User`s Manual
Contents
1. User s Model VJA1 JUXTA Manual Distributor Isolated Single output and Isolated Dual output Types IM 77J01A01 01E Please read through this User s Manual before use for correct handling Please keep this User s Manual for future reference YOKOGAWA IM 77J01A01 01E Yokogawa Electric Corporation e Ee O 1 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 A 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 IMPORTANT Indicates that operating the hardware or software in a particular manner may cause damage or result in a system failure AN NOTE Draws attention to essential information for understanding the operations and or functions of the product 2 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 side face of the main unit are as ordered 2 Packaged Items Check that the packing carton contains the follo2. e DIN rail DIN rail Push Rear of the socket DIN rail Slide lock 4 3 Mounting Using a Multi mounting Base When using a multi mounting base see the User s Manual for VJCE VJCE Mounting Base 4 4 Using a Duct When using a wiring duct install the duct at leaset 30 mm away from the top and bottom faces of the main unit 5 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 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 unit and a field installed device 6 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 Wiring should be connected to the terminals on the socket of the prod uct The terminals for external connections are of M3 screws Use crimp on terminal lugs for connections to the terminals 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 When using When using Example to construct internal ext
3. efore it meets the specified performance 7 1 Calibration Apparatus A DC voltage current standard Yokogawa 7651 or the equivalent A digital multimater Yokogawa 7561 or the equivalent A precision resistor of 250 0 0 01 1 W 7 2 Calibration Procedure 1 Connect the instruments as shown below First adjust the output 1 signal and then the output 2 signal 2 Use the DC voltage current standard and apply input signals equivalent to 0 25 50 75 and 100 of the input span to the product Check to see the corresponding output voltages are 0 25 50 75 and 100 respectively and within the specified accu racy rating R is used for current output lf the output signals are out of the accuracy rating range adjust the output signal level using the zero and span adjustment vol umes on front face of the product With SINK current J A 2 N J N Output 2 Re Digital A multimater DHE a Digital O d multimater R 250 Q precision resistor for current output DC voltge ot 1 current standard 4 3 Without SINK current DC voltge 9 3 current standard 4 IM 77J01A01 01E 2nd Edition June 01 2004 00
4. ernal _ Intrinsically Safe System power supply power supply using Zener Barrier AY IMPORTANT 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 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 8 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 7 MAINTENANCE The product starts running immediately when the power is turned on however it needs 10 to 15 minutes of warm up b
5. wing items VJA1 1 Tag number label 1 sheet Users Manual this manual IM 77J01A01 01E 1 copy 3 GENERAL This plug in type distributor is used in combination with a two wire type transmitter to convert the transmitter s 4 to 20 mA DC signals into iso lated DC current or DC voltage signals 4 MOUNTING METHOD AN NOTE Insert pull out the main unit into from the socket vertically to the face of socket Otherwise the terminals are bent and it may cause a bad contact Yokogawa Electric Corporation Network Solutions Business Divisiion 2 9 32 Naka cho Musashino shi Tokyo 180 8750 Japan Phone 81 422 52 7179 Facsimile 81 422 52 6793 4 1 Wall Mounting Loosen the main unit fixing screw of the product and pull out the main unit from the socket Fix the socket on the wall with screws Next in sert the main unit into the socket and fasten the main unit with the main unit fixing screw Mounting Socket p Output 1 Zero adjustment volume Span adjustment volume L Output 2 JDA Zero adjustment volume IR Threaded hole for Span adjustment volume AN fixing the main unit D unit fixing i screw lt Mounting Dimensions gt l Unit mm 29 5 or more 59 0 3 4 2 DIN Rail Mounting Insert a DIN rail into the upper part of the DIN rail groove on the rear of the socket and then slide the slide lock at the lower part of the socket upwards until the socket is fixed into position as shown below Fit into her
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