Control and AutomationSolutions GuideEdition 1, December 2011
5PLCsPLC Design GoalsRobustnessPLCs are expected to work awlessly for years in industrial environments that are hazardous to the very microelectronic
95Environmental AutomationBuilding Energy Measurement and ManagementIn the days of abundant, low-cost energy, the consumption of energy to run a build
96 Control and Automation Solutions Guidesuch as PLCs or industrial computers (see the Programmable Logic Controllers (PLCs) chapter). These transceiv
97Environmental AutomationEquipment includes re alarm control panels, which are the hub of the system. The panels communicate through various means w
98 Control and Automation Solutions GuideThis equipment and the main controller are usually in a machine room located at the top of the building. Alte
99Environmental Automation: Featured ProductsOctal Power and Energy Measurement IC Provides Accurate Data from Power Distribution Units78M6618The 78M6
100 Control and Automation Solutions GuideRFID Keycard Meets International Standards for Data Authentication and Transmission to Provide Secure Contac
101Environmental Automation: Featured ProductsAdd Programmable Thermostat Function to Any Equipment with Single ICDS7505The DS7505 is a single IC ther
102 Control and Automation Solutions GuideHierarchyAs mentioned at the beginning of this chapter, BASs are truly DCSs made up of a networked collectio
103Environmental Automationsince its outputs are used for several other things.) Responding to the BAS, the VAV unit simply needs to generate a xed t
104 Control and Automation Solutions Guideonce the PD is removed. The PSE must also protect the cable and the PD from overcurrent and short-circuit co
6 Control and Automation Solutions GuideOverviewThe analog input portion of a PLC accepts analog signals from a variety of sensors via factory or eld
105Environmental AutomationTransmit power, antenna gains and losses, transmission medium losses, receiver sensitivity, noise, interference sources, an
106 Control and Automation Solutions GuidePoE Controllers at Both Ends of the Link Enable Power Beyond Standards While Lowering Power LossMAX5980, MA
107Environmental Automation: Featured ProductsEnable Wireless Links That Need No Battery ReplacementMAX17710The MAX17710 is an energy-harvesting batte
108 Control and Automation Solutions GuideRadio Links Ease Installation of Remote Occupancy Sensors MAX1472, MAX7057, MAX9636/MAX9637/MAX9638, MAX9060
109Environmental Automation: Recommended SolutionsRecommended SolutionsThermal ManagementPart Description Features BenefitsTemperature SensorsDS7505
110 Control and Automation Solutions Guide*Future product—contact the factory for availability.Light and Proximity SensorsPart Description Features
111Environmental Automation: Recommended SolutionsControl Panels and DisplaysPart Description Features BenefitsTouch-Screen ControllersMA X11800, MA
112 Control and Automation Solutions GuidePower over Ethernet (PoE)Part Description Features BenefitsPower-Sourcing EquipmentMAX5980 Quad IEEE 802.3
113Environmental Automation: Recommended SolutionsInterfacePart Description Features BenefitsRS-485 TransceiversMAX13448E ±80V fault-protected full-
114 Control and Automation Solutions Guide
7PLCsApplications that require extraction of phase information between channels are well suited for multiple ADCs or simultaneous-sampling multichanne
115Motor Control
116 Control and Automation Solutions Guide
117Motor ControlIntroductionMotor control design for industrial applications requires attention to both superior performance and ruggedness. Maxim’s f
118 Control and Automation Solutions GuideFigure 1. Two control techniques for BDC motors. The upper diagram shows a variable voltage technique that i
119Motor Controluser adjusts the speed control or when the microcontroller receives a command through the electronic interface, the microcontroller th
120 Control and Automation Solutions GuideControllers for BLDC MotorsSince the commutation in a BLDC motor (Figure 4) is electronic, some means is req
121Motor ControlControllers for Stepper MotorsStepper motors are constant power motors if driven with a constant supply voltage. As speed increases, t
122 Control and Automation Solutions GuideControllers for SRMsSRMs are similar to stepper motors because they need power switched to the proper windin
123Motor ControlAC Induction Motor The AC induction motor (Figure9) is the workhorse motor for many industrial applications such as those for driving
124 Control and Automation Solutions Guidethat provides complete control capability over motor soft-starting, acceleration, torque, speed maintenance,
8 Control and Automation Solutions GuideFeatured ProductsBenefits• High supply voltage simplifies designs by eliminating external parts ◦ Wide, +72V
125Motor Control: Featured ProductsBenefits• Simplicity of DC motor speed control via digital interface• Easy design reuse due to highly scalable ou
126 Control and Automation Solutions GuideBenefits• Provide reliable operation in harsh motor control environments ◦ 400µV (max) input offset voltage
127Motor Control: Featured ProductsBenefits• Integrated functionality eases motor control design, reduces system cost ◦ Select the analog or digita
128 Control and Automation Solutions GuideBenefits• High integration provides accurate phase information for precise sensing of rotor position ◦ Di
129Motor Control: Featured ProductsBenefits• Industry-leading dynamic range allows early detection of error signals ◦ 93dB SNR and -105dB THD• Sim
130 Control and Automation Solutions GuideRecommended SolutionsPart Description Features BenefitsAC-DC and DC-DC Converters and ControllersMAX17499/
131Motor Control: Recommended SolutionsPart Description Features BenefitsOperational AmplifiersMAX9617/18/19/20 High efficiency, zero drift, op amps
132 Control and Automation Solutions GuidePart Description Features BenefitsInterface TransceiversMAX13448E Fault-protected RS-485 transceiver ±80V
133Calibration and Automated Calibration
134 Control and Automation Solutions Guide
9PLCs: Featured ProductsBenefits• Maintain system calibration and accuracy over time and temperature with low-temperature coefficients ◦ Autozero te
135Calibration and Automated CalibrationThe goal of calibration is to maintain a piece of equipment in its most accurate state. The goal of automated
136 Control and Automation Solutions GuideTest Equipment CalibrationWhile calibration of the end product is required to establish its performance, the
137Calibration and Automated CalibrationSuch environmental factors include temperature, humidity, vibration, contamination, and component aging. These
138 Control and Automation Solutions GuideImplementing Electronic CalibrationDigital pots, which can guarantee 50,000 write cycles, allow periodic adj
139Calibration and Automated Calibration: Recommended SolutionsRecommended Solutions*Future product—contact the factory for availability.Part Descript
140 Control and Automation Solutions Guide
141Legal Notices
142 Control and Automation Solutions Guide
143Legal NoticesTrademark InformationiButton is a registered trademark of Maxim Integrated Products, Inc.µMAX is a registered trademark of Maxim Integ
144 Control and Automation Solutions Guide
10 Control and Automation Solutions GuideBenefits• Reduce complexity and cost by eliminating external gain stages and muxes ◦ Each ADC measures eigh
Maxim Integrated Products, Inc. 120 San Gabriel Drive Sunnyvale, CA 94086 www.maxim-ic.com/control-autoFor a complete list of Maxim’s sales offices an
11PLCs: Featured Products24-Bit ADC Oers the Highest Resolution for 4–20mA LoopsMAX11210The MAX11210 24-bit, 1-channel ADC oers an industry-leading
12 Control and Automation Solutions GuideAnalog Output FunctionsOverviewAnalog output signals are required in situations where a compatible transducer
13PLCsloops, where signaling is analog using any current within the loop range. Practical loop lengths can be up to tens of kilometers. The only cavea
14 Control and Automation Solutions GuideFeatured ProductsDACs Ideal for Loop-Powered Applications Without Sacricing Precision and Accuracy for Low
iControl and Automation Solutions GuideA message from the Senior Vice President, Industrial and Medical Solutions GroupDear Customers,Over 28 years ag
15PLCs: Featured ProductsSystem Flexibility and Reduced Cost with Multichannel DACsMAX5134/MAX5135/MAX5136/MAX5137The MAX5134–MAX5137 are pin- and sof
16 Control and Automation Solutions GuideEnhance System Safety and Reliability with an Output ConditionerMAX15500/MAX15501The MAX15500/MAX15501 analog
17PLCs: Featured Products16-Bit DAC with Integrated Voltage and Current Output Conditioner Reduces Board Area and Eliminates External ComponentsMAX566
18 Control and Automation Solutions GuideImprove System Accuracy for High-Voltage Applications in a Harsh Environment with High-Precision Output Condi
19PLCs: Featured ProductsResistor Network Saves Cost and Space Without Sacricing System Precision MAX5490, MAX5491, MAX5492The MAX5490 family of prec
20 Control and Automation Solutions GuideSave Space in Low-Power Process-Control Equipment with a Single-Chip HART ModemDS8500The DS8500 is a single-c
21PLCsOverviewDigital I/Os communicate digitally to industrial sensors and actuators. The sensors and actuators are located in the eld and, thus, are
22 Control and Automation Solutions GuideIO-Link Master Transceiver Enables High-Density IO-Link MastersMAX14824The MAX14824 is an IO-Link master tra
23PLCs: Featured ProductsSimplest, Most Economical Solution for High-Port-Count IO-Link Systems MAX14830The MAX14830 is an advanced quad, serial UART
24 Control and Automation Solutions GuideOverviewA eldbus is the communications link between dispersed process-control equipment. The ocial meaning
ii Control and Automation Solutions Guide
25PLCsin order to tolerate any ground dierences on the factory oor and to protect against any electrical noise on the lines from peripheral sensors.
26 Control and Automation Solutions GuideTransceiver Meets PROFIBUS DP Standards and Protects Against ±35kV ESD MAX14770EThe MAX14770E PROFIBUS DP tr
27PLCs: Featured ProductsRS-485 Transceivers with Integrated Termination Simplify Equipment Installation MAX13450E/MAX13451E RS-485 half-duplex and fu
28 Control and Automation Solutions GuideIsolated RS-485 Transceiver Reduces BOM ComplexityMAX3535EGalvanic isolation between the PLC’s backplane and
29PLCs: Featured ProductsIndustry’s Smallest RS-485 Transceivers Save Board Space and Reduce BOM ComplexityMAX13430E–MAX13433EAs industrial modules be
30 Control and Automation Solutions GuideOverviewThe CPU functions for a PLC include the processor, memory, and support circuitry required to execute
31PLCsOverviewTypically PLCs have a backplane power rail of +24V DC, although the actual voltage can dier, usually from 12V to 48V. The power comes f
32 Control and Automation Solutions GuideFlexible Solution for Push-Pull and Half-/Full-Bridge Power Supplies, Ideal for High-Power ApplicationsMAX506
33PLCs: Featured ProductsHigh Level of Integration Reduces Design Cost and Complexity in Universal Oine Power Supplies MAX17497, MAX17498The MAX174
34 Control and Automation Solutions GuideSave Space and Costs by Integrating Three Switching ControllersMAX15048/MAX15049The MAX15048/MAX15049 are tri
iiiContentsTable of ContentsProgrammable Logic Controllers (PLCs)3 Overview6 Analog Input FunctionsFeatured Products12 Analog Output FunctionsFeatur
35PLCs: Featured ProductsSave Cost and Reduce Solution Footprint with Integrated DC-DC Converters That Power O a 24V Nominal Industrial BusMAX15062*,
36 Control and Automation Solutions Guide36V Transformer Driver Simplies Isolated PowerMAX13256The MAX13256 enables a simple and exible approach to
37PLCs: Recommended SolutionsRecommended SolutionsAnalog Input FunctionsPart Description Features BenefitsActive Filters MAX7409/10MAX7413/145th-
38 Control and Automation Solutions GuidePart Description Features BenefitsMultiplexers MAX14778 Above/below the rails dual 4-to-1 multiplexers
39PLCs: Recommended SolutionsPart Description Features BenefitsSignal Conditioners MAX1452 Low-cost, precision sensor signal conditionerMultitemp
40 Control and Automation Solutions GuideAnalog Output FunctionsPart Description Features BenefitsHART DS8500 HART modem HART compliant, integr
41PLCs: Recommended SolutionsPart Description Features BenefitsThermal Management MAX6631 Low-power digital temperature sensor±1°C accuracy from
42 Control and Automation Solutions GuideDigital I/O FunctionsPart Description Features BenefitsDigital I/O Modules MAX14830 Quad SPI/I2C UART w
43PLCs: Recommended SolutionsCPU Functions Part Description Features BenefitsMicrocontrollers MAXQ2010 Low-power, 16-bit mixed-signal LCD micr
44 Control and Automation Solutions GuideNonisolated and Isolated Power-Supply Functions Part Description Features BenefitsOffline AC-DC, DC-DC Con
iv Control and Automation Solutions Guide
45PLCs: Recommended SolutionsPart Description Features BenefitsNonisolated DC-DC Internal FET Regulators MAX15062* 36V, synchronous, micro buck r
46 Control and Automation Solutions GuidePart Description Features BenefitsThermal Management DS7505 Low-voltage, precision digital thermometer a
47Sensors
48 Control and Automation Solutions Guide
49SensorsOverviewIntroductionMaxim oers a range of products extending from sensors for properties such as temperature, light, acceleration, etc., to
50 Control and Automation Solutions GuidePressure Sensors and Weigh Scales (Force Sensing)OverviewThe need to detect and measure pressure and weight i
51SensorsComplete Signal-Chain SolutionsThe sensor signal chain must handle extremely small signals in the presence of noise. Accurately measuring cha
52 Control and Automation Solutions GuideFeatured ProductsFlexible ADCs Interface with a Wide Range of Sensor Signal LevelsMAX1415/MAX1416Pressure sen
53Sensors: Featured ProductsMaintain High Accuracy Over Time and TemperatureMAX9617/MAX9618, MAX11200One of the biggest challenges when interfacing to
54 Control and Automation Solutions GuideLow-Cost, High-Precision Analog Sensor Signal Conditioner Simplies Sensor DesignMAX1452The MAX1452 is a vers
1Programmable Logic Controllers (PLCs)
55Sensors: Featured ProductsLow-Power, Low-Noise, Multichannel Digital Sensor Signal Conditioner Saves Cost and Board Space MAX1464The MAX1464 is a hi
56 Control and Automation Solutions GuideHigh-Performance Sensor Signal Conditioner with Fully Analog Signal PathMAX1454The MAX1454 is a high-performa
57SensorsOverviewTemperature sensing is critically important for implementing three key functions in industrial systems. 1. Temperature control, for
58 Control and Automation Solutions GuideThermistorsThermistors are temperature-dependent resistors, usually made from semiconducting materials like m
59SensorsIn addition to all the components shown in Figure 3, Maxim manufactures the MAX31855 family of thermocouple-to-digital converters, which perf
60 Control and Automation Solutions Guideor one that is integrated on the die of another IC. Microprocessors, eld-programmable gate arrays (FPGAs), a
61Sensors: Featured ProductsFeatured ProductsSimple, Integrated RTD-to-Digital ConversionMAX1402, MAX4236/MAX4237Any appreciable resistance in the RTD
62 Control and Automation Solutions GuideComplete Thermocouple Interface Designs Eliminate External Components, Use Less SpaceDS600, MAX1416, MAX6133,
63Sensors: Featured ProductsComplete Thermocouple Interface Designs Eliminate External Components, Use Less Space (continued)DS600, MAX1416, MAX6133,
64 Control and Automation Solutions GuideOverviewLight sensing is used in a variety of applications ranging from light dimming based on ambient light
2 Control and Automation Solutions Guide
65Sensors: Featured ProductsFeatured ProductsSave Power, Reduce System Cost and Complexity with an Integrated Ambient Light SensorMAX44009The MAX4400
66 Control and Automation Solutions GuideOptical FusionRGB-IR-Ambient and Temperature SensingMAX44006*/MAX44008*The MAX44006/MAX44008 integrate ve o
67Sensors: Featured ProductsMaximize System Accuracy in Photodiode and High-Ohmic Sensor ApplicationsMAX9945The MAX9945 operational amplier features
68 Control and Automation Solutions GuideOverviewProximity sensing is used in many applications to control position, to sense an object, and to contro
69Sensors: Featured ProductsFeatured ProductsReliable Hall-Eect Sensor Interface Provides Flexibility and Reduces Component CountMAX9621The MAX9621 p
70 Control and Automation Solutions GuideIntegrated Digital Ambient Light and Proximity SensorMAX44000The MAX44000 combines a wide dynamic range ambie
71SensorsOverviewData logging is a common requirement in control and automation systems as a way of providing conrmation of proper operation over tim
72 Control and Automation Solutions GuideFeatured ProductsHigh-Accuracy Digital Temperature and Data Loggers Oer Highest Data Integrity and Temperatu
73Sensors: Featured ProductsDigital Temperature/Humidity Data Logger Ensures Accurate ReadingDS1923 The DS1923 temperature/humidity logger Hygrochron
74 Control and Automation Solutions GuideAnalog CommunicationA sensor communicates its “sensed” information with analog or digital techniques. Analog
3PLCsIntroductionProgrammable logic controllers (PLCs) have been an integral part of factory automation and industrial process control for decades. PL
75Sensors: Featured ProductsFeatured ProductsIndustry’s Smallest RS-485 Transceivers Save Board Space and Reduce BOM ComplexityMAX13485E/MAX13486E, MA
76 Control and Automation Solutions GuideReduce PCB Footprint with IO-Link/Binary Sensor InterfaceMAX14820, MAX14821The MAX14820 and MAX14821 are tran
77Sensors: Recommended SolutionsRecommended SolutionsPressure Sensors and Weigh ScalesPart Description Features BenefitsADCsMAX1415/16MX770516-bit,
78 Control and Automation Solutions GuideTemperature SensorsPart Description Features BenefitsThermal Management DS600 Precision analog-output te
79Sensors: Recommended SolutionsLight SensorsPart Description Features BenefitsAmbient Light SensorsMAX44009 Digital ambient light sensor 1µA ultra-
80 Control and Automation Solutions GuideProximity SensorsPart Description Features BenefitsProximity SensorsMAX44000 Integrated proximity sensor a
81Environmental Automation
82 Control and Automation Solutions Guide
83Environmental AutomationIntroductionEnvironmental automation refers to the automated controls for systems that regulate the environmental conditions
84 Control and Automation Solutions GuideBuilding Automation Systems (BASs)A building is much like a factory in that it is expected to be ecient, and
4 Control and Automation Solutions GuideBasic Process ControlHow simple can process control be? Consider a common household oven.The oven’s components
85Environmental AutomationWater Supply SystemsBecause water is needed in any residential or commercial building, water supply systems are critical to
86 Control and Automation Solutions Guideusage needs, such as known low DHW usage in a building during the night, it can allow the temperature to drop
87Environmental AutomationHVAC&R SystemsIntroductionHVAC&R equipment performs space heating and/or cooling and refrigeration for residential,
88 Control and Automation Solutions Guidesystems. On the evaporator, the heat exchanger transfers the coldness into the water to be piped throughout t
89Environmental AutomationThermostatProgrammable electronic thermostats in homes and similar, but more sophisticated systems for commercial buildings
90 Control and Automation Solutions Guidea fuel-burning capability for heating and a refrigeration unit for cooling. MAUs dier from AHUs in that they
91Environmental AutomationSmoke detectors are the most often seen air quality monitors in homes and hotel rooms. Now carbon monoxide detectors are req
92 Control and Automation Solutions Guideto condense. The heat generated by the vapor is often discarded. However, in some systems the heat generated
93Environmental Automationof events and the corresponding lighting and A/V equipment needs are preprogrammed so that, as an event progresses, the oper
94 Control and Automation Solutions GuideFeatured ProductsBenefits• Enable sophisticated touch-screen panels with minimal processor overhead ◦ Digita
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