User`s Manual
Contents
1. e If there is any risk of a surge being induced into the power line and or signal lines due to lightning or other factors a dedicated lightning arrester should be used as protection for both this com puting unit and a field installed device Operating temperature humidity range 0 to 50 C 5 to 90 RH no condensation 3 EXTERNAL WIRING N WARNING To avoid the risk of an electric shock turn off the power supply and use a tester or similar device to ensure that no power is supplied to a cable to be connected before carring out wiring work Wires are connected to the terminals of the computing unit s socket M3 5 screw terminals are provided for the connection of external sig nals Attach a crimp on lug to each wire for connection to the termi nals Recommended cables A nominal cross sectional area of 0 5 mm or thicker for signal cables and that of 1 25 mm or thicker for power cables Receiving resistor for current input Power supply Input 1 L amp leue N R SEN MS E GND i cQ 8 7 SIS R Receiving resistor BL 6 RES for current input 1 K O o 4 oO ow 4 O SOs Input 2 O cQ I y oo 9 3 9 3 3 19 5 Aye n OH IDE 5 R Receiving resistor f for current input Input 3 Output 6 A R X11 R Receiving resistor2. Output signal 96 X1 to X3 Input 1 to Input 3 Input signal 96 K1 to K4 Gain no unit A1 to A4 Bias 96 With input limit function Low limit 096 high limit 10096 Gain setting K1 to K4 Set the gain K1 to K4 in the fixed con stants H01 to H04 K1 to K4 320 corresponds to H01 to HO4 32000 Setting range 320 to 320 Number of significant digits 4 Minimum unit 0 00001 Bias setting A1 to A4 Set the bias A1 to A4 in the fixed con stants H05 to H08 A1 to A4 32000 corresponds to H05 to HO8 32000 Setting range 32000 to 32000 Number of significant digits 4 Minimum unit 0 00196 Decide gain and bias so as not to exceed 3 4x10 8 during compu tation Gain bias and computation results are 4 significant digits Limit of input signal The input limit function limits the input signals X1 to X3 between 096 and 100 Set the input limit function in the fixed constant H09 With input limit function HO9 100 Without input limit function HO9 0 The fixed constants H01 to H09 can be changed using the Handy Terminal Computation accuracy 0 1 However when K120 5 K2 0 25 K3 0 25 K4 1 and A1 A2 A3 A4 0 6 4 MXT T Multiplication Division This computing unit inputs three signals multiplies and divides the three input signals using the following expressions With input limit function or without input limit function can be set for the input signals X1 X2 and X3 K1 X1 A1 K2
3. X2 A2 K3 X3 A3 where Y Output Output signal 96 X1 to X3 Input 1 to Input 3 Input signal 96 K1 to K4 Gain no unit A1 to A4 Bias 96 With input limit function Low limit 0 high limit 100 Gain setting K1 to K4 Set the gain K1 to K4 in the fixed con stants H01 to H04 K1 to K4 320 corresponds to H01 to HO4 32000 Setting range 320 to 320 Number of significant digits 4 Minimum unit 0 00001 Bias setting A1 to A4 Set the bias A1 to A4 in the fixed con stants H05 to H08 A1 to A4 32000 corresponds to H05 to HO8 32000 Setting range 32000 to 32000 Number of significant digits 4 Minimum unit 0 00196 Y K4 A4 Decide gain and bias so as not to exceed 3 4x10 during compu tation Gain bias and computation results are 4 significant digits Limit of input signal The input limit function limits the input signals X1 to X3 between 096 and 100 Set the input limit function in the fixed constant H09 With input limit function HO9 100 Without input limit function HO9 0 The fixed constants H01 to H09 can be changed using the Handy Terminal Computation accuracy 0 1 However input X1 vs output when K1 K2 K3 K4 1 and A1 A2 A3 A4 0 and inputs X2 X3 are fixed at 100 IM 77J04X13 01E 2nd Edition Nov 30 2005 00 65 MXT U Square Root Extraction This computing unit extracts square root of three inputs using the fol lowing expression With input limit fu
4. 095 Number of significant digits 4 Minimum unit 0 001 Decide gain and bias so as not to exceed 3 4x10 during compu tation Gain bias and computation results are 4 significant digits Square root extraction of uncompensated flow input signal When extracting the square root of an uncompensated flow input signal X1 set in the fixed constant HO6 The lowcut point and hysteresis shown below can be set in the fixed constants H07 H08 Extract H06 100 Not extract H06 0 e g Set HO7 1 to set the lowcut point 1 Set H08 0 5 to set the hysteresis 0 5 Operation when extracting the square root of an uncompen sated flow input signal Output signal Input signal X Hysteresis Lowcut point Limit of input signal The input limit function limits the input signals X1 to X3 between 096 and 100 Set the input limit function in the fixed constant H09 With input limit function HO9 100 Without input limit function HO9 0 The fixed constants H01 to H09 can be changed using the Handy Terminal Computation accuracy 0 196 However input X1 vs output when K1 K2 K3 1 A2 A3 0 and inputs X2 X3 are fixed at 100 6 3 MXT S Addition Subtraction This computing unit adds and subtracts three inputs using the follow ing expression With input limit function or without input limit function can be set for the input signals X1 X2 and X3 Y K4 K1 X1 A1 K2 X2 A2 K3 X3 A3 A4 where Y Output
5. User s Manual Model MXT JUXTA Universal Computing Unit 3 input Isolated 1 output Type IM 77J04X13 01E Please read through this User s Manual before use for correct handling Please keep this User s Manual for future reference YOKOGAWA 4 Yokogawa Electric Corporation IM 77J04X13 01E 1st Edition Aug 2005 YK 2nd Edition Nov 2005 YK CAUTIONARY NOTES FOR SAFE USE OF THE PRODUCT This User s Manual should be carefully read before installing and oper ating the product The following symbol is used on the product and in this manual to ensure safe use gt This symbol is displayed on the product when it is necessary to refer to the User s Manual for information on personnel and instrument safety This symbol is displayed in the User s Manual to indicate precautions for avoiding danger to the operator such as an electric shock The following symbols are used only in this manual 4 IMPORTANT Indicates that operating the hardware or software in a particular manner may cause damage or result in a system failure NOTE gt Draws attention to essential information for understanding the operations and or functions of the product CHECKING PRODUCT SPECIFICATIONS AND PACKAGED ITEMS 1 Checking the Model and Product Specifications Check that the model and specifications indicated on the nameplate attached to the main unit are as ordered 2 Packaged Items Check that the package contains the
6. ctory 7 2 MXT for the function suffix code A Parameter Display stem A bisPLaYN Dispayi rae bo Digtaoupt B bisPLAa Dispay2 B12 B13 B14 bo Ditaloupa o B17 Load factor O Self check result 2 3 Comment 4 Comment 0 2 5 6 8 9 6 7 Self check result o Program O 5 5 6 1 Z O 2 PROGRAM Program 8 Program 9 Program O Self check result Fixed constant 2 Fixed constant a EE 8 Fixed constant 9 Fixed constant 0 Self check result ADJUST Adjustment PO P10 Pn P12 3 2 P27 Self check result 03 Self check result B6 DO DO DO DO D2 D2 D2 D2 D3 D3 D4 D4 G G G G G HO HO H5 H5 H6 O IM 77J04X13 01E 2nd Edition Nov 30 2005 00 8 MAINTENANCE The product starts running immediately when the power is turned on however it needs 10 to 15 minutes of warm up before it meets the specified performance 8 1 Calibration Apparatus A DC voltage current standard Yokogawa 7651 or the equivalent A digital multimeter Yokogawa 7561 or the equivalent A precision resistor of 250 Q 0 01 1 W Setting tool for adjustment Refer to 4 2 Connector for Communi cation in this manual ed N Calibration Procedure 1 Connect the instruments as shown below 2 Use the DC voltage current standard and apply input signals equivalent to 0 25 50 75 and 100 of input span to the comput ing unit 3 Check to see the output values obtained fro
7. e at 500 V DC between input output power sup ply and grounding terminals mutually Each input terminal is not isolated mutually Withstand voltage 2000 V AC for 1 minute between input output power supply and grounding terminals mutually 4 DESCRIPTION OF FRONT PANEL The figure below shows the computing unit of which the front panel cover is open Connector for communication Operation indicating lamp Selection switch Turns on at power on Adjustment switch 4 1 X Operation Indicating Lamp The operation indicating lamp shows the operation status abnormali ties in a setting and adjustment operation status by the adjustment switch on the front panel 1 When the lamp is lit Power is turned on and the computing unit is in the normal status provided that the selection switch is set to the position 0 2 When the lamp is blinking rapidly The lamp repeats the rapid blinking until the internal processing is completed during output adjustment by the adjustment switch 3 When the lamp is blinking slowly The lamp repeats the slow blinking until the computing unit re gains its normal status when the following abnormalities occur Abnormalities in a parameter setting The selection switch is set to the positions other than 0 4 2 Connector for Communication Use the connector for communication when setting the parameters us ing a PC VJ77 Param
8. e selection switch to 1 Then turn the adjustment switch clockwise to increase the output or turn it counterclockwise to de crease the output 2 Output span adjustment Turn the selection switch to 2 Then turn the adjustment switch clockwise to increase the output or turn it counterclockwise to de crease the output A NOTE e Be sure to set the selection switch back to the position 0 after each adjustment Otherwise it may cause an incorrect operation or malfunction because the positions other than 0 are adjustment modes e When the selection switch is set to the positions other than 0 the setting tool can not be used for the setting 5 SETTING PARAMETERS Set the parameters using a PC VJ77 Parameters Setting Tool or the Handy Terminal Refer to 7 List of Parameters in this manual and the User s Manual for VJ77 PC based Parameters Setting Tool IM 77J01J77 01E or the User s Manual for JHT200 Handy Terminal IM JF81 02E Parameters are indicated inside the ll Setting Input Range Set the 0 value of input range in D25 INPUT L_RNG and the 100 value of input range in D26 INPUT H_RNG f NOTE Changing the input range resets the input adjusted value E Setting Output Range Set the 096 value of output range in D38 OUT1 L_RNG and the 100 value of output range in D39 OUT1 H RNG f NOTE Changing the output range resets the output adjusted value IM 77J04X13 01E 2nd Editio
9. eters Setting Tool or the Handy Terminal lt How to connect with the setting tool JUXTA communication cable with 5 pin connector F9182EE Provided with VJ77 and JHT200 JHT200 Handy Terminal Modular jack conversion adapter E9786WH Provided with VJ77 Dedicated adapter E9789HA Provided with VJ77 Dedicated cable E9786WK Provided with VJ77 PC which is installed wittig ydy Use the VJ77 of version R1 04 or later 4 3 Selection Switch and Adjustment Switch The following adjustments can be performed using the switches on the front panel selection switch and adjustment switch without the dedi cated setting tool refer to 4 2 Connector for Communication The adjusted value is saved about 1 second after operating the adjust ment switch Also when the rotation direction of the adjustment switch is changed the adjusted value becomes effective about 1 second after the change Position of selection switch Item to be adjusted No function Output zero adjustment Output span adjustment No function No function No function 7 Rotation direction of adjustment switch i Adjustment operation Increase of output adjusted value NS Counterclockwise Decrease of output adjusted value Adjusted volume by the adjustment switch One click changes about 0 005 of output range 4 3 1 Adjusting Output Using the Switches on the Front Panel 1 Output zero adjustment Turn th
10. following items MXT 1 Range label 1 Spacer 1 Receiving resistor for current input 3 User s Manual this manual IM 77J04X13 01E 1 When the optional specification R250 is specified the 250 Q receiving resistor is attached When the optional specification R250 is not specified the 100 Q receiving resistor is attached 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 Yokogawa Electric Corporation Network Solutions Business Division 2 9 32 Naka cho Musashino shi Tokyo 180 8750 Japan Phone 81 422 52 7179 Facsimile 81 422 52 6793 MODEL AND SUFFIX CODES MXT LILILIN O B L Model Function A Free program R Temperature pressure compensation S Addition Subtraction T Multiplication Division U Square root extraction V High selector W Low selector Input signal A 0 to 50 mA DC 1 10 to 10 V DC Span is 1 mA or more Span is 0 1 V or more Output signal A 0 to 20 mA DC Span is 2 mA or more B 0to 5 mADC Span is 1 mA or more 1 Oto 10 V DC Span is 0 1 V or more 2 Oto 100 mV DC Span is 10 mV or more 3 10to 10 VDC Span is 0 2 V or more 4 100 to 100 mV DC Span is 20 mV or more Power supply 1 15 40 V DC Operating range 12 to 48 V DC 2 100 240 V AC Operating range 85 to 264 V AC Optional specificatio
11. for current input 4 IMPORTANT e The power line and input output signal lines should be installed away from noise generating sources Other wise accuracy cannot be guaranteed The grounding resistance must be 100 Q JIS Class D grounding The length and thickness of the grounding cable should be as short and thick as possible Directly connect the lead from the ground terminal terminal no 9 of the product to the ground Do not carry out daisy chained inter ground terminal wiring Use of the product ignoring the specifications may cause overheating or damage Before turning on the power ensure the following a Power supply voltage and input signal value applied to the product should meet the required specifications b The external wiring to the terminals and wiring to ground are as specifications Do not operate the product in the presence of flammable or explosive gases or vapors To do so is highly dangerous The product is sensitive to static electricity exercise care in operating it Before you operate the product touch a nearby metal part to discharge static electricity IM 77J04X13 01E 2nd Edition Nov 30 2005 00 Power Supply and Isolation Power supply rated voltage 15 40 V DC or 100 240 V AC 50 60 Hz Power supply input voltage 15 40 V DC 2095 or 100 240 V AC 15 10 50 60 Hz Power consumption 24 V DC 1 9 W 100 V AC 3 6 VA 200 V AC 5 2 VA Insulation resistance 100 MO or mor
12. inal Computation accuracy 0 196 However input X1 vs output when K1 K2 K3 K4 1 and A1 A2 A3 A4 0 and inputs X2 X3 are fixed at 100 6 6 MXT V High Selector This computing unit selects the highest signal out of three input sig nals X1 X2 and X3 or out of two input signals X1 and X2 to output it Y oet the high selector of three inputs or two inputs in the fixed constant H01 3 input high selector HO1 0 2 input high selector HO1 200 6 7 MXT W Low Selector This computing unit selects the lowest signal out of three input signals X1 X2 and X3 or out of two input signals X1 and X2 to output it Y oet the low selector of three inputs or two inputs in the fixed constant HO1 3 input low selector HO1 0 2 input low selector HO1 200 5 IM 77J04X13 01E 2nd Edition Nov 30 2005 00 7 LIST OF PARAMETERS 7 1 MXT except for the function suffix code A Parameter Display Wem A 2 no 2l 08 INPUTS 05 5 5 A58 60 01 0 0 B05 B60 0 p02 0 0 20 2 2 26 INPUT H RNG 38 2 0 H02 Fixed constant rs M QUEM 5 H59 60 ADJUST Adjustment POS 26 P27 Q03 Self check result gt gt OR g UJ UJ NO C3 OU UO AC Jojolo O O1 PO D J RICO I I Co S9 99 2 Co n o 1 The displayed status is to let the service staff know the past records of the product 2 The parameters are the items to be set at the fa
13. m the computation of each input are within the specified accuracy rating R is used for current output Use the setting tool VJ77 Parameters Setting Tool or JHT200 Handy Terminal or the switches on the front panel selection switch and adjustment switch to adjust the input output signals Input Adjustment Procedure 1 Input the value equivalent to 0 value of input range 2 Call the display item A DISPLAY1 to check the input value in A01 INPUT1 3 If the adjustment is necessary call the adjustment item P AD JUST 4 Select P08 IN1 ZERO ADJ to enter the adjustment mode Select EXECUTE adjustment for adjustment If RESET is selected the adjusted value is reset to the factory set default 5 Input the value equivalent to 10096 value of input range 6 Call the display item A DISPLAY1 to check the input value in A01 INPUT1 7 If the adjustment is necessary call the adjustment item P AD JUST 8 Select P09 INT SPAN ADJ to enter the adjustment mode Select EXECUTE adjustment for adjustment If RESET is selected the adjusted value is reset to the factory set default Input 2 and Input 3 can be adjusted by the same operation as the above Output Adjustment Procedure 1 When adjusting 0 value of output call the adjustment item P ADJUST to select P26 OUT1ZERO ADJ 2 If there is a positive deviation correct it by setting a negative value to offset the deviation If there is a negati
14. n R250 With 250 Q receiving resistor 1 MOUNTING METHOD f NOTE Plug disconnect the main unit into from the socket vertically to the socket face Otherwise the terminals may bend and it may cause bad contact 1 1 Wall Mounting Unfasten the upper and lower stoppers of the computing unit to discon nect the main unit from the socket Next anchor the socket onto the wall with two M4 screws Then plug the main unit into the socket and secure the main unit with the upper and lower stoppers Stopper Mounting Screws Mounting Dimensions Unit mm Pitch 56 or more Note e When mounting the computing units close together leave a space of at least 5 mm between them Use the supplied spacer to keep a space of 5 mm for DIN rail mounting Socket 2 4 5 or 2 M4 1 2 DIN Rail Mounting Locate the computing unit so that the DIN rail fits into the upper part of the DIN rail groove at the rear of the socket and fasten the socket us ing the slide lock at the lower part of the socket Slide lock 1 3 Using Ducts Wiring ducts should be installed at least 30 mm away from the top or bottom of the main unit 2 INSTALLATION LOCATIONS Avoid the following environments for installation locations Areas with vibration corrosive gases dust water oil solvents di rect sunlight radiation a strong electric field and or a strong magnetic field Installation altitude 2000 m or less above sea level
15. n Nov 30 2005 00 6 COMPUTING FUNCTIONS 6 1 MXT A Free Program This computing unit is used to meet individual applications by pro gramming the available commands using a PC VJ77 Parameters Setting Tool or the JHT200 Handy Terminal Set the computing pro gram in G01 to G59 6 2 MXT R Temperature Pressure Compensation This computing unit performs temperature pressure compensation for ideal gas of differential pressure flow meter using the following expressions With input limit function or without input limit function can be set for the input signals X1 X2 and X3 K2 X2 A2 Y KIX A3 K VX1 1 with square root extraction of flow input signal K2 X2 A2 l Y K3 X34A3 K1 X1 2 without square root extraction of flow input signal where Y Output Compensated flow output signal 96 X1 Input 1 Uncompensated flow input signal 96 X2 Input 2 Pressure input signal 96 X3 Input 3 Temperature input signal 96 K1 to K3 Gain no unit A2 and A3 Bias 96 With input limit function Low limit 0 high limit 100 Gain setting K1 to K3 Set the gain K1 to K3 in the fixed con stants H01 to H03 K1 to K3 320 corresponds to H01 to HO3 32000 Setting range 320 to 320 Number of significant digits 4 Minimum unit 0 00001 Bias setting A2 A3 Set the bias A2 A3 in the fixed constants H04 H05 A2 A8 32000 corresponds to H04 HO5 32000 Setting range 32000 to 43200
16. nction or without input limit function can be set for the input signals X1 X2 and X3 And lowcut point can be set for the computation result _ K1 X1 A1 K2 X2 A2 K3 X3 A3 where Y Output Output signal 96 X1 to X3 Input 1 to Input 3 Input signal 96 K1 to K4 Gain no unit A1 to A4 Bias 96 With input limit function Low limit 0 high limit 100 Gain setting K1 to K4 Set the gain K1 to K4 in the fixed con stants H01 to H04 K1 to K4 320 corresponds to H01 to HO4 32000 Setting range 320 to 320 Number of significant digits 4 Minimum unit 0 00001 Bias setting A1 to A4 Set the bias A1 to A4 in the fixed con stants H05 to H08 A1 to A4 32000 corresponds to H05 to HO8 32000 Setting range 32000 to 3200095 Number of significant digits 4 Minimum unit 0 00196 Lowcut point setting Set the lowcut point in the fixed constant H09 Setting range 0 to 100 if the computation result is the lowcut point or less Input X1 Output Y1 Y 4 K4 A4 Decide gain and bias so as not to exceed 3 4x10 during compu tation Gain bias and computation results are 4 significant digits Limit of input signal The input limit function limits the input signals X1 to X3 between 096 and 100 Set the input limit function in the fixed constant H10 With input limit function H10 100 Without input limit function H10 0 The fixed constants H01 to H10 can be changed using the Handy Term
17. ve deviation cor rect it by setting a positive value The 100 value of output can be adjusted by the same operation as the above For adjustment using a setting tool refer to the User s Manual for each setting tool and 7 List of Parameters in this manual For adjustment using the switches on the front panel refer to 4 3 Selection Switch and Adjustment Switch User s Manual for VJ77 Document No IM 77J01J77 01E how ever use the VJ77 of version R1 04 or later User s Manual for JHT200 Document No IM JF81 02E Receiving resistor for current input DC voltge 9 current E standard R Receiving resistor for current input DC voltge 9 current E standard R Receiving resistor for current input OF ER DMM o R 250 Q precision resistor for current output R 6 3 H 4 DC voltge 9 410 current E R standard D R Receiving resistor for current input 7 IM 77J04X13 01E 2nd Edition Nov 30 2005 00 IM 77J04X13 01E 2nd Edition Nov 30 2005 00
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