Holtgreven Ohaus Defender Series Bench Scales - Manual (Page 14)

EN-12 5000 Series Indicators
2.2.6 Mounting Bracket
Position the wall bracket over the threaded holes in the side of the indicator as shown in Figures 8-1 or 8-2 and install the
knobs. Adjust the indicator to the desired angle and tighten the knobs.
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.
T51P
Remove the four Phillips head screws from the rear housing.
Remove the front housing being careful not to disturb the internal connections.
Once all connections are made, reattach the front housing.
T51XW
Remove the four hex head screws from the rear housing.
Open the housing by carefully pulling the front housing forward.
Once all connections are made, reattach the front housing.
The screws should be tightened to 2.5 N
•
m (20-25 in-lb) torque to ensure a watertight seal.
2.3.2 Scale Base Without Connector to T51P or T51XW
Bases without a connector must be attached to the internal load cell connector on the main
PC board. Pass the load cell cable through the strain relief (Figure 1-1, item 13 or Figure 1-2,
item 13) and attach it to terminal block J4 (Figure 1-3, item 2). Tighten the strain relief to
maintain a watertight seal.
Pin Connection
J4-1 +EXE
J4-2 +SEN
J4-3 +SIG
J4-4 GND
J4-5 -SIG
J4-6 -SEN
J4-7 -EXE
Jumper Connections
For a 4-wire load cell with no sense wires: Jumpers W1 and W2 must be left in place shorting
the two pins.
For a 6-wire load cell that includes sense wires, Jumpers W1 and W2 must be removed.
For load cells with an extra ground shield wire: Connect the shield to the center position (GND)
of J4.
Figure 2-2. Jumper Connections.
After wiring is completed and jumpers are in place, replace the indicator housing screws. Make sure the liquid-tight connector is
properly tightened.