Ohaus DEFENDER 5000 BENCH SCALES Relay Option Kit Manual multi - Manual (Page 8)

EN-6 Relay Option Kit
2.4 80500720 Installation in T51P and T71P
WARNING: ELECTRICAL SHOCK HAZARDS EXIST WITHIN THE
HOUSING. THE HOUSING SHOULD ONLY BE OPENED BY AUTHORIZED
AND QUALIFIED PERSONNEL. REMOVE ALL POWER CONNECTIONS TO
THE UNIT BEFORE OPENING. IF THE UNIT CONTAINS AN OPTIONAL
RELAY CONTROL BOARD, ADDITIONAL AC OR DC POWER
CONNECTIONS MAY STILL EXIST WITHIN THE HOUSING.
Refer to Figure 2.6 when performing these steps.
1. Remove the four screws from the corners of the rear housing.
2. Pull the front housing forward.
3. Remove the plastic hole cover located next to the power connection from the
rear housing.
3. Install the strain relief bushing in the exposed hole next to the power connection.
4. Attach the relay pc board to the rear housing using the four self tapping screws
supplied.
5. Connect the long cable to one of the 9 pin connectors on the relay pc board and
connector J8 on the main pc board.
Note: If an optional RS232 or RS485/422 pc board is already installed, do not
use the long cable. Connect the short cable between the relay pc board and the
optional RS232 or RS485/422 pc board instead.
6. Feed the cable from the external device through the new strain relief bushing and
under the right side of the main pc board.
7. Attach the wires of the cable to the terminal blocks on the relay pc board.
8. Position the cable in the slots along the right side of the rear housing.
9. Pull the excess cable through the strain relief bushing and tighten the external
nut on the bushing.
10. Install the terminal cover over the terminal block using the two self tapping
screws supplied.
11. Close the housing and reinstall the four screws.