User`s Manual
Contents
1. All Rights Reserved Copyright 2002 Yokogawa Electric Corporation F09 EPS IM 01B04S10 01E 2nd Edition March 25 2005 Terminal Assignments BARD 800 BARD 800 Terminal BARD 810 BARD 810 BARD 600 BARD 700 for transmitter for control Baa Symbol etc element for control for monitoring Intrinsically gt t Input z i Input t Output ti Input t safe terminals nput Input C B 1 A Nonhazardous 2 Output B Output Output Input Output Output terminals 3 B 2 Terminal re E Symbol BARD 820 BARD 830 Intrinsically A safe terminals B Input Output 1 Nonhazardous 2 ua Output 2l Input terminals i TN Power supply Power supply T06 EPS 1 Inthe BARD 700 the resistance between terminals A and 1 and that between terminals C and 3 are balanced Be careful when connecting the receiver instrument 2 signal conditioner card For details see the documentation for the receiver instrument used 3 Terminal 3 may also need to be used for some device connected such as the SDBT distributor or the EA1 EA2 or EA3 When connecting a BARD 820 to a receiver instrument having a feature to supply power to the connected field device such as a power distributor perform wiring in such a way that the distributor s internal DC power supply is not used and the barrier is connected to both ends of2. and 100 of the span and check that the error in the output level is always within 0 0625 of the span 10 pA 2 BARD 830 Connect a 24 V DC power supply to the power supply terminals and a load resistor of 400 to the output terminals Vary the input signal level from 0 to 25 50 75 and 100 of the span and check that the error in the output level is always within 0 0625 of the span 10 pA 6 6 Replacement Procedure To replace a BARD barrier disconnect the wiring for the BARD or detach terminal blocks for a BARD 820 or 830 remove the BARD from the bracket or DIN rail and mount the new one Revision Record Edition Date 1st July 2002 Description New Publication 2nd March 2005 Correct errors in Terminal Assignments T13 EPS IM 01B04S10 01E 2nd Edition March 25 2005
3. C and check that the difference in resistance between terminals 1 A and 3 C is not greater than 60 mQ 3 BARD 810 Measure the resistances between terminals 1 and A with the measuring current at 20 mA DC or less and check that it is within 305 6 Q All Rights Reserved Copyright 2002 Yokogawa Electric Corporation 6 3 Test of Internal Voltage Drop for BARD 800 810 1 BARD 800 As shown in the diagram below connect a 24 V DC power supply to terminals 1 2 and a 23 6 mA constant DC current generator to terminals B A Measure the voltages between terminals 1 and A and between B and 2 and check that the sum is within the correct range from 3 5 to 4 16 V DC oO p O B 20 24V oc 30 F10 EPS 2 BARD 810 Connect a 23 6 mA constant DC current generator to terminals C 3 measure the voltage between terminals C and 3 and check that it is within the correct range from 1 to 1 75 V DC 6 4 Test of Short circuit Current for BARD 800 Connect a 24 V DC power supply to terminals 1 2 and a load resistor of 100 Q or less to terminals A B and check that the current flowing through the load resistance is within the correct range from 25 to 29 2 mA DC 6 5 Test of Input output Characteristics for BARD 820 830 1 BARD 820 Connect a 26 V DC power supply to the power supply terminals and a load resistor of 250 to the output terminals Vary the input signal level from 0 to 25 50 75
4. 1 apply a 20 mA DC current to each specified pair of power supply terminals from a constant DC current generator in turn and check that the voltage between the corresponding terminals meets the criterion from 5 to 10 V DC G in the table indicates the ground terminal Table 6 1 Points of Testing and Criterion Applied Power Supply No load Voltage No Connection Connection Terminals Current Terminals Voltage 1 1 G A G 2 G 1 G A s SE G 5to10V 4 G 2 G B DC 5 1 2 A B 6 2 1 B A T09 EPS All Rights Reserved Copyright 2002 Yokogawa Electric Corporation 5 to 95 RH no condensation T08 EPS 2 BARD 700 In accordance with Table 6 2 apply a 40 mA DC current to each specified pair of power supply terminals from a constant DC current generator in turn and check that the voltage between the corresponding terminals meets the criterion from 2 to 7 2 V DC G in the table indicates the ground terminal Table 6 2 Points of Testing and Criterion Applied Power Supply No load Voltage N Connection Connection o f Terminals Current Terminals Voltage 1 1 G A G 2 G 1 G A 3 2 G B G 40 mA DC 2to7 2V 4 G 2 G B DC 5 3 G Cc G 6 G 3 G C T10 EPS IM 01B04S10 01E 2nd Edition March 25 2005 10 3 BARD 800 In accordance with Table 6 3 apply a 20 mA DC cur
5. For inquiry for repair contact the vendor from which you purchased the product or your nearest sales representative Whether a faulty product can be fixed under warranty is determined by an investigation at Yokogawa main factory The warranty does not apply to the following even during the contracted warranty period A fault attributable to improper or careless handling by the customer A fault attributable to handling or use under conditions incompliant with Yokogawa specified installation criteria and specification requirements A fault and or damage caused by a natural disaster or fire or not caused by the product itself 2 Model and Suffix Codes Model Suffix Codes Description BARD Safety barrier 2 For use with a thermocouple gi aaa For use with an RTD 1 Use es For use with a 4 to 20 mA signal 2 SQ eee Power supply set 3 00 4455 Zener barrier Zener barrier for a CS multiplexer module Isolated barrier for a transmitter with communication functions Type Isolated barrier for a control element With one power feed unit on a DIN rail With dual redundant power feed units on a DIN rail Style code A Style A T01 EPS 1 Available only with type code 00 2 Available with type code 00 10 20 or 30 3 Available with type code 40 or 50 3 Intrinsic Safety Specifications and Precautions 3 1 BARD 600 Intrinsic Safety Specifica
6. the tip of a flat blade screwdriver with a 4 to 5 mm wide tip between the red stopper at the rear of the intrinsically safe terminals and the barrier Draw out the stopper by approximately 5 mm In the same way draw out the stopper on the other side 2 Pull to remove the barrier in a direction perpendicular to the bracket or DIN rail 4 2 Wiring The following precautions should be stringently observed for the wiring of intrinsic safety devices to prevent the system s intrinsic safety from being compromised by an effect of electric or magnetic energy from other electric devices and wiring 4 2 1 Precautions for Wiring 1 Separate intrinsically safe circuit wiring from the other wiring to avoid a short 2 Secure a sufficient distance between the runs of the intrinsically safe circuit wires and those of other wires or use shielded cables for the intrinsically safe circuit wiring in order to prevent electrostatic or electromagnetic induction by other wires 3 For intrinsically safe circuit wiring use wires with a light blue covering of insulation or wrap light blue tape around the outside of both ends of each wire so that the wires can be clearly distinguished from non intrinsically safe circuit wires For the BARD 820 and 830 use light blue terminal blocks on the side of the intrinsically safe circuit 4 2 2 Recommended Wires Cables and Terminal Lugs For wiring between an intrinsic safety device and a BARD barrier it
7. them straight down onto the barrier BARD 600 BARD 700 BARD 800 BARD 810 Grounding terminal M4 screw Intrinsically safe terminals 4 M4 screws 115 4 53 Nonhazardous f terminals lt M4 screws C Grounding terminal eA Y M4 screw NL A CAUTION Whenever you attach terminal blocks for nonhazardous terminals follow the order below When detaching follow the reverse order 1 Attaching terminal blocks 1 and 2 2 Attaching terminal blocks 3 and 4 Whenever detaching or attaching a terminal block ensure that all the attached terminals are fixed securely Unit mm approximate inches gt 10 1 0 397 Bracket gt EA i 125 5 4 94 12 75 0 502 gt 139 5 47 gt 0 492 lt 12 5 lt CuI J dat BARD 820 BARD 830 A Intrinsically safe terminals Kk two M4 screw terminals B Green LED for BARD830 only P 000 Glows when the power is smal Red LED for BARD830 only pa Glows when there is a as breakage in output 000 138 5 43 Nonhazardous terminals four M4 screw terminals in two rows A j j N Detachable terminal block 79 3 11 Bracket 117 4 61 132 5 20 mL a
8. Model BARD Safety Barriers User s Manual 1 Preface Thank you for purchasing our products This User s Manual explains the handling and safety precautions for use of the BARD 600 700 800 81 0 820 830 Before using them read this manual thoroughly to ensure correct and safe use Checking Items in the Package After opening the package 1 Check that the appearance is not defective 2 Check the model code printed on the side of each product and confirm that any one of the delivered products is not a wrong model 3 Check that the standard accessory a bracket for each product is included Handling of This Manual Please hand over this manual to your end users No part of this manual may be transferred or reproduced without prior written consent from Yokogawa Electric Corporation The contents of this manual are subject to change without prior notice Safety Protection and Modification of the Product In order to protect the system controlled by the products and the products themselves and ensure safe operation observe the safety precautions described in this manual Yokogawa assumes no liability for safety if users fail to observe these instructions when handling a product A BARD composes an intrinsically safe system modification to it including a change to a circuit constant is strictly prohibited Disclaimer of Warranty The warranty period for each product depends on the contract at purchase
9. but PR and PR feed from the power rail are used in place 2 IS barriers must be installed in a nonhazardous safe area 3 The IS device connected to an IS barrier must have obtained type certification solely not as a particular combination and meet the following criteria 1 Intrinsic safety ratings Maximum allowable IS circuit voltage Ui 25 2 V DC Maximum allowable IS circuit current li 93 mA Maximum allowable IS circuit power Pi 0 58 mW 2 Protection concepts and gas group Protection concepts ia ib Gas group IIA IIB IIC 3 Entity relationships between internal inductance capacitance and external IS circuit wiring inductance capacitance Lw and Cw Internal inductance 4 2 mH LW Internal capacitance 0 107 pF CW 4 The generic receiver instrument connected to an IS barrier must ensure that its input power supply voltage and internal circuit voltages do not exceed 250 V AC 50 or 60 Hz or 250 V DC under normal or abnormal conditions All Rights Reserved Copyright 2002 Yokogawa Electric Corporation IM 01B04S10 01E 2nd Edition March 25 2005 4 Installation and Wiring 4 1 Mounting and Removal A BARD barrier should be installed inside an indoor rack or onto a panel wall and mounted directly onto a standard 35 mm wide DIN rail DIN EN 50022 or onto a panel wall or DIN rail with the accompanying bracket A CAUTION No effort is required for mounting and removal if you follow th
10. c safety ratings circuit voltage Vm circuit current Im circuit power Pm 1 Intrinsic safety ratings Maximum allowable IS circuit voltage Ui 10VDC Maximum allowable IS circuit current li 100 mA Maximum allowable IS circuit power Pi 0 25 W Maximum allowable IS 10VDC Maximum allowable IS 100mA Maximum allowable IS 0 25 W 2 Explosion class and 2 Entity relationships between internal inductance capacitance and external IS circuit wiring inductance capacitance Lw and Cw Internal inductance 2 2 mH Lw Internal capacitance 1 0 pF Cw Protection concepts and gas group Protection concepts ia ib Gas group IIA IIB IIC ignition temperature of applicable gases Explosion class 1 2 3a Ignition temperature G1 to G5 T03 EPS 5 The generic receiver instrument connected to an IS barrier must ensure that its input power supply voltage and internal circuit voltages do not exceed 250 V AC 50 or 60 Hz or 250 V DC under normal or abnormal conditions The BARD 600 is supplied as a substitute for the following model certified for protection concepts and apparatus group Model BARD 200 barrier Certificate No 28121 Technology Institution of Industrial Safety Japan for protection concepts and apparatus group All Rights Reserved Copyright 2002 Yokogawa Electric Corporation 3 2 BARD 700 Intrinsic Safety Specifications Explosion prot
11. e correct procedures Make sure you do not apply excess force as doing so may damage or break the product or bracket 4 1 1 BARD 600 700 800 or 810 Mounting An attachment which can be found at the rear of the barrier as shown in the figure below is designed to clamp between B and C the tabs of a 35 mm wide DIN rail or the fitting of the accompanying bracket Use a DIN rail made of approximately 1 2 mm thick iron plate aluminum not allowed 1 Hook the pointed part C of the attachment on one side of the front fitting of the accompanying bracket or on a tab of the DIN rail 2 Push in the barrier on the round part B of the attachment until you feel it click into place i Oo oO A gt F08 eps Removal 1 Insert the tip of a flat blade screwdriver with a 4 to 5 mm wide tip from the side into the rear of the barrier near screw A you will be able to see a screwdriver symbol 2 Tilt the screwdriver to the side of the barrier and the rear attachment will slide and the round part B should be released from the bracket or DIN rail Pull to remove the barrier All Rights Reserved Copyright 2002 Yokogawa Electric Corporation 4 1 2 BARD 820 or 830 Mounting Bring the barrier near the bracket or DIN rail and while keeping the barrier perpendicular to the bracket or DIN rail push the barrier until you feel it click into place Removal 1 Insert
12. ected Construction Grade Protection Concepts and Apparatus Gas Group Grade i3aG5 Concepts and group Ex ia IIC Working temperature range 10 to 50 C Working temperature range 10 to 50 C Ratings Terminals A B C to grounding terminal Vmax 7 2 V Icc 174 mA Pmax 0 3132 W Terminals A B to C B C to A and C A to B Vmax 14 4 V Icc 77 mA Pmax 0 2772 W Cext 0 37 pF Lext 0 5 mH Vm 250 V AC 50 60 Hz or 250 V DC Ratings Terminals A B C to grounding terminal Uo 7 2 V lo 174mA Po 0 3132 W Terminals A B to C B C to A and C A to B Uo 14 4 V lo 77mA Po 0 2772 W Co 0 37 pF Lo 0 5 mH Um 250 V AC 50 60 Hz or 250 V DC Precautions T04 EPS 1 A BARD 700 intrinsic safety IS barrier must be used in such a configuration as shown below Hazardous area area Intrinsically safe gt Nonhazardous resistance Generic temperature receiver Power detector BARD 700 barrier instrument ees ily ee ee supply A p A 1 o l B B 2 l c OH 0 3 TES zi IY Grounding 10 Q or less equivalent to JIS Class A F02 eps 2 IS barriers must be installed in a nonhazardous safe area 3 IS barriers must be grounded independently to the high integrity ground point at a grounding resistance of 10 Q or less equivalent to Japanese Industrial Standard Class A The IS device connected t
13. following criteria 1 Intrinsic safety ratings Maximum allowable IS circuit voltage Ui 25 2 V DC Maximum allowable IS circuit current li 93 mA Maximum allowable IS circuit power Pi 0 58 mW 2 Protection concepts and gas group Protection concepts ia ib Gas group IIA IIB IIC 3 Entity relationships between internal inductance capacitance and external IS circuit wiring inductance capacitance Lw and Cw Internal inductance 4 2 mH Lw Internal capacitance 0 107 pF Cw 4 The generic receiver instrument connected to an IS barrier must ensure that its input power supply voltage and internal circuit voltages do not exceed 250 V AC 50 or 60 Hz or 250 V DC under normal or abnormal conditions 3 6 BARD 830 Intrinsic Safety Specifications Protection concepts and apparatus gas group Ex ia IIC Working temperature range 10 to 50 C Ratings Uo 25 2 V DC lo 93 mA Po 0 58 W Co 0 107 uF Lo 4 2 mH Um 250 V AC 50 60 Hz or 250 V DC Precautions 1 A BARD 820 intrinsic safety IS barrier must be used in either of the configurations shown below Hazardous Nonhazardous gt Da se Generic Intrinsic safety BARD 830 receiver Power device ____ barrier instrument _ supply O OA 1 al o oB 2 ji E PR PR 4 F07 eps When using BARD 940 or 950 to supply power to the IS device through the BARD 820 terminals 3 and 4 are not used
14. is recommended to use one of the following cables containing a twisted pair s of cores with a cross sectional area of 0 5 mm or larger maximum applicable wire size is 2 5 mm and with a twist pitch of 150 mm or less for prevention of induction Clamp a ring tongue terminal lug for M4 terminal at both ends of each wire 1 Polyethylene insulated vinyl sheath cable JIS C3604 2 Vinyl insulated vinyl sheath cable for control JIS C3401 3 Cable for low voltage instrumentation Japanese Cable Makers Association Standard JCS 364 4 Thermocouple extension wires for BARD 600 JCS 365 5 For grounding use a 12 AWG insulated wire 4 mm or thicker 6 Examples of recommended terminal lugs Models TMEV 1 25 4 and TMEV 2 4 from Nichifu Co Ltd Japan IM 01B04S10 01E 2nd Edition March 25 2005 4 2 3 Wiring Methods Perform wiring for a BARD barrier in accordance with the terminal arrangements shown in Figure 4 1 For connections to the receiver instrument and intrinsic safety device follow the instructions in the respective documentation When BARD 600 700 800 and 810 barriers are mounted directly onto a DIN rail without use of brackets grounding the DIN rail will ground all of them The terminal blocks on the BARD 820 and 830 are detachable You can conveniently detach them to perform wiring and then reattach them When detaching them pull them straight up off the barrier When reattaching them push
15. istance 0to1kO Signal range 4 to 20 mA DC 4 to 20 mA DC Overrange 0 to 24 mA DC 0 to 22 mA DC Intrinsically safe signal Load resistance 0 to 750 Q at 0 to 20 mA DC 0 to 700 at 0 to 21 6 mA DC Output signal ripples 50 pA rms Output resistance 6 MQ or larger Input output accuracy at 23 C 0 0625 of span 10 pA Effect of temperature variations 25 ppm C 0 4 pA C Response 10 ps 10 to 90 100 ps 10 to 90 Power supply voltage Max 16 4 V DC at 20 mA Min 16 1 V DC at 24 mA Input voltage drop 2 V or less at 20 mA Applicable communication type Yokogawa BRAIN communication Output breakage detection 19 V or larger Working power supply voltage 20 to 35 V DC 7 mA at 20 V D Maximum power consumption at 20 mA DC output ste 20V DO Somate c 78 mA at 24 V DC 57 mA at 24 V DC 250 Q load 56 mA at 35 V DC 46 mA at 35 V DC Input to output 1 500 V AC for 1 minute 1 500 V AC for 1 minute Withstanding voltage Input to power supply 1 500 V AC for 1 minute 40 V DC for 1 minute Output to power supply 40 V DC for 1 minute 1 500 V AC for 1 minute Working temperature range 10 to 50 C Storage temperature range 40 to 90 C Humidity range 6 Maintenance and Inspection 6 1 Test of No load Voltage of Intrinsically Safe Terminals for BARD 600 700 800 810 1 BARD 600 In accordance with Table 6
16. nductance capacitance and external IS circuit wiring inductance capacitance Lw and Cw Internal inductance 0 5 mH Lw Internal capacitance 0 37 uF Cw TOS EPS 5 The generic receiver instrument connected to an IS barrier must ensure that its input power supply voltage and internal circuit voltages do not exceed 250 V AC 50 or 60 Hz or 250 V DC under normal or abnormal conditions 6 The BARD 700 is supplied as a substitute for the following model certified for protection concepts and apparatus group Model BARD 300 barrier Certificate No 28122 Technology Institution of Industrial Safety Japan for protection concepts and apparatus group All Rights Reserved Copyright 2002 Yokogawa Electric Corporation 3 3 BARD 800 Intrinsic Safety Specifications Explosion protected construction grade i3aG5 Working temperature range 10 to 50 C Ratings Vmax 31 5 V Icc 29 2 mA Pmax 0 92 W Cext 42 nF Lext 4 2 mH Vu 250 V AC 50 60 Hz or 250 V DC Precautions 1 A BARD 800 intrinsic safety IS barrier must be used in such a configuration as shown below Hazardous Nonhazardous area area POR i Generic Intrinsic safety BARD 800 receiver Power device barrier instrument supply i A 1 l B 2 i l I 3 a te Lom Grounding 10 Q or less equivalent to JIS Class A FO3 eps 2 IS barriers must be installed in a nonhazardous safe area 3 IS barrier
17. o an IS barrier a resistance temperature detector for a BARD 700 must have obtained type certification solely not as a particular combination and meet the following criteria IM 01B04S10 01E 2nd Edition March 25 2005 Explosion protected Construction Grade Protection Concepts and Apparatus Group 1 Intrinsic safety ratings Terminals A B C to grounding terminal Maximum allowable IS circuit voltage Vm 7 2VDC Maximum allowable IS circuit current Im 174mA Maximum allowable IS circuit power Pm 0 3132 W Terminals A B to C B C to A and C A to B Maximum allowable IS circuit voltage Vm 14 4V DC Maximum allowable IS circuit current Im 77mA Maximum allowable IS circuit power Pm 0 2772 W 1 Intrinsic safety ratings Terminals A B C to grounding terminal Maximum allowable IS circuit voltage Ui 7 2VDC Maximum allowable IS circuit current li 174mA Maximum allowable IS circuit power Pi 0 3132 W Terminals A B to C B C to A and C A to B Maximum allowable IS circuit voltage Ui 14 4V DC Maximum allowable IS circuit current li 77mA Maximum allowable IS circuit power Pi 0 2772 W 2 Explosion class and ignition temperature of applicable gases Explosion class 1 2 3a Ignition temperature G1 to G5 2 Protection concepts and gas group Protection concepts ia ib Gas group IIA IIB IIC 3 Entity relationships between internal i
18. pacitance and external IS circuit wiring inductance capacitance Lw and Cw Internal inductance 4 1 mH Lw Internal capacitance 89 nF Cw 5 The generic receiver instrument connected to an IS barrier must ensure that its input power supply voltage and internal circuit voltages do not exceed 250 V AC 50 or 60 Hz or 250 V DC under normal or abnormal conditions IM 01B04S10 01E 2nd Edition March 25 2005 3 5 BARD 820 Intrinsic Safety Specifications Protection concepts and apparatus gas group Ex ia IIC Working temperature range 10 to 50 C Ratings Uo 25 2 V DC lo 93 mA Po 0 58 W Co 0 107 pF Lo 4 2 mH Um 250 V AC 50 60 Hz or 250 V DC Precautions 1 A BARD 820 intrinsic safety IS barrier must be used in such a configuration as shown below Hazardous Nonhazardous gt S i ve Generic Intrinsic safet BARD 820 receiver davies nS barrier instrument Se v pace eee O OA 1 TT O Signal 1 OB a l i 830 10 Power i l L spy PR 46 tio supply F06 eps When using BARD 940 or 950 to supply power to the IS device through the BARD 820 terminals 3 and 4 are not used but PR and PR feed from the power rail are used in place 2 IS barriers must be installed in a nonhazardous safe area 3 The IS device connected to an IS barrier must have obtained type certification solely not as a particular combination and meet the
19. r of the configurations shown below A Connecting IS Device to Terminals A and B Hazardous Nonhazardous area 4 area i Generic Intrinsic safety BARD 810 receiver Power device barrier instrument supply A 1 t B 2 gt C 3 a ger Grounding 1 0Qor less equivalent to JIS Class A F04 eps B Connecting IS Device to Terminals A and C Hazardous Nonhazardous area gt area f BARD 810 EAR ntrinsic safet z receiver device Y 3 barrier instrument kowe i zee a oe ee ee pply 5 A 1 lt i i B 2 l is l O OC 3 2 ie J E Grounding 10 Q or less equivalent to JIS Class A F05 eps All Rights Reserved Copyright 2002 Yokogawa Electric Corporation 2 IS barriers must be installed in a nonhazardous safe area 3 IS barriers must be grounded independently to the high integrity ground point at the grounding resistance of 10 or less equivalent to Japanese Industrial Standard Class A 4 The IS device connected to an IS barrier must have obtained type certification solely not as a particular combination and meet the following criteria 1 Intrinsic safety ratings Maximum allowable S circuit voltage Ui 27 1V DC Maximum allowable IS circuit current li 93 mA Maximum allowable IS circuit power Pi 631 mW 2 Protection concepts and gas group Protection concepts ia ib Gas group IIA IIB IIC 3 Entity relationships between internal inductance ca
20. rent to each specified pair of power supply terminals from a constant DC current generator in turn and check that the voltage between the corresponding terminals meets the corresponding criterion Table 6 3 Points of Testing and Criterion Applied Power Supply No load Voltage No Connection Connection Terminals Current Terminals Voltage 25 to 31 5 V 1 1 3 A C DC 20 mA DC 11to17V 2 B Cc 2 3 DC T11 EPS 4 BARD 810 In accordance with Table 6 4 apply a 20 mA DC current to each specified pair of power supply terminals from a constant DC current generator in turn and check that the voltage between the corresponding terminals meets the criterion from 20 to 27 1 V DC Table 6 4 Points of Testing and Criterion Applied Power Supply No load Voltage No Connection Connection i Terminals Current Terminals Voltage 1 1 2 A B 20 mA DC 20 to 27 1 V 2 C B 3 2 DC T12 EPS 6 2 Test of Internal Resistance for BARD 600 700 810 1 BARD 600 Measure the resistances between terminals 1 and A and between 2 and B with the measuring current at 20 mA DC or less and check that both are within 216 5 5 6 Q 2 BARD 700 Measure the resistances between terminals 1 and A and between 2 and B with the measuring current at 40 mA DC or less and check that both are within 130 3 Also measure the resistance between terminals 3 and
21. s must be grounded independently to the high integrity ground point at a grounding resistance of 10 or less equivalent to Japanese Industrial Standard Class A 4 The IS device connected to an IS barrier must have obtained type certification solely not as a particular combination and meet the following criteria 1 Intrinsic safety ratings Maximum allowable S circuit voltage Vm 31 5 V DC Maximum allowable S circuit current Im 29 2 mA Maximum allowable IS circuit power Pm 0 92 W 2 Explosion class and ignition temperature of applicable gases Explosion class 1 2 3a Ignition temperature G1 to G5 3 Entity relationships between internal inductance capacitance and external IS circuit wiring inductance capacitance Lw and Cw Internal inductance 4 2 mH Lw Internal capacitance 42 nF Cw 5 The generic receiver instrument connected to an IS barrier must ensure that its input power supply voltage and internal circuit voltages do not exceed 250 V AC 50 or 60 Hz or 250 V DC under normal or abnormal conditions IM 01B04S10 01E 2nd Edition March 25 2005 4 3 4 BARD 810 Intrinsic Safety Specifications Protection concepts and apparatus gas group Ex ia IIC Working temperature range 10 to 50 C Ratings Uo 27 1 V lo 93 mA Po 0 631 W Co 89 nF Lo 4 1 mH Um 250 V AC 50 60 Hz or 250 V DC Precautions 1 A BARD 810 intrinsic safety IS barrier must be used in eithe
22. the receiver instrument s internal 250 resistor 5 Specifications of Barriers Table 5 1 Zener Barriers between wires Internal voltage drop Max 30 ppm C 138 Q x lo 0 9 V 4 16 V at 23 6 mA Item BARD 600 BARD 700 BARD 800 BARD 810 Type Zener barrier Zener barrier Zener barrier Zener barrier Use 4 to 20 mA DC 4 to 20 mA DC Thermocouple RTD 4 to 20 mA DC signal r dae control signal monitoring signal Leakage current 10 pA at6 5V 1 pA at2 5V 10 pA at 28 V 10 pA at 25 5 V Per wire 216 5 5 6 0 130 3 0 Internal z f Difference 60 MOQ resistance 311 0 7 34 V at 23 6 mA 6 72 V at 21 6 mA 311 0 36 O lo 0 9 V 9 09 V at 23 6 mA 8 40 V at 21 6 mA Maximum impressed voltage 9V 6 5 V 31 0 V 26 6 V Rated current of internal fuse 50 mA 100 mA 50 mA 50 mA Working temperature range 10 to 50 C Storage temperature range 40 to 90 C Humidity range 5 to 95 RH no condensation All Rights Reserved Copyright 2002 Yokogawa Electric Corporation IM 01B04S10 01E 2nd T07 EPS Edition March 25 2005 Table 5 2 Isolated Barriers Item BARD 820 BARD 830 Type Isolated barrier Isolated barrier Use AIEO MA DG signal Tom Maneier with 4 to 20 mA DC signal to control element communication functions Signal range 4 to 20 mA DC 4 to 20 mA DC Nonhazardous signal Overrange 0 to 24 mA DC 0 to 22 mA DC Load res
23. tions Explosion protected Protection Concepts and Construction Grade Apparatus Gas Group Grade i3aG5 Concepts and group Ex ia IIC Working temperature range Working temperature range 10 to 50 C 10 to 50 C Ratings Ratings Vmax 10 V Uo 10 V Icc 100 mA lo 100 mA Pmax 0 25 W Po 0 25 W Cext 1 pF Co 1 pF Lext 2 2 mH Lo 2 2 mH Vm 250 V AC 50 60 Hz Um 250 V AC 50 60 Hz or 250 V DC or 250 V DC T02 EPS YOKOGAWA Yokogawa Electric Corporation IM 01B04S10 01E 2nd Edition March 25 2005 Precautions 1 A BARD 600 intrinsic safety IS barrier must be used in such a configuration as shown below Hazardous lt Nonhazardous area area Generic Intrinsically safe receiver thermocovple BARD 600 barrier instrument aay l l ee l E aE aeaa Q Grounding 10 Q or less equivalent to JIS Class A F01 eps 2 IS barriers must be installed in a nonhazardous 3 aa oS safe area IS barriers must be grounded independently to the high integrity ground point at a grounding resistance of 10 Q or less equivalent to Japanese Industrial Standard Class A The IS device connected to an IS barrier a thermocouple for a BARD 600 must have obtained type certification solely notas a particular combination and meet the following criteria Explosion protected Construction Grade Protection Concepts and Apparatus Group 1 Intrinsi
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