7
Defender 5000 Indicators Service Manual
1.6
EXTERNAL CONNECTIONS
This section of the manual explains the external connection of the product.
1.6.1 Scale Base with Connector
Ohaus bases with a connector can be attached to the external load cell connector (Figure 1-1, item 12). To
make the connection, plug the base connector onto the external load cell connector. Then rotate the base
connector’s locking ring clockwise. Refer to section 1.7.2 for bases without a connector.
1.6.2 RS232 interface Cable to TD52P
Connect the optional RS232 cable to the RS232 connector (Figure 1-1, item 11).
Pin
Connection
1
N/C
2
TXD
3
RXD
4
N/C
5
GND
6
N/C
7
CTS
8
RTS
9
N/C
1.6.3 AC Power to TD52P
Connect the AC power cord (supplied) to the power receptacle (Figure 1-1, item 10), then connect the AC
plug to an electrical outlet.
1.6.4 AC Power to TD52XW
Connect the AC plug to a properly grounded electrical outlet.
1.6.5 Battery Power
The indicator can be operated on a rechargeable battery pack (not supplied) when AC power is not
available. It will automatically switch to battery operation if there is power
failure or the power cord is removed. The indicator can operate for up to 21
hours on battery power. During battery operation, the battery charge symbol
indicates the battery status. The indicator will automatically turn-off when the
batteries are fully discharged. Find detailed installation information in battery
pack (P/N 30424405) operation manual.
1.7 Internal Connections
Some connections require the housing to be opened.
1.7.1 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.
TD52P
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.
Figure 1-4 RS232 Pins
