Download Model 701955 Bridge Head/Model 701956 Bridge - Electro
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User’s Manual Yokogawa Electric Corporation Model 701955 Bridge Head (NDIS-120 Ω, Enhanced Shield) Model 701956 Bridge Head (NDIS-350 Ω, Enhanced Shield) IM 701955-01E 1st Edition Foreword Thank you for purchasing the bridge head (701955/701956). This User’s Manual contains useful information about the function, procedures in connecting the gauge, and handling precautions of the bridge head. To ensure correct use, please read this manual thoroughly before operation. Keep the manual in a safe place for quick reference in the event a question arises. Notes • The contents of this manual are subject to change without prior notice as a result of continuing improvements to the device’s performance and functions. • Every effort has been made in the preparation of this manual to ensure the accuracy of its contents. However, should you have any questions or find any errors, please contact your nearest YOKOGAWA dealer as listed on the back cover of this manual. • Copying or reproducing all or any part of the contents of this manual without YOKOGAWA’s permission is strictly prohibited. Revisions • 1st Edition: February, 2003 Disk No. DL40 1st Edition : February 2003 (YK) All Rights Reserved, Copyright © 2003 Yokogawa Electric Corporation IM 701955-01E 1 Checking the Contents of the Package Unpack the box and check the contents before using the device. If the contents are not correct or missing or if there is physical damage, contact the dealer from which you purchased them. Bridge Head Check that the model name given on the name plate match that on the order. When contacting the dealer from which you purchased the device , please quote the device No. MODEL SUFFIX MODEL SUFFIX NO. NO. Made in Japan Made in Japan Model Model Specifications Description 700955 700956 Bridge resistance 120 Ω Bridge resistance 350 Ω NDIS type, enchanced shield NDIS type, enchanced shield No. (Device number) When contacting the dealer from which you purchased the device, please quote this number. Standard Accessories NDIS cable (for 701955, 701956) B8023WN Length: 5 m 2 Attaching Plate B9947DU 2 Binding screws (M3 × 5 mm) This User’s Manual IM 701955-01E Conventions Used in this Manual and on the Device Symbols Used on the Device GND terminal The operator must refer to an explanation in the User’s Manual. Symbols Used in this Manual Note IM 701955-01E Provides important information for the proper operation of the device. 3 Contents Foreword ........................................................................................................................................ 1 Checking the Contents of the Package .......................................................................................... 2 Conventions Used in this Manual and on the Device ..................................................................... 3 4 1 2 Construction of the Device .................................................................................................. 5 Connecting the Strain Gauge .............................................................................................. 7 3 4 Fixing the Device in Place ................................................................................................. 10 Connecting to the Strain Instrument ................................................................................. 11 5 Specifications .................................................................................................................... 12 IM 701955-01E 1 Construction of the Device • The bridge head is a converter for inputting the amount of change of the resistance of the strain gauge to the amplifier. Six types of connection methods (single-gauge, single-gauge three-wire, adjacent-side two-gauge, opposed-side two-gauge, opposed-side two-gauge three-wire, and four-gauge) are supported by setting the switch. • Shielded cable (B8023WN) is used. Names of the Parts Cable B8023WN Connector* Switch Strain gauge connection terminal GND terminal Connect to a measuring instrument. * A connector recommended by JSNDI (The Japanese Society for Non-destructive Inspection) Terminals and Circuit Diagram GND terminal (Terminal number) Strain gauge conneciton terminal F Sense+ 4 1 2 3 4 5 6 7 8 5 4 1 Attachment screws Input– B 3 Bridge+ 3 1 6 2 8 D Input+ 7 2 ON Switch OFF SW 1 2 3 4 5 5 (Switch number) GND terminal NDIS connector Pin assignments of the NDIS connector (Bridge head side) Top view F A G B C E D Pin number A B C D E F G Signal name Bridge+ (Bridge voltage +) Input– (Measurement signal –) Bridge– (Bridge voltage –) Input+ (Measurement signal +) Floating common Sense+ (Sensing of the bridge voltage +) Sense– (Sensing of the bridge voltage –) connector shell* * The connector shell connects the bridge head to the cable’s shielding. IM 701955-01E C Bridge– G Sense– E Floating common Connector shell Terminal No. Signal name 1 Bridge+ 3 Input– 4 Sense+ 5 Bridge– (Sense–) 7 Input+ 1 through 8 are the terminal numbers. 1 through 5 are switch numbers. A through G are the connector pin numbers. 5 1 Construction of the Device Wiring for Accessory Cable B8023WN A wiring diagram for the accessory cable is given below. The connector shell connects to the shielding. B8023WN F A E F B D C A C D B F G E Bridge+ Bridge– Input+ Input– Sense+ Sense– Floating Common F A E F B D C A C D B F G E Twist Twist Twist Shell Bridge+ Bridge– Input+ Input– Sense+ Sense– Floating Common Shell Shield Note Check the shape and pin assignment of the connector before connecting it to the accessory cable. Circuit Diagram for Bridge Head and Measuring Instrument The circuit diagram below shows the bridge head connected to a measuring instrument (the DL750). Isolate the strain gauge before use. CAUTION Do not connect the strain gauge terminal to any items with electric potential. Measurement instrument (example: DL750) Bridge Head 701955/701956 Sense+ Strain gauge Bridge+ Bridge+ Bridge- R Input+ Input+ InputR SenseBridge- Sense- Case InputSense+ R GND terminal Sense+ Sense- B8023WN Floating Common The floating common of the module is grounded within the bridge head. *1 A C D B F G E Shell Bridge+ Twist BridgeInput+ Twist InputSense+ Twist SenseFloating Common Shield A C D B F G E Shell The shield is connected to the The connector shell bridge head case and the is connected to the measurement instrument case.*2 case potential of the bridge head.*2 + - Module 701270 Strain(NDIS) Bridge Power + - AD Sense+ Sense- All module signals are isolated. Floating Common The connector shell is connected to the case potential of the measurement instrument.*2 Case *1 The GND (floating common) of the module is connected to the case potential inside the bridge head. *2 The bridge head case, the cable shield, and the measurement instrument case are connected as measures against noise. 6 IM 701955-01E 2 Connecting the Strain Gauge The bridge head can support six types of connection methods: single-gauge, singlegauge three-wire, adjacent-side two-gauge, opposed-side two-gauge, opposed-side twogauge three-wire, and four-gauge. Do not connect the strain gauge terminal to any items with electric potential. CAUTION Do not connect the strain gauge terminal to any items with electric potential. Use the lead wires included with the strain gauge or wires meeting the following specifications to connect the strain gauge and the bridge head. • Usable wire: single wire φ 0.14 to 1.5 mm2, or stranded wire 0.14 to 1.5 mm2 (AWG26 to 16) • Normal length of bare wire : 6 mm • The connection diagrams of several typical gauge methods are indicated on the side of the bridge head. 2GAUGE 12 345 12 345 4GAUGE 1 2 3 4 5 6 7 8 ON OFF ON OFF 12 345 1 2 3 4 5 6 7 8 1 Bridge+ 2 3 Input4 5 Bridge6 7 Input+ 8 ON OFF 1GAUGE Note • • • • • Isolate the strain gauge before use. Make the wires between the strain gauge and bridge head as short as possible. Proper measurements may not be possible in an environment where electromagnetic interference exists. If you are shielding the strain gauge, connect the shield wire to the floating common terminal of the bridge head. For the handling of the strain gauge, see the instruction manual that came with the shield gauge. Single-gauge Method Strain gauge Bridge head terminals 1 2 3 4 5 6 7 8 ON OFF Strain gauge 4 1 Input– 3 Sense+ Bridge+ 6 2 7 Input+ 8 5 Sense– Bridge– 1 2 3 4 5 Switch setting of the bridge head IM 701955-01E 7 2 Connecting the Strain Gauge Single-gauge Three-wire Method Bridge head terminals 1 2 3 4 5 6 7 8 Strain gauge Sense+ 4 Strain gauge Bridge+ 1 6 3 2 Input– Input+ 8 ON Sense– Bridge– 5 OFF 7 1 2 3 4 5 Switch setting of the bridge head Adjacent-Side Two-gauge Method Strain gauge Bridge head terminals 1 Strain gauge 2 3 4 5 6 Input– 3 7 8 ON OFF 4 1 Sense+ Bridge+ 6 Input+ 8 Sense– Bridge– 5 1 2 3 4 5 7 Strain gauge Switch setting of the bridge head Opposed-Side Two-gauge Method Strain gauge Bridge head terminals 1 2 3 4 5 6 7 8 ON OFF 1 2 3 4 5 Strain gauge 4 1 Input– 3 Sense+ Bridge+ 2 6 5 Sense– Bridge– 7 Input+ Strain gauge Switch setting of the bridge head 8 IM 701955-01E 2 Connecting the Strain Gauge Opposed-Side Two-gauge Three-wire Method Bridge head terminals 1 2 3 4 5 6 7 8 Strain gauge 1 Input– 3 Sense+ Bridge+ 2 ON OFF 4 Strain gauge 6 7 Input+ 5 Sense– Bridge– Strain gauge 1 2 3 4 5 Switch setting of the bridge head Four-gauge Method Strain gauge Bridge head terminals 1 2 3 4 5 6 7 8 Sense+ 4 Strain gauge Bridge+ 1 Strain gauge Input– 3 ON OFF Input+ 5 1 2 3 4 5 Switch setting of the bridge head IM 701955-01E 7 Strain gauge Strain gauge Sense– Bridge– 9 3 Fixing the Device in Place If necessary, you can use the accessory attaching plate, B9947-DU, to fix the bridge head to the panel. 1. Align the small holes on the bottom side of the bridge head to the small projections of the attaching plate. 2. Screw the bridge head and the attaching plate together using the accessory binding screws (M3 × 5 mm). Bridge head Attaching plate B9947DU Projections Binding screws (M3 x 5mm) 10 IM 701955-01E 4 Connecting to the Strain Instrument The bridge head uses a NDIS connector*. The accessory cable, B8023WN, is used to connect to the strain instrument. * A connector recommended by JSNDI (The Japanese Society for Non-destructive Inspection) Strain instrument Bridge head Accessory cable B8023WN IM 701955-01E 11 5 Specifications Bridge resistance Model 701955: 120 Ω Model 701956: 350 Ω Applicable gauge methods Single-gauge Single-gauge three-wire Adjacent-side two-gauge Opposed-side two-gauge Opposed-side two-gauge three-wire Four-gauge Operating conditions Temperature: Humidity: 5 to 40°C 20 to 85% RH External dimensions Approx. 37(W) × 97(H) × 30(D) mm Weight Approx. 85 g (Bridge head only) Standard accessories Cable (part no.: B8023WN): Attaching plate (part no.: B9947DU): User’s manual: 1 piece, with NDIS connector, 5 m in length 1 piece, with two M3 binding screws 1 piece, this manual External drawings Bridge head 97 37 30 GAUGE SELECT OFF SW 1 2 3 4 5 ON 1 2 3 4 5 6 7 8 BRIDGE HEAD(120 ) (ENHANCED SHIELD) 85 Attaching plate 26.9 116.5 5 12 106.5 t = 1.5 IM 701955-01E YOKOGAWA ELECTRIC CORPORATION Headquarters 2-9-32, Nakacho, Musashino-shi, Tokyo, 180-8750 JAPAN Sales Headquarters 2-9-32, Nakacho, Musashino-shi, Tokyo, 180-8750 JAPAN Phone : 81-422-52-6194 Branch Sales Offices Nagoya, Osaka, Hiroshima, Fukuoka, Sapporo, Sendai, Ichihara, Toyoda, Kanazawa, Takamatsu, Okayama, and Kitakyusyu. 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