Siemens 6ES7323-1BL00-0AA0 SM 323 | 16DI/16DO | S7-300 Module

Product Overview

• 6ES7323-1BL00-0AA0 – SIMATIC S7-300 digital module SM 323.
  • Optically isolated, 16 digital inputs and 16 digital outputs.
  • Rated at 24V DC, 0.5A per output, total current 4A.
  • 1x 40-pin connector.
• Supply voltage:
  • Rated: 24V DC.
  • Range: 20.4V to 28.8V DC.
• Current consumption:
  • From load L+ (no load): max. 80 mA.
  • From backplane bus: max. 80 mA.
• Power loss: typical 6.5 W.

Digital Inputs (16 channels)

• Type: 1 according to IEC 61131.
  • Simultaneously controllable:
    • Up to 40°C: 16 inputs.
    • Up to 60°C: 8 inputs.
  • Input voltage: 24V DC (rated).
  • Input current: typical 7 mA (at signal “1”).
  • Input delay (0→1 / 1→0):
    • Min. 1.2 ms, max. 4.8 ms.
• Cable length:
  • Shielded: max. 1000 m.
  • Unshielded: max. 600 m.

Digital Outputs (16 channels)

• Short-circuit protected, can drive digital inputs.
  • Lamp load: max. 5 W.
  • Load resistance: 48 Ω to 4 kΩ.
• Output current:
  • Nominal: 0.5 A.
  • Min. load: 5 mA, max. 0.6 A (0–60°C).
  • Residual current (signal “0”): max. 0.5 mA.
• Output delay (resistive load):
  • 0→1: max. 100 µs.
  • 1→0: max. 500 µs.
• Parallel switching: not for uprating, only for redundancy.
• Switching frequency:
  • Resistive: 100 Hz.
  • Inductive: 0.5 Hz.
  • Lamp: 100 Hz.
• Total current per group (horizontal):
  • Up to 40°C: 4 A.
  • Up to 60°C: 3 A.
• Cable length: same as inputs (shielded 1000 m / unshielded 600 m).

Connectivity & Diagnostics

• Encoders: 2-wire sensors supported (quiescent current ≤1.5 mA).
• Isochronous mode: not supported.
• Alarms and diagnostics: not available.
• Status LEDs: green for each input and output channel.

Galvanic Isolation

• Digital inputs: isolated between channels (groups of 16) and backplane bus.
• Digital outputs: isolated between channels (groups of 8) and backplane bus.

Dimensions & Weight

• Width: 40 mm, Height: 125 mm, Depth: 120 mm.
• Weight: approx. 260 g.

Expert Review

• “This SM 323 module is a workhorse for S7-300 systems. It handles mixed I/O with no fuss. The 0.5A outputs drive relays and small solenoids reliably. A cost-effective choice for discrete automation.” – Senior Controls Engineer.

Manager’s Insight

• “We use this module in many standard cabinets. The 16/16 mix saves space. Its wide temperature range and isolation make it safe for factory floor use. Great value for general-purpose I/O.” – Automation Product Manager.

Applications

• Conveyor systems and material handling.
• Packaging machines and palletizers.
• HVAC and building automation.
• Small to medium PLC panels.

Comparison with Similar Models

• 6ES7322-1BL00-0AA0 (only outputs, no inputs)
• 6ES7321-1BL00-0AA0 (only inputs, no outputs)
• 6ES7323-1BH00-0AA0 (different I/O count)

Professional FAQ

• Q: Can I connect 2-wire sensors directly?
  • A: Yes, the module supports 2-wire sensors with a max quiescent current of 1.5 mA.
• Q: What is the maximum cable length?
  • A: 1000 m shielded, 600 m unshielded for both inputs and outputs.
• Q: Does this module have diagnostic alarms?
  • A: No, it does not support diagnostic interrupts.
• Q: Can I use it in a 60°C environment?
  • A: Yes, but derate outputs to 3 A total and inputs to 8 simultaneous.
• Q: Is the module isolated from the backplane?
  • A: Yes, both inputs and outputs are isolated from the backplane bus.

Selection Guide

• Choose this module if you need equal numbers of inputs and outputs (16 each).
• For higher output current, consider 6ES7322 series.
• Check your total group current – do not exceed 4A (40°C) or 3A (60°C).
• 12-month warranty against defects.
• We ship in 12–24 hours via FedEx, UPS, or DHL.

Contact Information Inquiries:
Email: sales@powergearx.com
WhatsApp: +86 18030005825

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