General Specifications

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1 General Specifications GS J0X-0E Model MXT Universal Computing Unit (-input, Isolated -output Type) General This plug-in type universal computing unit receives DC current or DC voltage signals, applies various computing functions to them, and then converts them into isolated DC current or DC voltage signals. The optional Parameter Setting Tool (VJ) or Handy Terminal (JHT00) can be used for the setting changes of various parameters such as computing functions or input/output ranges, the setting changes of programs, and the test outputs. The operation indicating lamp shows the operation status, abnormalities in a setting etc. Without a setting tool such as Handy Terminal etc., outputs can be adjusted using the switches on the front panel. Model and Suffix Codes MXT- N - *B/ Model Function : Free program R: Temperature-pressure S: ddition/subtraction T: Multiplication/Division U: Square root extraction V: High selector W: Low selector Input signal : 0 to 0 m DC Span is m or more : 0 to +0 V DC Span is 0. V or more signal : 0 to 0 m DC Span is m or more B: 0 to m DC Span is m or more : 0 to 0 V DC Span is 0. V or more : 0 to 00 mv DC Span is 0 mv or more : 0 to +0 V DC Span is 0. V or more : 00 to +00 mv DC Span is 0 mv or more Power supply : -0 V DC (Operating range: to 8 V DC) : 00-0 V C (Operating range: 8 to V C) Ordering Information Specify the following when ordering. Model and suffix codes: e.g. MXT-N-*B Input range: e.g. to 0 m DC range: e.g. to V DC If the constants for each computing function are specified with the order, the specified values will be assigned before shipment. (Refer to Functions. ) Input/ Specifications Input signal: points of DC current or DC voltage signals (However, points of signals must have the same input range.) Input setting range: Input signal suffix code Setting range 0 to 0 m DC Span is m or more* ±0 V DC Span is 0. V or more *: Setting range is 0 to m DC for the optional specification /R0. Input resistance: Current signal: 00 Ω (external receiving resistor) 0 Ω for the optional specification /R0 Voltage signal: MΩ (800 kω during power off) Permissible applicable input: Current input: 0 m DC or less for input resistance of 00 Ω 0 m DC or less for input resistance of 0 Ω Voltage input: ± V DC or less Optional specification /R0: With 0 Ω receiving resistor GS J0X-0E Copyright Jul. 00 (YK) nd Edition Nov. 00 (YK)

2 signal: point of DC current or DC voltage signal nalog output setting range: signal suffix code B Setting range 0 to 0 m DC Span is m or more 0 to m DC Span is m or more 0 to 0 V DC Span is 0. V or more 0 to 00 mv DC Span is 0 mv or more ±0 V DC Span is 0. V or more ±00 mv DC Span is 0 mv or more nalog output permissible load resistance: range 0 to 0 m DC 0 to m DC 0 to V DC 0 to 0 V DC 0 to 00 mv DC 0 to +0 V DC 00 to +00 mv DC Permissible load resistance 0 Ω or less 000 Ω or less kω or more 0 kω or more (when 00% output exceeds V) 0 kω or more 0 kω or more 0 kω or more Input adjustment range: ±% of span or more (zero/span adjustments) adjustment range: ±% of span or more (zero/span adjustments) Standard Performance ccuracy rating: ±0.% of span However, the accuracy is not guaranteed for output levels less than 0.% of the span of a 0 to X m output range type. The accuracy is limited according to the input/output range settings. ccuracy Calculation ccuracy = Input accuracy + accuracy (%) ccuracy is obtained by totalizing the expression () for input accuracy and the expression () for output accuracy. However, ±0.0% is applied if a value obtained from the expression () or () is less than ±0.0%. For current input, add the error of receiving resistor ±0.% to the input accuracy. Input accuracy = ±0.0% a/b expression () Input signal suffix code Input range (Range converted into voltage) Outside of ±. V DC and within ±0 V DC ±. V DC ccuracy calculation condition a (V) (V) b Input span (Span converted into voltage) Note: When input signal is current, the values converted into voltage by the receiving resistor are applied to the input range and input span. accuracy = ±0.0% a/b expression () signal suffix code B range 0 to 0 m DC 0 to m DC 0 to. V DC Outside of 0 to. V DC and within 0 to 0 V DC 0 to mv DC Outside of 0 to mv DC and within 0 to00 mv DC ±. V DC Outside of ±. V DC and within ±0 V DC ± mv DC Outside of ± mv DC and within ±00 mv DC 0 (m). (m) (V) (V) 0 (mv) 0 (mv) (V) (V) 0(mV) 0 (mv) span ccuracy calculation condition [Example of accuracy calculation] Input range: 0 to 0 m DC Receiving resistor: 0 Ω (0 to V DC when converted into voltage) range: 0 to 0 mv DC Input accuracy = ±0.0% = ±0.0% ±0.0% ( since it is less than ±0.0%) dd ±0.% (error of receiving resistor) to the above. Then, Input accuracy = ±0.% accuracy = ±0.0% 0 0 = ±0.% Therefore, ccuracy = ±0.% Computation cycle: 00 ms (For the function suffix code, selectable from 0 ms, 00 ms and 00 ms.) Response speed: 00 ms, % response (0 to 90%) Effect of power supply voltage fluctuations: Equal to or less than whichever is greater, ±0.% of span or accuracy for the fluctuation within the operating range of each power supply voltage specification. Effect of ambient temperature change: ±0.% of span or less for a temperature change of 0 C. a b ll Rights Reserved. Copyright 00, Yokogawa Electric Corporation GS J0X-0E nd Edition Nov. 0, 00-00

3 Power Supply and Isolation Power supply rated voltage: -0 V DC or 00-0 V C 0/0 Hz Power supply input voltage: -0 V DC (±0%) or 00-0 V C (, +0%) 0/0 Hz Power consumption: V DC.9 W 00 V C. V, 00 V C. V Insulation resistance: 00 MΩ or more at 00 V DC between input, output, power supply, and grounding terminals mutually. (Each input terminal is not isolated mutually.) Withstand voltage: 000 V C for minute between input, output, power supply and grounding terminals mutually. Environmental Conditions Operating temperature range: 0 to 0 C Operating humidity range: to 90% RH (no condensation) Operating conditions: void installation in such environments as corrosive gas like sulfide hydrogen, dust, sea breeze and direct sunlight. Installation altitude: 000 m or less above sea level. Mounting and Dimensions Material: Main unit : BS resin (black), UL9 V-0 BS resin + polycarbonate resin (black), UL9 V-0 PBT resin, including glass fiber (black), UL9 V-0 Socket: Modified polyphenylene oxide resin, including glass fiber (black), UL9 V- Mounting: Wall or DIN rail mounting (When mounting the units close together, leave a space of at least mm between them.) Connection: M. screw terminals External dimensions: 8. (H) (W) (D) mm Weight: (including a socket) Main unit: approx. 00 g Socket: approx. 80 g ccessories Spacer: One (for DIN rail mounting) Range label: One Receiving resistor: Three (for current input) * When the optional specification /R0 is specified, the 0 Ω receiving resistor is attached. When the optional specification /R0 is not specified, the 00 Ω receiving resistor is attached. Front Panel can be adjusted using the selection switch and adjustment switch. Connector for communication Selection switch djustment switch Position of selection switch 0 Operation indicating lamp: Turns on at power on. Item to be adjusted zero adjustment span adjustment Terminal ssignments OUTPUT OUTPUT INPUT INPUT INPUT INPUT SUPPLY SUPPLY GND INPUT INPUT (L) (N) (GND) ll Rights Reserved. Copyright 00, Yokogawa Electric Corporation GS J0X-0E nd Edition Nov. 0, 00-00

4 Block Diagram Operation indicating lamp Handy Terminal or PC Input Input Input R R 0 R Low drift input processing circuit Micro-processor Computation I/O adjustments Insulation circuit circuit circuit Power supply circuit 8 9 L Power supply N GND Selection switch djustment switch R: External resister for current input External Dimensions Unit : mm Main unit Socket Receiving resistor* (for current input) (8.) Main unit fixing stopper (upper, lower) -. mounting holes (depth:.) 0 RES * () (.) 8 8 DIN rail -M. screws RES *.8 () (.) or less *: The receiving resistor is supplied for the input signal suffix code "" <Mounting Dimensions> or more or more -. or -M Note: When mounting the units close together, leave a space of at least mm between them. Use the supplied spacer to keep a space of mm for DIN rail mounting. 00. ll Rights Reserved. Copyright 00, Yokogawa Electric Corporation GS J0X-0E nd Edition Nov. 0, 00-00

5 Functions MXT- Free Program This computing unit is used to meet individual applications by programming the available commands. Initial Setting Program: s the value that corresponds to the input. MXT-R Temperature-Pressure Compensation This computing unit performs temperature-pressure of gas flow measured by differential pressure flow meter (Orifice, Bentury, Flow nozzle, etc.) using the following expressions (select either one). For temperature-pressure of gas flow measured by eddy current meter, use the MXT-T. With square root extraction or without square root extraction can be set for uncompensated flow input signal. If with square root extraction is selected for uncompensated flow input signal, it is shipped with the low-cut point of % and the hysteresis of 0.%. K X+ Y= K X () [with extraction of K X+ flow input signal] K X+ Y= () [without extraction K X+ K X of flow input signal] where Y (): Compensated flow output signal (%) X (Input-): Uncompensated flow input signal (%) X (Input-): Pressure input signal (%) X (Input-): Temperature input signal (%) K to K: Gain (no unit) and : Bias (%) Settings of gain and bias <For temperature-pressure > How to obtain K, K,, K, and : <For either temperature or pressure > When only the temperature is performed: Make for the pressure. That is, set K = 0, = 00% and use the expressions (d) and (e) to obtain other gain and bias. When only the pressure is performed: Make for the temperature. That is, set K = 0, = 00% and use the expressions (b) and (c) to obtain other gain and bias. Setting range of gain: 0 to +0 Number of significant digits: Minimum unit: Setting range of bias: 000 to +000% Number of significant digits: Minimum unit: 0.00% input-, input-, and input- signals between 0%and 00%. Setting range of low-cut point: 0 to 00% Number of significant digits: Minimum unit: 0.00% Setting range of hysteresis: 0 to 00% Number of significant digits: Minimum unit: 0.00% Computation accuracy: ±0.% (However, input (X) vs. output when K = K = K =, = = 0%, and inputs (X, X) are fixed at 00%.) Gain: K =, K =, and K = Number of significant digits: (e.g.. unacceptable;.,., 0.0 acceptable) Bias: = 0% and = 0% Number of significant digits: (e.g..% unacceptable;.,., 0.0% acceptable) Without extraction of flow input signal. Shipped with the expression (). K= Uncompensated flow input span Compensated flow input span (a) Maximum value Minimum value (of pressure transmitter range) K= (b) Reference pressure (kpa) + 0. = Minimum value (of pressure transmitter range) + 0. Reference pressure (kpa) + 0. (c) Maximum value Minimum value (of temperature range) K= (d) Reference temperature C +. = Minimum value (of temperature range) +. Reference temperature C +. (e) Pressure Temperature ll Rights Reserved. Copyright 00, Yokogawa Electric Corporation GS J0X-0E nd Edition Nov. 0, 00-00

6 MXT-S ddition / Subtraction This computing unit adds and subtracts three inputs using the following expression. Y = K {K(X+) + K(X+) + K(X+)} + where Y (): signal (%) X to X (Input- to Input-): Input signal (%) K to K: Gain (no unit) to : Bias (%) Set 0 for K, K, and K of the unused input circuit. Not necessary to specify,, and of the circuit. Setting range of gain: 0 to +0 Number of significant digits: Minimum unit: Setting range of bias: 000 to +000% Number of significant digits: Minimum unit: 0.00% input-, input-, and input- signals between 0%and 00%. Computation accuracy: ±0.% (However, when K = 0., K = 0., K = 0., K =, and = = = = 0%.) Gain: K = 0., K = 0., K = 0., and K = Number of significant digits: (e.g.. unacceptable;.,., 0.0 acceptable) Bias: = 0%, = 0%, = 0%, and = 0% Number of significant digits: (e.g..% unacceptable;.,., 0.0% acceptable) MXT-T Multiplication / Division This computing unit inputs three signals, multiplies and divides the three input signals using the following expressions. The unit can perform temperature-pressure by inputting gas flow signal measured by eddy current meter etc., temperature signal, and pressure signal as three input signals. Y=K (K X+) (K X+) (K X+) + where Y (): signal (%) X to X (Input- to Input-): Input signal (%) K to K: Gain (no unit) to : Bias (%) Settings of gain and bias For temperature-pressure of gas flow measured by eddy current meter etc., use the following expressions to obtain each gain and bias. <For temperature-pressure > How to obtain K,, K,, K,, K, and : K= since the output value of flow transmitter is used as it is. = 0% since the output value of flow transmitter is used as it is. Use the aforementioned expression (b) to obtain K. Use the aforementioned expression (c) to obtain. Use the aforementioned expression (d) to obtain K. Use the aforementioned expression (e) to obtain. K = Uncompensated flow input span Compensated flow input span = 0% since the compensated flow value is normally used as it is. Pressure Temperature <For either temperature or pressure > When only the temperature is performed: Make for the pressure item. That is, set K = 0, = 00% and use the aforementioned expressions (d) and (e) to obtain other gain and bias. When only the pressure is performed: Make for the temperature item. That is, set K = 0, = 00% and use the aforementioned expressions (b) and (c) to obtain other gain and bias. Note: Set K = 0 and = 00% when using this unit as multiplier. Setting range of gain: 0 to +0 Number of significant digits: Minimum unit: Setting range of bias: 000 to +000% Number of significant digits: Minimum unit: 0.00% input-, input-, and input- signals between 0%and 00%. Computation accuracy: ±0.% (However, input (X) vs. output when K = K = K = K =, = = = = 0%, and inputs (X, X) are fixed at 00%.) Gain: K =, K =, K =, and K = Number of significant digits: (e.g.. unacceptable;.,., 0.0 acceptable) Bias: = 0%, = 0%, = 0%, and = 0% Number of significant digits: (e.g..% unacceptable;.,., 0.0% acceptable) ll Rights Reserved. Copyright 00, Yokogawa Electric Corporation GS J0X-0E nd Edition Nov. 0, 00-00

7 MXT-U Square Root Extraction This computing unit extracts square root of three inputs using the following expression. low-cut point can be set for the computation result. It is shipped with the low-cut point of %. Y= K (K X+) (K X+) (K X+) + where Y (): signal (%) X to X (Input- to Iinput-): Input signal (%) K to K: Gain (no unit) to : Bias (%) Set K = 0, = 00% when no division is carried out. Setting range of gain: 0 to +0 Number of significant digits: Minimum unit: Setting range of bias: 000 to +000% Number of significant digits: Minimum unit: 0.00% input-, input-, and input- signals between 0%and 00%. Setting range of low-cut point: 0 to 00% Number of significant digits: Minimum unit: 0.00% Computation accuracy: ±0.% (However, input (X) vs. output when K = K = K = K =, = = = = 0%, and inputs (X, X) are fixed at 00%.) Gain: K =, K =, K =, and K = Number of significant digits: (e.g.. unacceptable;.,., 0.0 acceptable) Bias: = 0%, = 0%, = 0%, and = 0% Number of significant digits: (e.g..% unacceptable;.,., 0.0% acceptable) MXT-V High Selector This computing unit selects the highest signal out of three input signals (X, X, and X) or out of two input signals (X and X) to output it (Y). Ordering Information Number of inputs: e.g. -input high selector MXT-W Low Selector This computing unit selects the lowest signal out of three input signals (X, X, and X) or out of two input signals (X and X) to output it (Y). Ordering Information Number of inputs: e.g. -input low selector The information covered in this document is subject to change without notice for reasons of improvements in quality and/or performance. ll Rights Reserved. Copyright 00, Yokogawa Electric Corporation GS J0X-0E nd Edition Nov. 0, 00-00

General Specifications

General Specifications GS 77J04H0-0E Model MH Isolator (Free Range Type) General The MH is a plug-in type isolator that converts DC current or DC voltage signals into isolated DC current or DC voltage