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Siemens RDU340… Basic Documentation CE1P3078en

Building Technologies Summary 2014-09-05

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.

 Keypad 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

--   white

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