6ES7322-1HF01-0AA0 SM322 Digital Output | 2A Relay | Siemens

Product Description

• 6ES7322-1HF01-0AA0 is a digital output module from Siemens.
• It belongs to the SIMATIC S7-300 series.
• This SM 322 unit has 8 relay outputs (optically isolated).
• Each relay handles 2 A at 24 V DC or 230 V AC.
• It uses a 20‑pin front connector and operates on 24 V DC.
• Compact size: 40 mm wide, 125 mm high, 120 mm deep.
• Weight is only approx. 190 g.

Technical Data (Tree Structure)

• Supply voltage
  • Rated value (DC): 24 V
• Input current
  • from supply voltage L+, max: 160 mA
  • from backplane bus 5 V DC, max: 40 mA
• Power loss
  • Typical: 3.2 W
• Digital outputs
  • Number: 8 (relay type)
  • Switching capacity (lamp load): max. 50 W
  • Output current for signal “1”: rated 2 A
  • Minimum load current for signal “1”: 5 mA
• Switching frequency
  • Resistive load: max. 2 Hz
  • Inductive load: max. 0.5 Hz
  • Lamp load: max. 2 Hz
  • Mechanical: max. 10 Hz
• Relay outputs
  • Rated coil supply (L+): 24 V DC / 110 mA
  • Operating cycles (at 2 A)
    • 230 V AC: 100,000
    • 120 V AC: 200,000
    • 24 V DC: 300,000
  • Contact switching capacity
    • Inductive load: max. 2 A (230 V AC / 24 V DC)
    • Resistive load: max. 2 A
• Cable length
  • Shielded: max. 1,000 m
  • Unshielded: max. 600 m
• Diagnostics
  • Alarms: no diagnostic alarm
  • Functions: no wire‑break, short‑circuit, fuse, or missing load detection
  • LED: green status indicator for each output
• Potential separation
  • Between channels: yes (in groups of 2)
  • Between channels and backplane bus: yes (optocoupler)
  • Isolation tested with 1500 V AC
• Connection
  • Requires 20‑pin front connector
• Dimensions & weight
  • Width: 40 mm
  • Height: 125 mm
  • Depth: 120 mm
  • Weight: approx. 190 g

Expert Review

• “This relay module is robust and simple. It handles 2 A per channel and works with AC or DC loads. The optical isolation protects your CPU. Perfect for low‑frequency switching tasks.” – Thomas R., Controls Engineer.

Manager’s Insight

• “For projects requiring many relay outputs, this module saves space and cost. The 300,000 cycle life at 24 V DC ensures long service. Quick 24‑hour shipping gets you running fast.” – Laura M., Product Manager.

Applications & Suitable Equipment

• Ideal for PLC systems: Siemens S7‑300 and ET 200M.
• Use with motor starters, solenoid valves, indicator lamps, and contactors.
• Works in industrial automation, conveyor systems, and packaging machines.
• Suitable for HVAC, water treatment, and material handling.

Comparison with Similar Models

• 6ES7322-1BL00-0AA0 – 32 DO, transistor, 24 V DC, 0.5 A.
• 6ES7322-1HH01-0AA0 – 16 DO, relay, 2 A, 2‑group isolation.
• 6ES7322-1BF01-0AA0 – 8 DO, transistor, 24 V DC, 2 A.

Frequently Asked Questions (FAQ)

• Can I use this module with AC loads?
  Yes, it supports 230 V AC at 2 A per relay.
• Does it have short‑circuit protection?
  No, this module does not include diagnostic functions. Use external fuses.
• What is the maximum switching frequency?
  For resistive loads, it is 2 Hz. For inductive, it is 0.5 Hz.
• How many operating cycles can I expect?
  At 24 V DC / 2 A, you get 300,000 cycles; at 230 V AC, 100,000 cycles.
• Is the front connector included?
  No, you need to order the 20‑pin connector separately.

Selection Guide (Experience-based)

• If you need high‑speed switching, choose a transistor output module.
• For mixed AC/DC loads, this relay module is the best choice.
• Check your load current – each output supports up to 2 A.
• Consider the total current from the backplane bus (max 40 mA).
• We offer a 12‑month warranty for peace of mind.
• We ship within 12‑24 hours via FedEx, UPS, or DHL.

Contact Information

• For inquiries: sales@powergearx.com
• WhatsApp: +86 18030005825

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