Clear-Com HX System Frames - Manual (Page 33)

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 a
ground pin to cause an active input.
Note:
The voltage level at the external input pin should not be allowed to go below ground or above
+6 V with respect to ground.
Opto-Isolated Mode
If required the Eclipse HX-PiCo matrix can be operated in fully opto-isolated mode. The unit
must be taken out of service and powered down before this change is made.
To operate the Eclipse HX-PiCo matrix in opto-isolated mode
1. If the Eclipse HX-PiCo unit is connected to AC power, disconnect it from AC power.
2. Remove the top cover of the Eclipse HX-PiCo matrix by unscrewing the 12 M3 x 6 flat
screws and lifting the cover upwards.
3. On the internal circuit board, move the jumper located under the heading J6 from pins
2-3 (marked INT) to pins 1-2 (marked ISO).
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 EXTVIN+ 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
33 Eclipse HX-PiCo User Guide