Siemens C79458-L2363-A1 Expansion Module for SIMATIC Systems

The Siemens C79458-L2363-A1 expands the I/O capacity of SIMATIC automation systems. You can connect this module remotely via the system bus interface. It adds eight digital inputs and four digital outputs to your configuration. This expansion suits distributed control applications with space constraints.

Technical Specifications and Hardware Layout

This expansion module measures 120 mm in height. Its width reaches 55 mm, and the depth equals 85 mm. The Siemens C79458-L2363-A1 weighs approximately 0.32 kilograms. A single internal PCB holds all input filtering and output driving circuits. The module provides eight 24 V DC input channels for field sensors. Additionally, it delivers four relay output channels for actuator control. The unit stores no energy in capacitors or batteries. One 20-pin front connector handles all field wiring connections.

Input and Output Electrical Ratings

The Siemens C79458-L2363-A1 accepts input voltages from 0 V to 30 V DC. Each input draws a typical current of 6 mA at 24 V DC. The module filters input transitions with a 2 ms hardware delay. For outputs, each relay channel switches 2 A at 250 V AC or 30 V DC. The total output current per module reaches 8 A maximum. Consequently, this module drives small contactors and solenoid valves reliably. Relay contacts include silver-alloy material for extended service life.

Bus Connection and Installation Guidelines

You must connect this module using the dedicated system bus cables. Transitioning to addressing, the CPU automatically assigns I/O positions. Two front LEDs indicate power status and bus communication activity. You can mount this unit up to 50 meters away from the main PLC. The operating temperature range extends from -20°C to +55°C reliably.