The main operating features of indicator MC 302 are Batch-in of up to 12 ingredients or Batch-out of 1 ingredient.

The main operating features of indicator MC 302 are Batch-in of up to 12 ingredients or Batch-out of 1 ingredient. The batching sequences can be programmed by the operator. The storage of up to 50 different recipes eliminates the need to constantly change set-point values when producing multiple products. It features in-flight correction, tolerance checking and individual accumulators. Both the ingredients and the recipes can be totalised individually. The system configuration provides for the following optional installations analog output, alibi memory, BCD output through an external card, Profibus-DP output through an external module for DIN guide.

Technical documentation

Power supply 230 Vac 50/60 Hz (115 Vac optional)
Power consumption 15 VA
Insulation Class II
Installation category Cat. II
Operating temperature -10°C - +40°C (max. humidity 85% without condensation)
Storage temperature -20°C - +50°C
Weight display 7 digits red LED’s, 7 segments (14 mm high)
Status LED’s 7 red LED, ∅3 mm
Keyboard Membrane keyboard with 14 keys and buzzer
Overall dimensions 144 x 72 x120 mm (l x h x d) (DIN43700)
Panel cut-out 139 x 67 mm
Case Fireproof Noryl (UL 94 V1)
Front panel protection level IP54
Connections Pull-out terminal blocks pitch 5.08 (power supply pitch 7.5 mm),
  serial ports on 9 poles SUB-D connector.
Load cell excitation 5 Vdc / 120 mA (max. 8x350Ω load cells) short circuit proof
Input sensitivity 0.02 µV min.
Linearity < 0.01% of the full scale
Temperature drift < 0.0003% of the full scale / ºC
A/D converter resolution 24 bit
Displayed weight resolution Up to 600,000 divisions on the total capacity (10,000 divisions in
  case of “legal for trade”)
mV/V input signal range From -3.9 to +3.9 mV/V
Weight acquisition frequency 6 Hz - 160 Hz
Digital filter Programmable from 0.2 Hz to 50 Hz
Weight decimal digits 0 to 4 decimal digits
Zero and full scale calibration Data-sheet or Dead-load calibration
Logic outputs 6 relays (NA contact) max 115 Vac/30 Vdc, 0.5 A each
  Optional: Up to 2 external 8-relay modules. Features as above
Logic inputs 8 opto-isolated 12 Vdc / 24 Vdc PNP
Serial ports (2) COM1: Rs232c half duplex
  COM2: Rs422/Rs485 half duplex.
Maximum cable length 15m (Rs232c) and 1000m (Rs422 and Rs485)
Serial protocols ASCII, Modbus RTU, EPSON or Alfapanel Printers
Baud rate 1200, 2400, 4800, 9600, 19200, 38400, 115000 selectable
Programme code memory 128 Kbytes FLASH resettable on board by RS232
Data memory 8 Kbytes extendable to 36 Kbytes
Optional alibi memory 1 Mbyte (up to 160,000 weighing procedures recorded)
Clock / calendar On mother board with buffer battery
Analog output Voltage: 0 - 10 V / 0 - 5 V Current: 0 - 20 mA / 4 - 20 mA
Resolution 16 bits
Calibration Digital via keyboard
Impedance Voltage: minimum 10KΩ Current: maximum 300Ω
Linearity 0.03% of the full scale
Temperature drift 0.001% of the full scale / ºC
Conformity to Standards EN50081-1, EN50082-2, EN61010-1, EN45501