MicroBrick I/O - Industrial Control Links

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MicroBrick Distributed I/O ModulesModbus Register MapSTATUS (Input Bits - Modbus Type 10xxx)noneCOILS (Output Bits - Modbus Type 00xxx)noneINPUT REGISTERS (Read Only 16-bit - Modbus Type 30xxx)Star End Description001 008 Analog Inputs 1 thru 8248 249 Reserved - ICL Test ONLY250 - Input Voltage (power) x 10 (143 = 14.3 volts)HOLDING REGISTERS (Read/Write 16-bit - Modbus Type 40xxx)Start End Description001 008 Analog Outputs - 1 through 8 (4000 to 20000 = 4mA to 20mA)017 032 Analog Input Totalizers - Inputs 1 through 8 (32-bit, 1st/Odd register is MSB)132 - Analog Totalizer Measurement Sampling Interval133 140 Analog Input Mode - Inputs 1 through 8 (0 = “Raw”/uncalibrated, 1 = mA, 2 = 5V)161 166 Analog Outputs 1 through 6 - calibration numerators (denominator = 65,535)186 191 Analog Outputs 1 through 6 - calibration offsetsSpecifications - Analog I/O MicroBrickANALOG INPUTSNumber of Analog Inputs 8Input TypeUnipolar multiplexed inputs with shared CommonInput Levels, nominal0 to 5Vdc, +-300mV, 0/4 to 20mAInput Overload ToleranceInput voltage limiting starts at 6VdcInput current limited to 50mAOverload/Transient ProtectionTransorbs and self resetting polymer fusesConversion RateApproximately 2 samples per second at each pointNoise Rejection-120dB @ 50/60HzPower, Typical/Maximum0.75 Watts / 1.5 WattsANALOG OUTPUTSNumber of Analog Outputs 8Output TypeLoop Powered Current LoopOutput Levels, nominal4 to 20mAResolution 12-bits (1 part in 4096)Overload/Transient ProtectionTransorbs and self resetting polymer fusesConversion RateApprox. 100 conversions per second, each output70Copyright © 2007 Industrial Control Links, Inc. All Right Reserved
Combo I/O ModulesMicroBrick Distributed I/O ModulesMicroBrick “Combo” I/O modules provide a mix of discrete inputs, discrete outputsand analog inputs. They are an economical alternative to using separate moduleswhen smaller quantities of I/O are needed. Because of their mix of I/O, comboMicroBricks are frequently used as low-cost Modbus Remote Terminal Units (RTUs).Combo MicroBricks have 6 16-bit Analog Inputs, 10 Discrete Inputs (12/24V or 120Vmodels), and 4 discrete (FET) outputs. The functionality of each section is identical totheir equivalent MicroBrick module. In addition, the Discrete Input section hasprogrammable filtering on 2 of the 10 inputs. When the filters are switched OFF, thesetwo discrete inputs support high-speed counting rates of up to 5Khz (5,000 pulses persecond).Combo Module Discrete Input SectionMicroBrick Combo module Discrete Inputs are used to monitor the state of switches,relays contacts, motor starter auxiliary contacts and any other on/off type sensorsignal. The inputs are optically isolated to avoid ground loop effects and damage fromtransients and power surges. There are a total of 10 discrete inputs grouped as 8 and2 inputs with separate commons.Signal Types and LevelsMicroBrick Combo module Discrete Inputs have a unique input design that acceptsboth AC and DC signals. The inputs are not sensitive to signal polarity, supporting DCsensors with either “sinking” or “sourcing” output configurations as well as switchcontacts with AC or DC signals.Currently, there are two models of MicroBrick Combo Modules; one with discreteinputs designed for low-voltage (12/24V) operation, the other for 120V operation. Inthe low voltage model, an input level of 9 volts (AC/DC) or greater is considered to bean “ON”. Input levels of 6 volts (AC/DC) or less are considered OFF. The inputs canaccept signal levels of up to 50 volts (AC/DC) and tolerate overloads of nearly twicethat. The 120V model responds to inputs of 75V or greater as an “ON”, 50V or less asan “OFF” and will tolerate a 100% overload.LED Input Status IndicatorsEach discrete input has an LED indicator to show the current ON or OFF state of theinput. Typically, the state of the LED indicator mimics the state of the input, unlessthe input is “forced” on or off. When the state of an input is forced, the LED shows theforced state that is communicated back to a Host Controller, regardless of the actualinput state.I/O Processor FunctionsThe modules discrete inputs are supported by a microprocessor that performs inputnoise filtering, pulse totalization and pulse rate computation, helping to off-load theHost Controller and improve system performance.Copyright © 2007 Industrial Control Links, Inc. All Right Reserved71
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MicroBrick I/O - Industrial Control Links

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