JUNCTION BOARD – 8 CHANNELS
Acquisition of up to 8 weighing channels and transmission of the weights detected via RS232 / RS485 serial. Possibility of using STAND ALONE or associated with a detector with functions for displaying individual weights and adding weights channel simulation, unbalance function, etc. ASCII master / slave standard protocol for weight acquisition, parameter configuration and weighing channel calibration.
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| Power supply | 12/24 V dc – 5 V dc | |
| Max power consumption | 2 W | |
| Isolation | Class II | |
| Installation Category | Category II | |
| Operating temperature | -10 / +40°C (14 °F / 104°F) Humidity maximum 85% non-condensing | |
| Storage temperature | -20 / +50°C (-4 / +122°F) | |
| Display | (optional) Backlit alphanumeric LCD 16 x 2 characters (h = 5mm) | |
| Overall dimensions | 260 x 88 x 56 mm / 10.24 x 3.46 x 2.20 in | |
| Mounting | DIN profile or OMEGA rail | |
| Connections | Removable screw terminals. Pitch screws terminal blocks 5.08 mm | |
| Power supply load cells | 5 V dc / 60 mA (maximum 8 cells with 350 Ω) protected against short circuit | |
| Separated cell inputs | 8 separate cell inputs with the following characteristics (link with reference) | |
| Input sensitivity | ≥ 0,02 μV | |
| Linearity | < 0,01 % of full scale | |
| Temperature drift | < 0,0003 % of full scale/°C | |
| Internal resolution | 24 bit | |
| Weight resolution | Up to 100.000 divisions | |
| Measuring range | -1.5 mV/V to +3.5 mV/V | |
| Output rate | From 3 Hz to 6 Hz (4 channels) | |
| Digital filter | Selectable from 0.2 to 5 Hz | |
| Zero and full scale calibration | Automatic (theoretical), executable through serial port or optional keyboard | |
| Serial port | N° 2: COM1: Rs232c full duplex COM2: Rs485 full duplex. | |
| Max. cable length | 15m (Rs232c) e 1000m (Rs422 e Rs485) | |
| Serial protocols | ASCII, Modbus | |
| Baud rate | 1200, 2400, 4800, 9600, 19200, 38400, 115000 selectable | |
| Program code memory | 60 Kbytes FLASH re-programmable on board via RS232 | |
| Data memory | 4 Kbytes | |
| Conforms to standards | EN 61000-6-3, EN 61000-6-2, EN45501 | |
| Type | Terminal block M1 7P pitch 5.08 |
| Length | ND |
| 1 | + 12 Vcc / 24 Vcc Power supply |
| 2 | GND (power supply) |
| 3 | RS485 + |
| 4 | RS485 - |
| 5 | RS232 Tx |
| 6 | RS232 Rx |
| 7 | RS232 GND |
| Type | Terminal block M2 7P pitch 5.08 |
| Length | ND |
| 8 | Cell 1 cable shield |
| 9 | Load cell 1, Exc. - |
| 10 | Load cell 1, Exc. + |
| 11 | load cell 1, Ref + |
| 12 | load cell 1, Ref - |
| 13 | Load cell 1, signal - |
| 14 | Load cell 1, signal + |
| Type | Terminal block M3 7P pitch 5.08 |
| Length | ND |
| 15 | Cell 2 cable shield |
| 16 | Load cell 2, Exc. - |
| 17 | Load cell 2, Exc. + |
| 18 | load cell 2, Ref + |
| 19 | load cell 2, Ref - |
| 20 | Load Cell 2, signal - |
| 21 | Load cell 2, signal + |
| Type | Terminal block M4 7P pitch 5.08 |
| Length | ND |
| 22 | Load cell 3, signal + |
| 23 | Load cell 3, signal - |
| 24 | Load cell 3, ref - |
| 25 | Load cell 3, ref + |
| 26 | Load cell 3, Exc. + |
| 27 | Load cell 3, Exc. - |
| 28 | Cell 3 cable shield |
| Type | Terminal block M5 7P pitch 5.08 |
| Length | ND |
| 29 | Load cell 4, signal + |
| 30 | Load cell 4, signal - |
| 31 | Load cell 4, Ref. - |
| 32 | Load cell 4, Ref. + |
| 33 | Load cell 4, Exc. + |
| 34 | Load cell 4, Exc. - |
| 35 | Cell 4 cable shield |
General precautions to be followed in the installation and assembly of load cells:
