Siemens RWD62U User Manual

RWD62U
Technical Instructions
Document No. 155-737
January 14, 2005
Universal Controller
Description
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.
Features
• 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
Product Number
RWD62U
Siemens Building Technologies, Inc.

Siemens RWD62U Specifications

General

Brand	Siemens
Model	RWD62U
Category	Controller
Language	English

Summary

Product Description and Features

Core Application and Capabilities

Intended for HVAC, refrigeration, and ventilation comfort control with various auxiliary functions.

Safety and Specifications

Warning Notations

Highlights potential equipment damage if procedures are not followed.

Technical Specifications

Covers electrical, input/output, environmental, and regulatory details for the controller.

Function Summary and Compatibility

Controller Operation Modes

Describes primary loop control and auxiliary functions like setpoint compensation.

Equipment Combinations

Lists Siemens devices that can be connected to the RWD62U controller.

Software Tool and Programming

Programming Software

Details the optional Windows-based software for configuration and parameter adjustment.

Main Functions and Sequence Modes

Explains single and dual sequence programming for direct/reverse acting outputs.

Inputs, Outputs, and Auxiliary Functions

Universal Inputs and Digital Input

Describes the primary and secondary inputs and the digital input for changeover.

Analog Outputs and Auxiliary Functions

Details modulating outputs and lists selectable auxiliary functions.

Detailed Auxiliary Functionality

P+I Limiter and Remote Setpoint

Explains P+I limiter function, remote setpoint adjustment, and cascade control.

Maximum Priority and Setpoint Compensation

Details how maximum priority and setpoint compensation influence controller operation.

Operational Modes and Mechanical Design

Winter/Summer and Day/Night Operation

Describes how to implement winter/summer and day/night setpoint changeovers.

Mechanical Design and Terminals

Covers the protective housing and terminal connections for the controller.

Operating and Display Elements

Controller Interface Overview

Details the LCD display and the three operating buttons for control and adjustment.

Installation and Commissioning

Mounting Options and Electrical Notes

Covers DIN rail, wall mounting, and electrical installation precautions.

Commissioning Procedures

Outlines steps for configuring, fine-tuning, and ensuring power supply for the controller.

Wiring Diagrams

Controller Connection Diagrams

Provides wiring diagrams and connection examples for the RWD62U controller.

Dimensions

Controller and Enclosure Dimensions

Presents physical dimensions for the RWD62U controller and its protective housing.