Led Interpretation - Mettler Toledo IND780 Guide D'installation

Figure 2-42 shows wiring definitions for the analog load cell discrete output connector.
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.
2.7.2.3.

LED Interpretation

Figure 2-43 indicates the location of LED on the Analog Load Cell board.
LED
USB
64057253 | 14 | 08/2014
Note for the standard four-wire cable: If an increase in load results in a decrease in weight
display, reverse the signal wires (+SIG and SIG).
Note – The voltage source
must be a Class 2
marked or a Limited
Power Source (LPS)-
compliant power supply
Figure 2-42: Analog Load Cell Discrete Output Connector
USB
Color
Slow blink (~1 Hz) indicates no USB communication with Main PCB
Amber
Fast blink (~4 Hz) indicates USB communication with Main PCB is operating properly
Figure 2-43: Analog Load Cell LED
Table 2-8: Analog Load Cell LED
Function
METTLER TOLEDO IND780 Installation Guide
2-27