Digital Output Module 16 DQ Relay

The Siemens 6ES7322-1HH01-0AA0 is a Digital Output Module (SM 322) for the SIMATIC S7-300 series, featuring 16 optically isolated relay contact outputs. This module is designed for flexible and robust digital control in industrial automation, supporting both AC and DC load voltages up to 230 V AC / 120 V DC per output.

• Outputs: 16 digital outputs, relay contacts, optically isolated in groups of 8

• Output Voltage:

  • AC: Up to 230 V

  • DC: Up to 120 V

• Output Current: 2 A per output (rated value)

• Minimum Load Current: 10 mA per output

• Maximum Aggregate Current: 8 A per group (16 outputs total)

• Switching Capacity:

  • Lamp load: Max. 50 W at 230 V AC

  • Resistive load: Max. 2 A at 230 V AC or 24 V DC

  • Inductive load: Max. 2 A at 230 V AC or 24 V DC

• Switching Frequency:

  • Resistive load: Max. 1 Hz

  • Inductive load: Max. 0.5 Hz

  • Lamp load: Max. 1 Hz

  • Mechanical: Max. 10 Hz

• Number of Operating Cycles:

  • 100,000 (general)

  • 50,000 (24 V DC at 2 A)

  • 700,000 (120 V AC at 2 A)

  • 100,000 (230 V AC at 2 A)

• Short-Circuit Protection: No

• Power Supply:

  • Relay coil: 24 V DC (internal)

  • Module supply: 120 V DC (load voltage L+), 230 V AC (load voltage L1)

• Input Current:

  • From supply voltage L+: Max. 250 mA

  • From backplane bus (5 V DC): Max. 100 mA

• Power Loss: Typical 4.5 W

• Dimensions: 40 x 125 x 120 mm (W x H x D)

• Weight: Approx. 250–277 g

• Galvanic Isolation: Between channels (groups of 8), and between channels and backplane bus (optocoupler)

• Isolation Tested: 1500 V AC

• Connection: 1 x 20-pin front connector required

• Diagnostics: Status indicator LED for each output; no advanced diagnostics or alarm functions

• Cable Length:

  • Shielded: Max. 1000 m

  • Unshielded: Max. 600 m