane. For energy storage, the module integrates three 47µF capacitors. These capacitors filter high-frequency noise from the power supply.

Application Use and System Integration

You will use this module in TSX Compact PLC systems. It connects PLCs to Modbus networks with multiple slave devices. The KOS 202 operates reliably from 0°C to 55°C ambient. For example, you can link drives, HMIs, and remote I/O stations. Automatic baud rate detection simplifies network configuration. Therefore, this compact communication module provides flexible Modbus connectivity for Schneider automation systems.