IS220PPRFH1A | GE rofibus Master Gateway Analog I/O

Description

Mark VI General Electric module IS220PPRFH1A is labeled a Profibus Master Gateway Analog I/O Pack and works with the IS200PIDG1A accessory board. This model was rated to operate in hazardous and non-hazardous locations.

Part Number：IS220PPRFH1A

Series：Mark VI Turbine Control System

Manufacturer：General Electric

Operating Temperature：-20 to +55°C

Product Type：Analog I/O Pack

Product Description：PROFIBUS Master Gateway Module

Functional Acronym/Abbreviation：PPRF

Input Current：Max .18 Adc

Input Voltage：Min 27.4 - Max 28.6 Vdc

Product Description Model number IS220PPRFH1A is described within the Mark VI series produced by General Electric as a PROFIBUS Master Gateway Module. While this model was designed to be used in the Mark VI series, it can also be used in the Mark VIe and Mark VIeS series. The PPRF model is considered an analog output pack and is often used with the IS200SPIDG1A accessory ID board. Together the I/O pack and the terminal board were rated and approved for hazardous and non-hazardous locations.  When the IS220PPRFH1A model is being used, there are electrical specifications that must be followed so as to eliminate potential property damage or some cases, personal injury. There are two specifications, labeled voltage and current. The power supply voltage has a range of 27.4 to 28.6 VDC, with the nominal voltage supply being 28.0 VDC. The power supply current used by the PPRF pack is a maximum of 0.18 ADC. There is also a specific temperature range the PPRF model must be used in; this temperature range is -4 to 131°F or -20 to 55°C. As mentioned above, the IS220PPRFH1A model was rated for use in hazardous and non-hazardous locations. For each location, there is a listing certification. The non-hazardous certification is UL E207685, which is the same as the Class I, Division 2, Groups A, B, C, D, and Class I, Zone 2, Group IIC certifications. The certification for ATEX Zone 2, Group IIC is UL DEMKO 12 ATEX 1114875X. For more certifications, refer to the GEH-6725 Mark VIe and Mark VIeS Controls Equipment HazLoc manual.

An RTD or resistance temperature detector is a sensor used to measure temperature. Made of platinum, copper or nickel, RTDS have repeatable resistance and temperature relationships and operate from -200°C to +850°C. The RTD contains a resistor whose resistance value varies with temperature. It has been used for temperature measurement in laboratory and industrial processes for many years and is widely recognized for its accuracy, repeatability and stability. Platinum is a precious metal that has a stable resistance-temperature relationship over a large temperature range and is therefore more common than copper or nickel RTDS. The PT100 is one of the most common and accurate RTD sensors. It not only has good accuracy, but also provides excellent stability and repeatability. Most standard PT100 sensors comply with DIN IEC Class B standards. The PT100 sensor also has some resistance to electrical noise, making it ideal for temperature measurement in industrial environments, especially around motors, generators and other high-voltage equipment. Due to their accuracy and repeatability above 0.1°C, RTDS are beginning to gradually replace thermocouples in industrial applications below 600°C. A thermistor is a sensor resistor whose resistance value changes with temperature. According to different Temperature coefficients, it is divided into Positive Temperature Coefficient thermistor (PTC thermistor) and negative temperature coefficient thermistor (NTC thermistor). Negative Temperature Coefficient thermistor). The resistance value of positive temperature coefficient thermistor increases with the increase of temperature, and the resistance value of negative temperature coefficient thermistor decreases with the increase of temperature.

The main characteristics of thermistors are: ① The sensitivity is high, and the resistance temperature coefficient is more than 10 to 100 times larger than the metal, and the temperature change of 10-6℃ can be detected; ② Wide operating temperature range, normal temperature devices are suitable for -55℃ ~ 315℃, high temperature devices are suitable for temperatures higher than 315℃ (currently up to 2000℃), low temperature devices are suitable for -273℃ ~ -55℃; ③ Small in size, it can measure the temperature of voids, cavities and blood vessels in organisms that cannot be measured by other thermometers; ④ Easy to use, resistance value can be arbitrarily selected between 0.1 ~ 100kΩ; ⑤ Easy to process into complex shapes, can be mass-produced; ⑥ Good stability, strong overload capacity. Basic characteristic The resistance temperature characteristic of a thermistor can be approximated by the following formula: R=R0exp{B (1/T-1/T0)} : R: resistance value at temperature T(K), Ro: resistance value at temperature T0, (K), B:B, *T(K)=t(ºC)+273.15.   In fact, the thermistor's B value is not constant, and its variation varies depending on the material composition, up to 5K/°C.   Therefore, when formula 1 is applied in a large temperature range, there will be a certain error between it and the measured value.   Here, if the B value in equation 1 is calculated as a function of temperature as shown in equation 2, the error between the measured value and the measured value can be reduced and can be considered to be approximately equal. BT=CT2+DT+E, where C, D and E are constants.   In addition, the fluctuation of B value caused by different production conditions will cause the constant E to change, but the constant C and D remain unchanged.   Therefore, when discussing the fluctuation of B value, only the constant E can be considered.   The constants C, D, E can be calculated from the (temperature, resistance value) data (T0,R0).(T1,R1).(T2,R2) and(T3,R3) at 4 points, through equations 3 ~ 6.   Firstly, from pattern 3, according to the resistance values of T0 and T1,T2,T3, B1,B2,B3, and then substitute the following patterns. Resistance value calculation example: Try to calculate the resistance value of 5(kω) at 25°C and the resistance value of a thermistor with a B value deviation of 50(K) from 10°C to 30°C according to the resistance temperature characteristic table.   Step (1) According to the resistance-temperature characteristic table, find the constants C, D, E. To=25+273.15T1=10+273.15T2=20+273.15T3=30+273.15 (2) BT=CT2+DT+E+50.   (3) Calculate R by substituting the value into R=5exp {(BT1/T-1/298.15)}.   *T:10+273.15 ~ 30+273.15.

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