SIEMENS CONTROLLER MODBUS RTU

VAV Compact Controllers 5 / 10 Nm with Modbus communication

  • GDB181.1E/MO with 5 Nm nominal torque
  • GLB181.1E/MO with 10 Nm nominal torque
  • Operating voltage AC 24 V
  • Modbus RTU (RS-485)
  • For plants with variable or constant air-volume flow
  • Description
Communication
  •  Modbus RTU (RS-485), galvanically separated.
Functions - Setpoint 0..100%,
  • Actual values for volume flow, position and differential pressure
  • Volume flow or position control
  • Override control Open / Close / Min / Max / Stop
  • Setpoint monitoring and backup mode
Supported baudrates 
  • 9.6, 19.2, 38.4, 57.6, 78.4, 115.2 kbaud
Transmission formats 
  • 1-8-E-1, 1-8-N-1-, 1-8-O-1, 1-8-N-2
Termination 
  • 120 kΩ electronically switchable
Supported Modbus function codes
  • 03 Read Holding Registers, 04 Read Input Registers, 06 Write Single Register, 16
  • Write Multiple registers (max. 120 registers within one message)

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