YOKOGAWA VJS7 Manuals

Instruction Manual Model VJS7 Potentiometer Transmitter IM 77J01S07-01E IM 77J01S07-01E 1st Edition Jan. 2000 Yokogawa M&C Corporation Kojimachi Tokyu Bldg. (3F) Kojimachi 6-6 Chiyoda-ku, Tokyo, 102 Japan Tel: 81-3-3239-0576 Fax: 81-3-3239- 0585 4. MOUNTING METHODS 4.1 Wall Mounting Loosen the main unit-fixing screw of the transmitter to disconnect the main unit from the socket. Next, anchor the socket onto the wall with screws. Then, plug the main unit into the socket and se- cure the main unit with the main unit-fixing screw. Main unit-fixing screw Socket Main unit Threaded hole for fixing the main unit Mounting screws Fig. 4.1 4.1.1 Mounting Dimensions Unit: mm 29.5 or more 22±0.2 59±0.3 2-M4 or 2-ø4.5 or more Fig. 4.2 4.2 DIN Rail Mounting Locate the transmitter 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 using the slide lock at the lower part of the socket. Slide lock DIN rail DIN rail VIEW A (Rear of socket) VIEW A Fig. 4.3 1. CAUTIONARY NOTES FOR SAFE USE OF THE PRODUCT For the correct use of this product, read through this manual before use. The following safety symbol is indicated on the product to en- sure safe use. CAUTION If this symbol is indicated on the product, the operator should refer to the explanation given in the instruction manual in order to avoid personnel injury or death to either themselves or other personnel, and/or damage to the instru- ment. The manual describes the special care the operator should exercise to avoid shock or other dangers that may re- sult in injury or loss of life. The following symbol marks are used only in this manual. IMPORTANT Indicates that operating the hardware or software in a par- ticular manner may damage it or result in a system failure. NOTE Draws attention to information that is essential for under- standing the operations and/or features of the product. 2. CHECKING PRODUCT SPECIFI- CATIONS AND THE CONTENTS OF PACKING (1) Model Number and Specification Check Check that the model number and specifications shown on the nameplate attached on the side of the product are as ordered. (2) Contents of the Packing Check that the packing contains the following items: G VJS7 main unit, 1 G Instruction Manual (IM 77J01S07-01E), 1 Accessories: G Tag number label, 1 3. GENERAL This plug-in type transmitter is used in combination with transmitters which send displacement information of regulator valves by resis- tance change signals from a potentiometer, and converts the resis- tance change into isolated DC current or DC voltage signals. • Output-2 can be selected from DC voltage signal, DC current signal, communication output (RS-485), or alarm output (2 re- lay contacts). Keep this manual in a safe place. 2 All Rights Reserved. Copyright © 1999, Yokogawa M&C Corporation IM 77J01S07-01E 3rd Edition Mar.31,1997-00 4.3 Mounting Using a Multi-mounting Base For mounting using a multi-mounting base, see the Instruction Manual for VJCE (VJ Mounting Base). 4.4 Using Ducts Wiring ducts should be installed at least 30 mm away from the top or bottom of the main unit. 4.5 In case of top-and-bottom close mounting Transmitter should be mounted horizontally with its top and bot- tom slits being vertical. The top and bottom slits should not be covered. The area for wiring is required above and below the transmitter (the area with slant lines). ALM1 ALM2 ALM1 ALM2 ALM1 ALM2 ALM1 ALM2 ALM1 ALM2 ALM1 ALM2 (29.5) 29.5 or more 40 or more 40 or more (72) (72) 78 or more 150 or more Fig. 4.3 5. INSTALLATION LOCATION • For installation, avoid any location where the product may be subject to vibrations, corrosive gases, or large amounts of dust, or where the product is exposed to water, oil, solvents, direct sunlight, radioactive rays, or strong electric or magnetic fields. • If there is a possibility that lightning could induce a high surge voltage on the power and signal lines, provide lightning arrest- ers on the line between the field instrument and indoor instru- ment in order to protect the product. Install a dedicated ar- rester on the field side and another on the indoor side. 6. EXTERNAL WIRING WARNING Turn OFF the power supply and make sure that none of the cables are not in the hot-line state before carrying out the wiring to avoid the possibility of electric shock. Wires are connected to the terminals of the isolator’s socket. M3 screw terminals are provided for the connection of external signals. Attach a crimp-on lug to each wire for connection to the terminals. • Recommended cables: A nominal cross-sectional area of 0.5 mm2 or thicker for signal cables, and that of 1.25 mm2 or thicker for power cables, and shielded twisted-pair cables (AWG24) for communication wiring cables. • For mounting, use M3 screws and crimp-on terminals with in- sulating sleeves appropriate for the wires used. Tool of the crimp-on terminals to be used should be appropri- ate for the crimp-on terminals. • Mount a breaker on the external place. Mount a switch or 5A circuit breaker on the place near by the instrument, within operator’s reach. And attach the indication that it is for disconnecting the instrument. 10 11 3 2 1 4 5 6 7 8 9 5 2 6 3 1 4 Input signai 9 7 + – Analog output Output-1 signal 5 2 + – Analog output Output-2 signal ALM1 ALM2 COM Alarm output 5 2 6 B+ A– COM RS-485 communication 100% 0% Power supply 11 10 8 L+ N– GND Fig. 6.1 NOTE G Keep all sources of noise away from the power and sig- nal cables. Otherwise, accuracy cannot be assured. G Provide grounding to a grounding resistance of 100 V. The length of the grounding cable should be 20 m or less. Directly connect the lead from the ground terminal (terminal no. 8) of the isolator to the ground. Do not carry out daisy-chained inter-ground terminal wiring. G Direct Current G “Overvoltage category (Installation category)” describes a number which defines a transient overvoltage condi- tion. It implies the regulation for impulse withstand volt- age. “II” applies to electrical equipment which is sup- plied from the fixed installation like distribution board. G “Pollution degree” describes the degree to which a solid, liquid, or gas which deteriorates dielectric strength or surface resistivity is adhering. “2” applies to normal in- door atmosphere. Normally, only non-conductive pollu- tion occurs. Occasionally, however, temporary conduc- tivity caused by condensation must be expected. G Rated fuse of 125VDC, 1A is stored. However, opera- tors can not replace the fuse. 3 All Rights Reserved. Copyright © 1999, Yokogawa M&C Corporation IM 77J01S07-01E 3rd Edition Mar.31,1997-00 IMPORTANT G If this instrument is used in a manner not sepecified in this manual, the protection provided by this instrument may be impaired. G If the product is operated by a power supply exceeding the specifications, the product may become extremely hot and, as a result, damaged. To prevent this, ensure the following before turning on the power. (a) The voltage of the supplied power and the input signal level meet the specifications of the product. (b) External wires are connected to the correct termi- nals (refer to Chapter 5). G Do not operate the product in the presence of flammable or explosive gases or vapors. To do so is highly danger- ous. G 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. DESCRIPTION OF FRONT PANEL AND CONNECTION OF SETTING TOOLS 7.1 Front Panel The communications connector in the front panel is used for set- ting up parameters through a PC (VJ77 PC-based Parameters Set- ting Tool) or the Handy Terminal. The alarm-1 and alarm-2 LEDs light up if an alarm occurs (those LEDs are provided only when the output-2 is specified for alarm output). ALM1 ALM2 Alarm-1 LED (lights up if an alarm occurs) Communications connector (for connecting the Handy Terminal) Alarm-2 LED (lights up if an alarm occurs) * The LEDs are provided only when output-2 is specified for alarm output. Fig. 7.1 Front Panel 7.2 Connecting the Setting Tools Connect the modular jack-to-connector adapter (E9786WH) to the JUXTA communication cable with 5-pin connector (F9182EE) and then connect this adapter to the communication connector of JUXTA. JHT200 Handy Terminal JUXTA communication cable with 5-pin connectors (F9182EE) [Provided with VJ77, JHT200] Modular jack conversion adapter (E9786WH) [Provided with VJ77] Dedicated adapter (E9789HA) [Provided with VJ77] Dedicated cable (E9786WK) [Provided with VJ77] PC Fig. 7.2 Connecting the Setting Tools 8. SETTING PARAMETERS Set the parameters using a PC (VJ77 PC-based Parameter Setting Tool) or the Handy Terminal. Refer to the list of parameters in this manual and the Instruction Manual for Handy Terminal (IM JF81- 02E) or VJ77 PC-based Parameters Setting Tool (IM 77J01J77-01E). 8.1 Settings Related to Inputs and Outputs 8.1.1 Input range Set the input range in P10: ZERO ADJ1 (setting of 0% of input) and in P11: SPAN ADJ1 (setting of 100% of input). Refer to “6. External Wiring” of this manual, and connect the signal cable from potentiometer to VJS7. Input the value equivalent to 0% of input to VJS7, then, wait for 10 seconds. And select and set EXECUTE in P10: ZERO ADJ1. Also, input the value equivalent to 100% of input to VJS7, then, wait for 10 seconds. And set and select EXECUTE in P11: SPAN ADJ1. The input range is set after completing the above opera- tions. 8.1.2 Setting of Burnout Select and set OFF, UP, or DOWN in D30: BURN OUT. 8.1.3 Direction of Output Action Analog output signals can be reversed. To reverse the signal from output-1, set D38: OUT1 DR to REVERSE. For output-2, set D39 OUT2 DR to REVERSE. To return the output-1 signal to normal, set D38: OUT1 DR to DIRECT. For output-2, set D39: OUT2 DR to DIRECT. 8.2 Settings Related to Communication Function Set the following parameters when output-2 is specified for com- munication function. For more information on the communication function, see the Instruction Manual for VJ Series Communication Function (IM 77J1J11-01E). 8.2.1 Communication Protocol Set the communication protocol by selecting from among PC- LINK, PC-LINK WITH SUM, MODBUS ASCII, MODBUS RTU, and LADDER in F01: PROTOCOL. 8.2.2 Communication Address Set the address number of the isolator numerically in a range of 1 to 99 in F02: ADDRESS. 8.2.3 Baud Rate Set the baud rate by selecting from among 1200, 2400, 4800, and 9600 bps in F03: BAUD RATE. 8.2.4 Parity Select and set NONE, EVEN, or ODD in F04: PARITY. 8.2.5 Data Length Select and set 7 bits or 8 bits in F05: DATA LEN. 8.2.6 Stop Bit Select and set 1 bit or 2 bits in F06: STOP BIT. 8.3 Settings Related to Alarm Output Set the following parameters when output-2 is specified for alarm output. 8.3.1 Alarm Setpoints Set the alarm setpoints of alarm-1 and alarm-2 in E03: SET POINT1 and E04: SET POINT2 numerically. G Setting range: A range of 0 to 100% of input range G Setting resolution: 0.1%