Siemens Manuals

This manual is an operator's guide for the SINUMERIK 840D/840Di/810D control system, which introduces all the main programming steps. Its purpose is to provide the operator with some quick help and help with memory, especially some uncommon commands, or to provide a quick reference to various parameters.

This document introduces the knowledge of PCS 7 redundancy process control system, including basic knowledge of redundancy, redundancy solutions in PCS 7, advantages of redundant components, component replacement and device changes, fault, switching and return of redundant components, diagnosis, etc.

The RLU2 universal controller is used to process control variables such as temperature, relative/absolute humidity, pressure/pressure difference, airflow, indoor air quality and enthalpy. The controller offers pre-set standard applications and can be freely programmed to suit specific model requirements. It provides P-, PI, or PID modes and supports menu-driven operation.

This document provides instructions for using SIMATIC 500/505 for configuration, debugging, parameters, optimization, allowed data types, analog alarms, process cycles, and special functions

The document introduces Symaro™ duct-type sensor QFM21, which is used to measure relative humidity and temperature. Its features include operating voltage of AC 24 V or DC 13.5-35 V, signal output of DC 0.10 V/4-20 mA for relative humidity and DC 0.10 V/4-20 mA or T1 or LG-Ni 1000 for temperature. The sensor can be used for controlling supply and exhaust air, reference sensors, limit sensors, etc.

The QFM65 duct sensor measures relative humidity and temperature in ventilation and air-conditioning systems. It can be used as control sensor in supply or return air ducts, reference sensor, limit sensor, measurement value display or interface with a building management system.