User Manual

2
Siemens
N5111
2018-02-14
Use
● Demand-controlled speed control of supply and discharge fans in air conditioning
systems
● Demand-controlled speed control of circulating pumps in HVAC systems
● Pressure boost and control of the fill level of pumps
Functions
Functions specific to pumps and fans are already integrated
● Automatic restart
Application restarts after a power failure or a fault
● Flying restart
Variable speed drive is switched in while the motor is running
● ECO mode
Automatic adaptation of the motor current to the actual load conditions, e.g. for
applications with a low dynamic response and a constant speed setpoint
● Motor staging
For applications that require simultaneous operation of between 1 and 4 motors
depending on load, e.g. closed-loop control of highly fluctuating flow volumes
● Hibernation: Drive is started/stopped in accordance with the actual setpoints
● 4 integrated PID controllers
For controlling the speed of the drive as a function of pressure, temperature, flowrate,
level, air quality and other process variables
● Essential Service Mode
Special operating mode of the variable speed drive that enhances the availability of the
drive system in the event of a fire
● Multi-zone controller
– Control of a zone with up to 3 sensors for pressure or temperature, or
– Control of two independent zones, each with one sensor
● Bypass mode
When the setpoint is reached or a fault occurs, there is a changeover to mains operation
● Programmable time switches (x 3 units)
● Real-time clock
For time-dependent process controls, e.g. temperature reduction for heating control at
night
● Freely programmable logical function blocks
For simulating simple PLC functions
● Motor monitoring with and without temperature sensor (via PTC, KTY and ThermoClick
sensor)
– Overcurrent protection
– Torque monitoring
– Overvoltage protection (Vdc_max controller)
● Braking function using a DC brake
Connections and interfaces
● Fieldbus interface of the CU230P-2 Control Unit optionally with
– RS485/USS, Modbus/RTU, BACnetMS/TP, P1 (standard delivery)
– PROFIBUS DP
– CANopen
– PROFINET IO
● 2 x LG-Ni1000-/Pt1000 interface for direct connection of temperature sensors
● 230 V relay for direct connection of auxiliary equipment