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Summary of Contents for WOBIT WDT11
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Operation manual WDT11 Programmable amplifier for force sensors with 0-10V/4-20mA output, USB and RS485 MODBUS P.P.H. WObit E. J. Ober s.c. 62-045 Pniewy, Dęborzyce 16 tel. 61 22 27 422, fax. 61 22 27 439 e-mail: wobit@wobit.com.pl www.wobit.com.pl...
Avoid leading of control (signal) cables parallel or in close to power line cables. Avoid close vicinity of devices generating high level of electromagnetic and/or pulse interference (high power loads, loads with phase or group power regulation). WDT11 – operation manual - 11-09-2019 www.wobit.com.pl...
The WDT11 amplifier is designed for operation with load cells (4 or 6 wires without build-in electronics). It enables processing of sensor signals into current signal 4-20mA (or voltage signal 0-10 V) and digital (RS485). Build-in RS485 interface with MODBUS protocol allows direct communication one or several modules with PLC or HMI.
Fig. 1 The WDT11 connection possibilities. 2.2 Description of connectors and diodes Description Power supply Power supply 12 -24 VDC Power supply ground (GND) RS485 MODBUS-RTU Signal + Signal - Analog output, tara input Signal’s ground (incl. power supply) 0-10V/4-20mA...
Yellow Green Table. 1 Wires color description for sensors from WObit’s offer. CAUTION – it is possible that colors of signals may change. Tara input / tara button WDT1 is equipped with TARA input which tare measurement after giving voltage in range 5..24VDC (regarding to GND) during min 100 ms.
2.5 Analog output 4-20 mA/0-10 V WDT11 depend on version is equipped with current output (4-20mA) or voltage output 0-10 V which process force value into proper current/voltage value. Output analog value can be calculated to measured force according to settings.
3. Device configuration 3.1 Connection via USB USB connector is used for communication with WDT11-PC program. After connecting to PC and starting WDT11-PC program there should appear information about connection. Installation of USB port drivers isn’t required. In case While no connection please disconnect USB wait and try to reconnect.
Filtration level = 4, Frequency = 50/sec. Device response time = (4 + 1) x 1000/50 = 100 ms. WDT11 will present complete value of measured force after 100ms since it starts. 3.3 Configuration of 4-20 mA / 0-10 V output Depend on device version is available current 4-20 mA or voltage 0-10 V signal which can be freely calibrated regarding to measured force value.
4. RS485 MODBUS communication RS485 can be used for communication with PLC, HMI or other device using MODBUS-RTU protocol. The RS485 terminal at WDT11 isn’t galvanically insulated so please provide the same ground electric potential for WDT11 and master device (common GND signal).
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Lo registry address 0xA0 Register 0x00 Hi 0xFF Register 0x00 Hi 0xFF Register 0x00 Lo 0x00 Register 0x00 Lo 0x00 CRC HI 0x8F CRC Hi 8 bit CRC LO 0x0C CRC Lo 8 bit WDT11 – operation manual - 11-09-2019 www.wobit.com.pl...
5. Complementary information 5.1 Force sensor types WObit company has a broad offer of force sensors within range from single Newton’s up to hundreds of kilo Newton’s. Depend on assembly and way of measuring force (tension, compression) are available sensors with different shapes (table below).
Temperature operating range 5..50°C Protection degree IP20 Mounting Handle for DIN rail WDT11-I - module with current output (0)4-20 mA WDT11-U – module with voltage output 0-10 V Electrical parameters Power supply 12…24 VDC, < 50mA Force sensors inputs Sensor’s power supply: 5V (also 10 V sensors) Max.
Please protect the device against mechanical damages. Before mounting the WDT11 it is necessary to unpack it. While unpacking please be careful to not to damage the device. After unpacking the device please make sure it was not damaged during transport.
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It is forbidden to extinguish any fire in device environment with water. Please use only special fire-fighting means. CAUTION It is forbidden any remanufacturing and modification of the device without manufacturer’s permission. All non-authorized modification may decrease safety level and/or result in invalid of the warranty. WDT11 – operation manual - 11-09-2019 www.wobit.com.pl...
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