df53 / df98
Contents
1. connected The following figure shows a DF53 DF98 layout PROTECTION CONTRGL OUTPUT CONTROL LEB TERMINATOR INPUT IMPEDANCE PROTECTION N OLT Figure 2 DF53 DF98 block diagram DF53 DF98 User s Manual DF53 Eight terminals 3A to 10A implementing four independent Fieldbus ports four DIP switches for activating the bus termination one green LED for power status and four red LEDs indicating overcurrent DF53 FC It has the same characteristics of DF53 and meets the requirements for hardware tests of OIML R117 1 Flow Measurement System of Liquids DF98 Four terminals 3A 4A and 9A 10A implementing two independent Fieldbus ports two DIP switches for activating the bus termination one green LED for power status and two red LEDs indicating overcurrent N 24VDC 25 ouT1 _ Fieldbus OUT2 _ Fieldbus H1 OUT3 Fieldbus H1 OUT4 Fieldbus H1 ND I High Current Power Supply Impedance for Fieldbus 8 T a B 9 1 4 23 5 6 DF98 High Current Power Supply Impedance for Fieldbus Power Supply Impedance for Fieldbus 4 ports Figure 3 Power supply impedance for fieldbus DF53 DF98 The DF49 model was discontinued The replacement by D2. parallel with two 100 Q 2 terminators it results in a 50 Q line impedance approximately This impedance can be implemented in a passive mode 50 Q resistance in series with a 100 mH inductance or in an active mode through an impedance control circuit The fieldbus power supply impedance is a non isolated active impedance control device in compliance with IEC 61158 2 standard This device provides output impedance which in parallel with the two bus terminators a 100 Q resistor in series with 1 uF capacitor required by the standard results in a pure resistive line impedance for a broad frequency range The DF53 and DF98 cannot be used in intrinsic safety areas The figure shows the device block diagram The DF53 DF98 can be used in redundancy connecting its output and in parallel In this case use an external bus terminator BT302 to allow maintenances or replacing the DF53 DF98 in case of failure without interrupting the fieldbus communication Figure 1 System using the impedance DF53 The DF53 DF98 modules have LEDs to indicate power supply and overcurrent The input terminal block has two terminals 1A and 2A that are connected to the external 24 Vdc The power supply indication LED is green and it is energized while there is an external 24 Vdc power supply The overcurrent indication LED is red and it is energized only in case of an overcurrent caused by a short circuit in the plant or by an excessive number of devices
3. F53 or DF98 models should be evaluated according to the current limits The DF53 supports up to 340 mA per channel and DF98 supports 500 mA per channel Technical specifications 24 to 32 10 OUTPUT Current DF53 340 mA per channel DF98 500 mA per channel INPUT FILTER Attenuation 10dB in the input power ripple 60 Hz Maximum power dissipated DF53 2 26 W per channel DF98 3 43 W per channel DIMENSIONSAND WEIGHT gt O gt O O OS Dimensions WxHxD 39 9x137 0x141 5 mm 1 57x 5 39 x 5 57 in Weight without package 260 g DF53 DF98 User s Manual TEMPERATURE Operation 0 C to 60 C Storage 30 C to 70 C Output Overcurrent DF53 450 mA DF98 600 mA Input Fuse 25 Atmospheric Discharges Input and output protected by transient suppressors Intrinsic Safety It cannot be applied directly DF53 DF98 No redundancy 1 900 m Redundant 1 900 m DF53 FC No redundancy 1 900 m Redundant 1 000 m DF53 DF98 User s Manual Installation The DF53 DF98 is a device specially designed for panel installation and it cannot be installed in unsheltered locations as it cannot be exposed directly to the weather The module can be connected to the panel directly on the DIN rail or using the auxiliary support provided with the module fixed with screws Installing the module in the rack Follow the steps below
4. SS 8 823 L USER S MANUAL POWER SUPPLY IMPEDANCE FOR FIELDBUS DF53 DF98 I u x 2 gt S f a JAN 13 DF53 DF98 DF53 98ME smar www smar com Specifications and information are subject to change without notice Up to date address information is available on our website web www smar com contactus asp DF53 DF98 Power Supply Impedance for Fieldbus AVOIDING ELECTROSTATIC DISCHARGES ATTENTION Electrostatic discharges may damage semiconductor electronic components in the printed circuit boards They usually occur when touching components or connector pins from modules and racks without wearing the appropriate equipment to prevent discharges It is recommended to take the following precautions v Before handling modules and racks remove the electrostatic charge from your body by wearing a proper wristband or touching grounded devices v Avoid touching electronic components or connector pins from racks and modules DF53 DF98 User s Manual Description DF53 DF98 POWER SUPPLY IMPEDANCE FOR FIELDBUS These modules were specially designed to provide appropriate impedance for fieldbus networks DF53 4 ports DF53 FC 4 ports DF98 2 ports The purpose of this impedance is to implement an output circuit where the impedance is greater than 3 KQ and when assembling in
5. ercurrent circuit Such abnormal conditions may be easily detected by measurement instruments Because the DF53 DF98 is a simple and compact device it is recommended to replace faulty modules instead of electronic components during repair services Appendix SRF SERVICE REQUEST FORM r Proposal DFI302 Fieldbus Universal Bridge COMPANY INFORMATION Company Unit Invoice COMMERCIAL CONTACT Full Name Phone Fax E mail TECHNICAL CONTACT Full Name Phone Extension E mail EQUIPMENT DATA Model Serial Number PROCESS DATA Process Type Ex boiler control Operation Time Failure Date FAILURE DESCRIPTON Please describe the failure Can the error be reproduced Is it repetitive OBSERVATIONS 0 gt O Company Contact Section Title Signature Phone Extension E mail Date For warranty or non warranty repair please contact your representative Further information about address and contacts can be found on www smar com contactus asp A 1 DF53 DF98 User s Manual A 2
6. to install the module in the rack Attach the top of the module with a 45 inclination to the module support located on the upper part of the rack Mounting detail Push the module fixing it to the connector Next fix the module to the rack using a screwdriver and fasten the fixation screw at the bottom of the module 4 Installing the module using the auxiliary support Fix the supplied support directly on the panel with screws Attach the DF53 DF98 in the auxiliary support DF53 DF98 User s Manual 136 5 37 122 Dimensional drawing 4 78 5 41 Maintenance and troubleshooting The DF53 DF98 is a robust device which basically requires no preventive maintenance It is simply recommended to protect it from excessive dust accumulation and humid environments which might affect its output impedance The two modules have LEDs which inform their operation status one green LED which informs that the module is properly powered and one red LED for each channel that will be lit if any abnormal condition occurs in the field wiring These LEDs detect most of the problems which may occur in a Fieldbus installation However they might not detect other problems such as Excessive noise caused by the external power supply Impedance lower than 200 the communication line note that such impedance may not be pure resistive and therefore not detectable by the ov
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