Related Manuals for Datcon DT920
Summary of Contents for Datcon DT920
- Page 1 DOC. N°:. DT920-62 eng DT920 Intrinsically Safe Tachometer User Manual Manufacturer: DATCON Ipari Elektronikai Kft. H-1148 Budapest, Fogarasi út 5. 27. ép. Phone: +36-1-460-1000, Fax.: 460-1001...
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Page 3: Table Of Contents
Contents 1. Function ........................4 ..........................4 2. Operating principle ....................4 ..........................4 3. Connecting the device....................5 ..........................5 4. Mounting of the device ....................6 ..........................6 5. Putting the device into operation ................6 ..........................6 5.1. Error signals........................7 5.2. Programming of the device....................7 5.3. -
Page 4: Function
1. Function The apparatus DT920 is a pulse-input tachometer, which can be installed in explosive areas classified as Zone 1. 2. Operating principle Contact signal transmitters, or any inductive proximity sensors in accordance with the standard DIN 19234 (NAMUR) can be connected to the input of the apparatus. The pulses, coming from the signal transmitter, arrive at a repeater output after galvanic isolation, providing opportunity for a processing independently from the device. -
Page 5: Connecting The Device
3. Connecting the device The DT920 tachometer can be operated by using an intrinsically safe power-supply unit. The apparatus is built in an IP-65-protected plastic box; the cable outlets are secured by stuffing boxes. The connecting of the device is presented by Figure 2. -
Page 6: Mounting Of The Device
4. Mounting of the device The device is installable in places classified as Zone 1 or lower. When the device is installed, the prescriptions on the installation of intrinsically safe devices must be observed. The apparatus is available in wall-mountable or in instrument panel installable versions. In the case of wall-mountable design the cables used for the electrical connecting of the device can be connected through the stuffing boxes on the bottom of the device. -
Page 7: Error Signals
5.1. Error signals Error signals during measurement: Error code: Meaning Power-supply voltage error (Us < 15 V) Short sensor (I > 6,5 mA) Broken sensor (I < 0,5 mA) Display overflow Too high input frequency Error in reading command code Processor program running error (watchdog) Processor clock-generator error The error signal, when parameters are registered:... -
Page 8: Limit-Value-Switching Outputs
Programmable parameters: Display Parameter name Minimum Maximum Number of teeth of the signal transmitter gear (divider) 9999 Number of teeth of the driven gear (multiplier) 9999 Number of teeth of the driving gear (divider) 9999 Place of the decimal point Analogue output scaling... -
Page 9: Analogue Output
5.4. Analogue output The analogue output is an option. In program mode the analogue output can be selected, but only physically installed outputs can be used, therefore always check the data table of the de- vice before connecting it, to see whether the given option has been actually installed. analogue (P5) = 2000 20mA... -
Page 10: Technical Specifications
Connection to intrinsically safe circuits: Ui ≤ 22,4 V, Ii ≤ 91 mA, Pi ≤ 2,1 W, Ci ≈ 0 F, Li ≤ 726 µH Recommended power supply unit: Datcon DT2500 18 070 (Only EEx ib IIC) NAMUR input DIN19234(NAMUR+[20]; NAMUR-[19]) Working resistance: 1 kΩ...