The Siemens SIMATIC S7-300 digital I/O module SM 323, article number 6ES7323-1BL00-0AA0, is a compact expansion module designed to add both digital inputs and digital outputs to S7-300 PLC systems. Operating on a 24 V DC supply, it provides a balanced mix of input and output channels for handling discrete control and monitoring signals in industrial automation environments.
The Siemens 6ES7323-1BL00-0AA0 module is used to expand the digital input and output capacity of SIMATIC S7-300 PLCs. It is commonly installed in machine control systems, production lines, material handling equipment, and process automation systems where reliable switching and monitoring of discrete signals is required.
| Depth | 120 mm |
| Digital inputs configurable | Yes |
| Digital outputs configurable | Yes |
| Explosion safety category for dust | None |
| Height | 125 mm |
| Input current at signal 1 | 7 mA |
| Number of digital inputs | 16 |
| Number of digital outputs | 16 |
| Output current | 0.5 A |
| Permitted voltage at input | -30 V |
| Permitted voltage at output | 0 V |
| Redundancy | Yes |
| Short-circuit protection, outputs available | Yes |
| Supply voltage DC | 20.4 V |
| Time delay at signal change | 4.8 ms |
| Type of digital output | Transistor |
| Type of output voltage | DC |
| Type of voltage (input voltage) | DC |
| Voltage type (supply voltage) | DC |
| Width | 40 mm |
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