User Guide
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Eclipse HX-PiCo
Page 34
Circuit board components include CMOS chips that are
sensitive to static electricity.
Before touching the matrix’s circuit board touch a grounded
metal object, such as any unpainted surface on the matrix, to
dissipate static electricity. When handling a circuit board, be
careful not to bend any of the board’s connector pins or
component leads.
Figure 9: Opto-Isolated connection to Eclipse HX-PiCo GPI connector
In this mode, a DC voltage of between 7 - 24 V is required at the pin
with relation to the EXTVIN– pin. To cause an input to detect an active signal
current must be sent from the relevant input pin.
The external device should draw no current to cause an inactive input and at least
5 mA to cause an active input. The opto-isolator drive line contains a 1.5 kOhm
resistor to limit the current through the opto-isolator. It is therefore possible to
connect the input pins directly to the EXTVIN– level to cause an active input.
Note:
The voltage level at the external input pin should not be allowed to go below
EXTVIN– or above +6 V with respect to EXTVIN–.
