Mettler Toledo IND780 Guide D'installation page 57

The TTL-compatible open collector output is reserved for use only with the scale's material transfer
target functionality. It provides the signal for the feed output associated with the active target for that
scale. It is not necessary to configure this output.
The output is a current-sinking component which can handle from 5 to 30 volt DC signals at a
maximum of 35 mA current. A solid-state relay or OPTO 22 is typically connected to buffer the
IND780 terminal outputs to a 120 or 220 volt AC signal.
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 2-15 for the recommended maximum cable lengths and
the number of load cells supported by the IND780 PDX option board.
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Table 2-14: POWERCELL PDX Cable Color Code
Wire Color
Pin #
12 V
1 –
2 –
3 White
4 –
5 Blue
6 Red
7 Black
8 –
External Power Supply Connections
9 –
10 –
METTLER TOLEDO IND780 Installation Guide
24 V
–
–
White
–
Blue
–
Black
Red
Red / +24V
Black / GND
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