Transmitter JBOX8


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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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Transmitter JBOX8

Technical Specifications

Power supply12/24 V dc 5 V dc
Max power consumption2 W
IsolationClass II
Installation CategoryCategory II
Operating temperature-10 / +40C (14 F / 104F) Humidity maximum 85% non-condensing
Storage temperature-20 / +50C (-4 / +122F)
Display(optional) Backlit alphanumeric LCD 16 x 2 characters (h = 5mm)
Overall dimensions260 x 88 x 56 mm / 10.24 x 3.46 x 2.20 in
MountingDIN profile or OMEGA rail
ConnectionsRemovable screw terminals. Pitch screws terminal blocks 5.08 mm
Power supply load cells5 V dc / 60 mA (maximum 8 cells with 350 Ω) protected against short circuit
Separated cell inputs8 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 resolution24 bit
 Weight resolutionUp to 100.000 divisions
 Measuring range-1.5 mV/V to +3.5 mV/V
 Output rateFrom 3 Hz to 6 Hz (4 channels)
 Digital filterSelectable from 0.2 to 5 Hz
 Zero and full scale calibrationAutomatic (theoretical), executable through serial port or optional keyboard
Serial portN 2: COM1: Rs232c full duplex COM2: Rs485 full duplex.
 Max. cable length15m (Rs232c) e 1000m (Rs422 e Rs485)
 Serial protocolsASCII, Modbus
 Baud rate1200, 2400, 4800, 9600, 19200, 38400, 115000 selectable
Program code memory60 Kbytes FLASH re-programmable on board via RS232
Data memory4 Kbytes
Conforms to standardsEN 61000-6-3, EN 61000-6-2, EN45501
For the complete and latest technical specifications, please refer to the technical data sheet which can be downloaded here:
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Connections

TypeTerminal block M1 7P pitch 5.08
LengthND
1+ 12 Vcc / 24 Vcc Power supply
2GND (power supply)
3RS485 +
4RS485 -
5RS232 Tx
6RS232 Rx
7RS232 GND
TypeTerminal block M2 7P pitch 5.08
LengthND
8Cell 1 cable shield
9Load cell 1, Exc. -
10Load cell 1, Exc. +
11load cell 1, Ref +
12load cell 1, Ref -
13Load cell 1, signal -
14Load cell 1, signal +
TypeTerminal block M3 7P pitch 5.08
LengthND
15Cell 2 cable shield
16Load cell 2, Exc. -
17Load cell 2, Exc. +
18load cell 2, Ref +
19load cell 2, Ref -
20Load Cell 2, signal -
21Load cell 2, signal +
TypeTerminal block M4 7P pitch 5.08
LengthND
22Load cell 3, signal +
23Load cell 3, signal -
24Load cell 3, ref -
25Load cell 3, ref +
26Load cell 3, Exc. +
27Load cell 3, Exc. -
28Cell 3 cable shield
TypeTerminal block M5 7P pitch 5.08
LengthND
29Load cell 4, signal +
30Load cell 4, signal -
31Load cell 4, Ref. -
32Load cell 4, Ref. +
33Load cell 4, Exc. +
34Load cell 4, Exc. -
35Cell 4 cable shield
Connections  Transmitter JBOX8

MOUNTING OF THE LOAD CELL

General precautions to be followed in the installation and assembly of load cells:

  • Follow the direction of application of force on the load cell
  • Do not exceed the limits of the temperature as indicated in the data sheet
  • Do not remove labels from the load cell
  • Adequately protect the cables with sleeves or channels
  • Carry out on each load cell a ground connection with suitable cable, shunt on mounting accessories
  • Do not carry out any welding on the mechanical structure after mounting the load cell
  • Avoid or reduce to a minimum level any mechanical constraints between the rigid structure and the weighing structure to avoid error in weighing and return to zero
  • In case of vibration or dynamic loads product the load cells with puffers / shock absorbers
  • Protect load cell from any dust accumulation with any appropriate means