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RHEONIK RHE28, Installation & Start?Up Manual

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RHEONIK RHE28 Installation & Start?Up Manual Download Page 25

 

 

 

RHE28 Installation & Startup Guide – Doc. No. 8.2.1.07 – Ver. 1.31

 

25 / 43

 

 

5

 

Remote Operation 

 
RHE28  transmitters  are  provided  with  an  RS485  interface  for  digital  communication,  remote 
control and data exchange.  An optional HART interface is also available. 

5.1

 

RS485 

The RS485 port uses Modbus protocol for permanent connection to a supervisory control system. 

 

 

 

 

 

 

 

To  connect  using  Modbus  via  the  RS485  serial  port,  refer  to  the  RHE2X  Desktop  Reference 
Manual for a detailed description of the interface and register set. 

The RHE28 transmitter features an internal 120 Ω termination resistor with a switch close to the 
RS485 terminals. Normally, the termination switch (and the factory default position) should be 
set to ON. When more than one device is attached to the RS485 line this switch must be set to 
OFF for all devices on the line except for those devices at each end of the line, where the switch 
must be set to ON. 

 

5.2

 

HART 

The HART interface is an option offered with the RHE28 transmitter. 

Connect the analog output 1 as described in chapter 3.2.3.2 to a HART host input. A 250 Ω load 
resistor is recommended when connecting a HART modem. 

For a full description of the available HART register set, refer to the RHE2X HART manual. 

 

 

70 

71 

485B 

485A 

Figure 19: RS485 Interface Wiring

 

Summary of Contents for RHE28

Page 1: ...RHE28 Installation Startup Guide Doc No 8 2 1 07 Ver 1 31 1 43 RHE28 Installation Startup Guide Document No 8 2 1 07 Version 1 31 APR 2021 ...

Page 2: ...minals 8 3 2 1 4 Legacy RHM Sensors 9 Terminals 9 Power Supply and Grounding 11 3 2 2 1 Grounding 11 3 2 2 2 12V to 24V DC Power Supply 11 3 2 2 3 100V to 240V AC Power Supply 11 3 2 2 4 AC and DC Supply 12 Control Inputs and Outputs 12 3 2 3 1 Digital Outputs 12 3 2 3 2 Analog Outputs 13 3 2 3 3 Digital Inputs 14 3 2 3 4 Analog Input 15 4 Operation and Configuration 16 4 1 Function of the Pushbut...

Page 3: ...nstallation in a hazardous area 28 A 2 System Description 29 A 3 Electrical Safety Limits 29 A 4 Thermal Safety Limits 30 A 5 Grounding and Shielding 30 A 6 Installation 31 A 7 Electrical connection of power supply and I O 31 A 8 Electrical connection to RHE 32 A 9 Ordering Code 33 A 10 Technical Data 34 A 11 Compliance 34 A 12 Service and repair 35 A 13 Contact address 35 Appendix B Technical Inf...

Page 4: ...y for loss and or consequential damages stemming from the use of this product utilized in life preserving systems in the medical motor vehicle aircraft water craft or mining industries Rheonik accepts no liability for loss or damage resulting from the improper use of any of its products Rheonik assumes no liability for the loss of production and or consequential damage from the use of this product...

Page 5: ...he backlight will turn red 5 Flush the RHM flow sensor with process fluid and ensure that it is free of air bubbles in case of a liquid process fluid or liquid droplets in case of a gaseous process fluid 6 Wait until the RHM temperature has stabilized and then carry out a zero point calibration section 4 3 Ensure a zero flow condition is present in the flow sensor by closing isolation valves Initi...

Page 6: ... 1 Overview RHM electrical connection types RHM electrical connection type Junction box terminals Section JM SM aluminium stainless steel 11 3 2 1 1 TM PTFE cable with 9 wires shield 3 2 1 2 JO aluminium 12 3 2 1 3 legacy type aluminium stainless steel 9 3 2 1 4 3 2 1 1 RHM Electrical Connection Type JM SM 11 Terminals Table 2 RHE28 Wiring Plan for RHM Connection Types JM SM RHM Terminal Cable RHE...

Page 7: ...RHM Electrical Connection Type TM PTFE Cable Table 3 RHE28 Wiring Plan for RHM Connection Type TM 1 The shield of the cable is connected internally to the housing of the RHM If there is a risk of a significant potential difference between the housing of the RHM and the PE terminal of the RHE the shield should be connected to the RHE PE connection via a 1nF capacitor Alternatively a separate cable ...

Page 8: ...emperature Sensors GND 4 PtG 5 PT 1 2 Common 6 Pick Up left Yellow Pick Up Coil A high 6 PkAH 7 Pick Up left Green Pick Up Coil A low 7 PkAL 8 Pick Up right Grey Pick Up Coil B low 8 PkBL 9 Pick Up right White Pick Up Coil B high 9 PkBH 10 1 GND yel grn Shield 10 PE 11 PT2 Tor Supply Orange Temperature Sensor Torsion 5 PtT 12 PT2 Tor Sense 1 The shield of the cable is connected through terminal 10...

Page 9: ... 4 Pink Temperature Sensor Pipe Sense 4 PtG 5 Orange Temperature Sensors Common 5 PtT 6 Yellow Pick Up Coil A high 6 PkAH 7 Green Pick Up Coil A low 7 PkAL 8 Grey Pick Up Coil B low 8 PkBL 9 White Pick Up Coil B high 9 PkBH Screw Term 1 yel grn Shield 10 PE 1 The shield of the cable is connected to the housing of the RHM using a screw terminal in the junction box If there is a risk of a significan...

Page 10: ...if the RHE indicates an error and the temperature measurement on the bottom right of the display shows C F please check the temperature measurement configuration setting in the RHE section 4 5 The correct temperature measurement configuration setting for an RHM legacy sensor is 1 ...

Page 11: ...rew connection at the bottom center of the housing The cross sectional area of the grounding wire must be equal to or larger than the conductors used for any supply or I O connection Note National and Local electrical code requirements may contain additional grounding requirements Please ensure that all grounding to carried out to these legal requirements 3 2 2 2 12V to 24V DC Power Supply Units f...

Page 12: ... be used to power the RHE until the Voltage present drops below 10V An RHE RHM flow meter has a typical power consumption of around 3W If a 12V 100Ahr battery is used as the DC input to the RHE the unit would operate for more than 10 days after the AC supply had been disconnected Control Inputs and Outputs In general shielded cables should be used for cable connections longer than 0 5m For cable c...

Page 13: ...he positive supply rail the output can drive up to 100mA 2 4W at 24V The output can drive relays directly as well Relays should be connected between the output and the positive supply rail 3 2 3 2 Analog Outputs An RHE28 transmitter can be supplied with up to two 4 20 mA analog outputs The outputs can be connected in a passive floating configuration or as active outputs for ground referenced loads...

Page 14: ...n series with the transmitter output and the load Please note with a 24Vdc supply the maximum total load resistance is 600 Ω For analog outputs with HART communication a load resistance of 250 Ω is recommended 3 2 3 3 Digital Inputs RHE28 transmitters can be equipped with up to two IEC60946 compliant digital inputs NOTE Unless advised in advance of delivery all digital inputs are configured by def...

Page 15: ...or with a passive 4 20 mA output The RHE28 transmitter provides power to the connected devices output The 4 20mA analog input is connected to terminal 60 positive and terminal 61 negative It is highly recommended that shielded cable be used and that the shield is connected to terminal 68 PE at the transmitter The analog input in RHE28 transmitters certified for use with an RHM in a hazardous area ...

Page 16: ...r input field and returns to the associated menu window without saving any changes NEXT Menu Navigation Selects the next menu item During Number Input Increments the number at the cursor position by one Number increment is circular a 9 increments to 0 for decimal numbers F increments to 0 for hexadecimal numbers used for service password Number Sign Change Changes to and vice versa When entering a...

Page 17: ...2 Passcodes and Menu Selection To configure and carry out certain functions in an RHE28 transmitter it is necessary to enter a predetermined passcode Passcodes protect configuration setup and prevent inadvertent changes to the flow meter operating condition There are two different access levels with separate passcodes USER and SERVICE The USER level accesses those functions that relate to the oper...

Page 18: ...rt the procedure or ESC to cancel Once started a countdown timer will begin When it reaches 0 the zero offset calibration procedure is complete Return back to the main screen by pressing the EXIT pushbutton twice 4 4 Change of Positive Flow Direction Rheonik mass flow meters are bi directional and can operate with flow passing through them in any direction In some cases after installation the tran...

Page 19: ...operly configured in all RHE2X transmitters For new RHE RHM systems the temperature measurement type will have already been configured at the factory Checking that the setting is correct or to change the setting so the transmitter can be used with a different RHM flow meter body requires accessing the temperature measurement configuration menu item as shown in Figure 16 Figure 16 RHE28 Menu Temper...

Page 20: ...ER to get to the Configuration C B01 menu 2 Select one of the options stated in Table 8 under ID C B01 e g Configuration 3 Density 3 The default settings are Maximum mA C B02 20mA Minimum mA C B03 4mA This can be changed if necessary 4 Assign the maximum and minimum of the measured variable to respective mA level e g 1200 kg m for Density Max C B08 and 0 kg m for Density Min C B09 5 Select a fire ...

Page 21: ... exceeded State 5 3 6 mA range exceeded State 6 22 mA error condition State 9 3 2 mA error condition State 10 3 6 mA error condition C B17 CurOutDampingTau Current Output Damping Tau Time constant Tau of the current output damping in seconds An exponential damping mechanism is used within a defined band see CurOutDampingBand When the output values leave the defined band the damping is disabled A v...

Page 22: ...ant pulse and digital output parameters ID Abbreviation Full Name Description R S01 VersDigOutCh0 1Config Versatile Digital Output Configuration Used to assign different functions to the pulse output In simple pulse mode Pulse1 and Pulse2 operate independently In phase shift mode Pulse1 and Pulse2 work together to produce the desired pulse output relationship In phase shift mode both outputs Pulse...

Page 23: ...larm Channel Digital Alarm Type 0 Setpoint alarm hysteresis default Alarm is indicated when the output is higher than DigOutCh0AlmHigh and cleared when it returns below DigOutCh0AlmLow 1 Inband alarm Alarm is indicated when the output is in the range from DigOutCh0AlmLow to DigOutCh0AlmHigh 2 Outband alarm Alarm is indicated when the output is outside the range DigOutCh0AlmLow and DigOutCh0AlmHigh...

Page 24: ... Zeroing Process Logic is negative a transition to a low logic level starts the Zeroing 3 DI1 2 causes reset of the Totalizers and the start of Batch Processing if configured see RHE2X Desktop Reference Batch Mode Logic is positive a transition to a high logic level starts the Batch 4 DI1 2 causes reset of the Totalizers and the start of Batch Processing if configured see RHE2X Desktop Reference B...

Page 25: ...res an internal 120 Ω termination resistor with a switch close to the RS485 terminals Normally the termination switch and the factory default position should be set to ON When more than one device is attached to the RS485 line this switch must be set to OFF for all devices on the line except for those devices at each end of the line where the switch must be set to ON 5 2 HART The HART interface is...

Page 26: ... to point 6 of section 2 and section 4 3 are recommended to ensure a consistent measurement accuracy within the allowed deviations Density measurement in a RHE2X transmitter can be calibrated in the field Please refer to the relevant section in the RHE2X Desktop Reference for instructions 6 2 Troubleshooting Each status window shows a code e g 0x00000000 By pressing the ENTER button the cursor wal...

Page 27: ...RHE28 Installation Startup Guide Doc No 8 2 1 07 Ver 1 31 27 43 7 Ordering Code ...

Page 28: ...t exceed 100 meters The connection cable ARHE C4 is specified for 50 C to 105 C Temperatures above must be avoided Temporary temperatures below 50 C are allowed if the cable is fed in a protecting tube Always close unused cable glands and openings with dummy plugs When installed in zone 2 or div 2 the RHE28 must not be opened with any power connection alive THE USB interface must not be used in ha...

Page 29: ...B zone 2 safe area ATEX IECEx AS safe area ATEX IECEx C2 zone 2 div 2 safe area group IIC CSA for USA and Canada CB zone 2 div 2 safe area group IIB CSA for USA and Canada CS safe area CSA for USA and Canada A 3 Electrical Safety Limits Power supply and I O Signal Terminals Type Nominal Voltage Maximum Voltage Um Code AS CS Um Code A2 AB C2 CB AC supply 23 24 Supply 90 250V AC 250V 250V 250V DC su...

Page 30: ...65 4 0 100 A 4 Thermal Safety Limits The RHE28 with Ex code A2 AB C2 or CB have the temperature class T4 The RHE28 with Ex code AS or Cs must be installed in the safe area therefor no temperature class is specified for these units The ambient temperature must under no circumstances exceed the limits specified in chapter A 10 A 5 Grounding and Shielding The RHE28 must be grounded The minimum cross ...

Page 31: ...NPT are available When installed in zone 2 or div 2 only certified cable glands must be used Special conditions for CSA certified units RHE28 marked Class I Div 2 Group A B C D and or Class I Zone 2 A Ex db ia Ga IIC T4 Gb 1 Shall be installed in class I Division 2 Zone 2 location 2 Potential equalization shall be provided along intrinsically safe circuits grounding RHE28 marked Ex ia Ga 1 Shall b...

Page 32: ...ical connections between RHM S or J connection box and a RHE28 For further information regarding the connections the function of the different signals and special connections for RHM with fixed cable please refer to chapter 4 Electrical Installation and to appendix A Ex safety instructions of the RHM manual For the connection to the cage clamp terminals in the RHE28 the following rules apply Condu...

Page 33: ...4 Gc As A2 but for gas group IIB AS II 1 G Ex ia Ga IIC RHE28 in safe area CSA USA and Canada C2 class I Div 2 Ex nA ia Ga IIC T4 Gc RHE28 in zone 2 Div 2 CB class I Div 2 Ex nA ia Ga IIB T4 Gc As C2 but for gas group IIB CS Ex ia Ga IIC RHE28 in safe area CC Measurement Certifications OOO Special Options Not all combinations are possible For available combinations see instructions Where no versio...

Page 34: ...h the following standards for hazardous areas IEC 60079 0 IEC 60079 15 IEC 60079 11 For the list of standards relevant for a certain unit and for the release date refer to the certificate The RHE21 certified by CSA comply with the following standards for hazardous areas C22 2 No 61010 1 2012 UL 61010 1 3rd Ed C22 2 No 30 M1986 R2012 UL 1203 5th Ed 2013 C22 2 No 60079 0 6th Ed UL 60079 0 6th Ed C22...

Page 35: ...viceable parts and must not be opened by the user If the unit gets opened the Ex certification gets void In case of malfunction connect your dealer or directly Rheonik Messtechnik GmbH A 13 Contact address Rheonik Messtechnik GmbH Rudolf Diesel Str 5 85235 Odelzhausen Germany www rheonik com info rheonik com ...

Page 36: ...rning or error Operation 3 x capacitive buttons for all menu navigation and settings Power Supply AC 100 240 VAC 48 to 62 Hz 6W DC 12 24 VDC 10 6W Connection Internal cage clamp terminals Cable entries 2 cable glands 7 11mm 2 closed threads M25 X 1 5 Interfaces Modbus RTU RS485 standard HART over analog output option USB upon request Analog Outputs Type 4 20mA compliant to NAMUR NE 43 Signal type ...

Page 37: ... I O configuration Output value programmable Digital Inputs Type 24V according to IEC60946 Input Level 13V for high state 6V for low state Input Current 1mA Quantity 1 or 2 depending on I O configuration Input value programmable Analog Input Type 4 20mA active compliant to NAMUR NE 43 For 2 wire passive sensor Quantity 0 or 1 depending on I O configuration Input value Pressure uncertainty 0 1 of r...

Page 38: ...Appendix B Technical Information Ver 1 00 38 43 B 2 Mechanical drawing RHE28 Transmitter Dimensions all dimensions in mm ...

Page 39: ...Appendix C CE Certificates 39 43 Appendix C CE Certificates ...

Page 40: ...Appendix C CE Certificates 40 43 ...

Page 41: ...Appendix C CE Certificates 41 43 ...

Page 42: ...Appendix C CE Certificates 42 43 ...

Page 43: ...Document No 8 2 1 07 Version 1 31 APR 2021 ...

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