М0803 – digital converter of load cells output with built-in remote i/o Principal application fields: continuous batchers, conveyor scales, weighing-in-motion, technological process control.

Hardware features:

• metal case with pressurized cable inlets with protection degree,
• screw inner-case terminals for external circuit switching,
• digital interface RS485 with two sets of clamp connectors,
• rate of exchange up to 115200 bit/s,
• voltage: DC, voltage 19 – 30 V,
• 4 digital outputs of electronic transistor switch type,
• 4 digital inputs, “dry contact” signal source or electronic transistor switch,
• connection of two parallel load cells,
• 24-bit capacity of load cell measuring channel,
• LED indicators:
1. power on instrument board,
2. active level indication for each digital input,
3. diagnostics data
• two modifications:

	М0803 М0803-1 Number of cable inlets 10 6 LEDs for indication of active digital input levels On side wall of the case In the case Number of clamp connectors for load cells connection 2 1

• programmable digital filter of moving average with averaging to 128 values,
• summation of measured values,
• value scanning of weight load measurement channel, in ADC code (24 digits) or engineering unitd (32 digits),
• value output speed (measuring frequency): from 10 to 400 times per second,
• extended status of each measurement,
• elimination of contact chatter of digital inputs,
• control of digital output status,
• current status scanning for digital inputs and outputs,
• Metrabus communications protocol, which is used for value scanning and parameter adjustment,
• two operating modes – “CALIBRATION” and “OPERATION”,
• data block in nonvolatile memory for user data storage,
• built-in converter software update.

The delivery set includes software which allows to adjust instrument and scan instrument network.

	Main technical specification Characteristic value Load cell supplay voltage, V 5 Load resistance in load cell supplay curcuit 80 Number of load cells connected, pcs M0803 2 M0803-1 1 Load cell connection layout 6 wires Working range of load cell signal, mV/V -0.25...+3.75 Cable length for load cell connection, not more, m 100 Main reduced error of load cell signal conversion, per year, not more, % ±0.01 Inherent nonlinearity, not more, of total scale ±0.02 measurement frequency, Hz 10...400 Digital interface, Rs485 Rate of exchange, bit/s 1200; 2400; 4800; 9600; 19200; 38400; 57600; 115200 Lenght of RS485 cable, not more, m 1200 Power supply voltage, V 19...30 Power consumption, not more, AV 1,0 Board (case) dimensions, mm 225*150*160 Weight, not more, kg 1,4