Siemens RDU340 - 2 Summary; Brief Description; Features; Type Summary

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Siemens RDU340… Basic Documentation CE1P3078en
Building Technologies Summary 2014-11-03
2 Summary
2.1 Brief description
The devices support VAV heating and cooling systems:
· Modulating PI / P control
· Control depending on the room or the return air temperature
· Output for a DC 0…10 V actuator and AC 230V electrical heater (ON-OFF)
· Automatic or manual heating/cooling changeover
· Operating modes: Comfort, Energy Saving and Protection
· Two multifunctional inputs for keycard contact, external sensor, etc.
· Adjustable commissioning and control parameters
· Minimum and maximum setpoint limitation
· Adjustable minimum and maximum limitation of output signal DC 0..10V
· Output signal inversion as an option
· Mounting on recessed rectangular conduit box, 60.3 mm fixing centers
· AC 24 V operating voltage
2.2 Features
· Maintain room temperature via built-in temperature sensor external room
temperature / return air temperature sensor
· Automatic or manual changeover between heating and cooling mode
· Select applications via DIP switches
· Select operating mode via the operating mode button on the controller
· Display current room temperature or setpoint in °C and/or °F
· Minimum and maximum setpoint limitation
· Key lock (automatic and manual)
· Two multifunctional inputs, freely selectable for:
– Operating mode switchover contact (key card)
– Automatic heating/cooling changeover sensor
– External room temperature or return air temperature
– Dewpoint sensor
– Electric heater enable
– Alarm input
· Minimum and maximum limitation of air flow signal DC 0..10V
· Floor heating temperature limit
· Reload factory settings for commissioning and control parameters
2.3 Type summary
Product
number
Operating Voltage
Control output
LCD Backlight Infrared receiver Housing Colour r
3 pt on/off DC 0..10 V
RDU340 AC 24 V
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