Mettler Toledo IND780 Guide D'installation page 65

4. Twist the home run cable's inner drain wire together with the black and green ground wires and
2.7.4.3.4. Open Collector Output
The POWERCELL PDX option board provides a single TTL-compatible open collector output (pin 1
and pin 2), with current sinking components that can handle from 5 to 30 VDC signals at a
maximum of 35 mA current. A solid state relay or OPTO 22 is typically connected to buffer the
output to a 120 or 220 VAC signal. The voltage source must be a Class 2 marked or a Limited
Power Source (LPS)-compliant power supply.
This output is reserved for use with the scale's material transfer target functionality. It provides the
feed output signal associated with the active target for a POWERCELL PDX scale assigned as scale
1.
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attach them to the external ground stud, as shown in Figure 2-67.
Inner drain wire
and ground wires
Panel enclosure
grounding stud
Figure 2-67: Completed POWERCELL PDX Home Run Power Ground Connection,
Panel Mount Enclosure
METTLER TOLEDO IND780 Installation Guide
Ground wire
connected to pin
7 of PDX option
board
2-41