Mettler Toledo IND780 Guia De Instalacion página 75

Pin 1
Figure 2-77: Discrete I/O Board, Relay
Mode Selector Switch
Figure 2-78: Discrete I/O Mode Selector Switch, Active Position
2.7.7.2.1. Active Input
Selecting the inputs as active enables connection of switches or other simple devices to trigger an
input. No voltage is supplied by the external simple device. An example of how to wire to the active
inputs is shown in Figure 2-79. Note that pin 10, the +5VDC connection, can carry no more than
200 mA current.
Figure 2-79: Example of Active Input from Switches
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METTLER TOLEDO IND780 Installation Guide