Ohaus DEFENDER 3000 METAL WEIGHING INDICATOR Manual en - Manual (Page 13)

EN-11 3000 Series Indicators
2.3 Internal Connections
Some connections require the housing to be opened.
2.3.1 Opening the Housing
CAUTION: ELECTRICAL SHOCK HAZARD. REMOVE ALL POWER CONNECTIONS TO THE INDICATOR
BEFORE SERVICING OR MAKING INTERNAL CONNECTIONS. THE HOUSING SHOULD ONLY BE OPENED
BY AUTHORIZED AND QUALIFIED PERSONNEL, SUCH AS AN ELECTRICAL TECHNICIAN.
Remove the four Phillips head screws from the rear housing.
Open the housing being careful not to disturb the internal connections.
Once all connections are made, reattach the front housing.
2.3.2 Scale Base to the indicator
Pass the load cell cable through the strain relief (Figure 1-1, item 10) and attach it to terminal block J7 (Figure 1-2, item 5).
Jumper Connections
For a 4-wire load cell with no sense wires: Jumpers W1 and W2 must be shorted.
For a 6-wire load cell that includes sense wires, see Figure 2-2. Jumpers W1 and W2 must be opened.
For load cells with an extra ground shield wire: Connect the shield to the center position (GND) of J7.
Pin Connection
J7-1 +EXCITATION
J7-2 +SENSE
J7-3 +SIGNAL
J7-4 GROUND
J7-5 -SIGNAL
J7-6 -SENSE
J7-7 -EXCITATION
Figure 2-2. Jumper Connections.
After wiring is completed and jumpers are in place, replace the indicator housing screws. Make sure the strain relief is properly
tightened.