OHAUS 80500720 Manuel D'instructions page 10

EN-8
2.5 80500721 Installation in T51XW and T71XW
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 2.7 when performing these steps.
1. Remove the hex bolts from the corners of the rear housing.
2. Pull the front housing forward.
3. Attach the relay pc board to the rear housing using the four machine screws
supplied.
4. 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. Then skip to step 6.
5. Secure the long cable to the cable tie mount using the cable tie.
6. Feed the cable from the external device through the strain relief bushing furthest
from the power cord.
7. Attach the wires of the cable to the terminal block on the relay pc board.
8. Pull the excess cable through the strain relief bushing and tighten the external nut
on the bushing.
9. Attach a cable tie around the cable near the strain relief to prevent the cable from
pulling out.
10. Install the terminal cover over the terminal block using the two machine screws
supplied.
11. Close the housing and reinstall the four hex bolts.
Relay Option Kit