Siemens RWD62U Technical Instructions
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Siemens RWD62U Technical Instructions

Siemens RWD62U Technical Instructions

Universal controller
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RWD62U
Universal Controller
Description
Features
Product Number
The Universal controller is intended for heating, air conditioning, ventilation and
refrigeration in comfort control applications. RWD62U main loop control applications
are designed for temperature, static pressure, humidity, air pressure, fluid pressure,
refrigeration, air quality and air fluid velocity control. The controller contains pre-
programmed applications.
Auxiliary control functions include:
• Day/night setpoints
• Remote setpoint control
• Limiter control
• Cascade control
• Maximum priority
• Setpoint compensation
• Summer/winter operation
Control parameters are adjusted for maximum comfort control via three buttons on the
face of the device, or with a laptop computer and Siemens Building Technologies
program software.
NOTE:
For complete supporting technical documentation, including training
presentations, see www.us.sbt.siemens.com/hvp/components.
• Stand-alone electronic temperature controller with P or P+I response
• 24 Vac operating voltage
• Control application selectable via Application Number
• Active input scale can be selectable
• Limit and direction of the output scale can be freely assigned
• Two universal inputs for Siemens 1000 ohm nickel (Ni 1000), 1000 ohm platinum
(Pt 1000) temperature sensors and 0 Vdc to 10 Vdc signals
• Unit can be set as °F, °C, % or no specified unit
• Two modulating 0 to 10 Vdc signal outputs, direct or reverse action
• One digital input for day/night changeover
• Entering or changing of all data via operating buttons on the controller, possible
without additional tools
• Computer connection for downloading canned applications via the software tool
RWD62U
Technical Instructions
Document No. 155-737
January 14, 2005
Siemens Building Technologies, Inc.

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Summary of Contents for Siemens RWD62U

  • Page 1 • Active input scale can be selectable • Limit and direction of the output scale can be freely assigned • Two universal inputs for Siemens 1000 ohm nickel (Ni 1000), 1000 ohm platinum (Pt 1000) temperature sensors and 0 Vdc to 10 Vdc signals •...

  • Page 2: Specifications

    12.24 oz (347 grams) Analog Inputs X1, X2 Controller measuring range -58°F to 302°F (50°C to 150°C) Siemens Ni 1000 ohm @ 32°F Maximum cable length for 14 AWG Maximum 984 ft (300 m) (0°C) Pt 1000 ohm at 32°F (0°C) Controller measuring range -4°F to 356°F (-20°C to 180°C)

  • Page 3: Function Summary

    Maximum priority • Digital input D1 for setpoint changeover day/night Equipment The following Siemens devices can be connected to RWD62U Universal Controllers. Combinations Other combinations with units from third-party manufacturers are possible, if the input and output specifications match the RWD62U.

  • Page 4: Software Tool

    This tool allows controller programming prior to installation. Functions The RWD62U is a stand-alone universal controller, which performs both primary and auxiliary control functions. The respective mode is defined by entering the Controller Type corresponding configuration and setting parameters via the push buttons on the controller or the software tool.

  • Page 5: Auxiliary Functions

    Figure 6. Two Direct Acting Cool or Two Reverse Acting Cool Sequences (Application 50 to 59). Universal Input X1 The primary input for a Siemens Ni 1000 temperature sensor, a Pt 1000 temperature sensor, or a 0 to 10 Vdc active input. Universal Input X2...
  • Page 6 Cooling. Setpoint Compensation The temperature setpoint X1 is shifted by the temperature as measured at sensor X2. Configuration of the RWD62U defines the influence on setpoint X1. The example shows the room air Temp. temperature setpoint as shifted by the outside temperature.
  • Page 7 ARG62.21 connecting terminals. • The RWD62U clips into the housing. • The cable entries are located at the top and the bottom of the ARG62.21 housing. • The front has an opening for the LCD display and the programming buttons.

  • Page 8: Operating And Display Elements

    Document Number 155-737 January 14, 2005 Operating and Display The RWD62U is operated by the buttons on the controller front. Additional tools are Elements not necessary. The controller can also be programmed via the software tool, which plugs into the nine-pin port.

  • Page 9: Installation Notes

    Electrical Magnetic Interface (EMI), use only shielded cables. • The RWD62U is designed for 24 Vac operating voltage. • Use safety insulating transformers with double insulation; they must be designed for 100% duty.

  • Page 10: Wiring Diagrams

    D1 M X1 M X2 M Tool Signal input (main input: Siemens Ni 1000, Pt 1000 and 0 Y1 M to10 Vdc) Signal input (aux. Input: Siemens Ni1000, Pt 1000, 0 to10 Vdc and 0 to 1000 Ω or...
  • Page 11 3.50 (45.7) (89) 0.16 (4) Figure 20. RWD62U Controller Dimensions. 2.41 (61.2) 5.91 (150) Figure 21. ARG62.21 Enclosure Dimensions. Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced.

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