Rice Lake PR5230 Fieldbus Transmitter - Manual (Page 33)

PR 5230 Instrument Manual Options
Sartorius EN-33
3.2.8.3 Potential-free Load Cell Supply Voltage
The instrument with option WE1 will be delivered with an intrinsically safe circuit which is galvanically
connected with the equipotential bonding (PA).
Jumper J250
At distances >50 m a potential-free load cell supply voltage is required. This is done as follows:
• Cut the jumper J250 on the weighing electronics board.
• Turn the remaining wire leads upward and cut them just above the board. Make sure that both contacts
have a minimum distance of 2 mm and don’t touch other potentials.
If the jumper J250 is open, the intrinsically safe circuit is isolated from the housing (PA) at a minimum test
voltage of 500 V.