Mettler Toledo IND780 Manuel D'installation page 55

Figure 2-42 shows the terminal strip connections for this board.
Solid State
Relay or
OPTO 22
Figure 2-42: PDX Option Board Connections
Depending on the number of load cells and the cabling configuration, the IND780
terminal uses either its internal 12 VDC supply (via pins 6 and 7) or an external
24 VDC supply (via pins 7 and 8) to power the load cells. Refer to Table 2-6 for
the recommended maximum cable lengths and the number of load cells supported
by the IND780 PDX option board when using its internal 12 VDC supply.
Table 2-6: Recommended Maximum Cable Lengths (for +12 VDC)
Total Cell-Cell Cable
(meters/feet)
60/197
80/262
85/278
100/328
100/328
140/459
Figure 2-41: PDX Option Board
Load Cells
Auxiliary Power Supply
Home Run Cable
(meters/feet)
300/984
250/820
200/656
100/328
85/278
50/164
IND780 Installation Manual
Number of
PDX Cells
< 8
< 10
< 12
< 12
< 14
< 14
2-27