Owner manual

Figure 14: Serial Header
the GPO. This is limited by a 240 ohm resistor which is located to the above right of the GPOs as pictured
below in figure 15. If the device, which is being driven by a GPO, requires a relatively high current (such as
a relay) and has an internal resistance of its own greater than 250 ohms, then the 240 ohm resistor may be
removed and replaced with a Jumper.
GND Ground (0VDC)
VCC +5VDC at 20 mA
Figure 15: General Purpose Output
WARNING If connecting a relay, be sure that it is fully clamped using
a diode and capacitor in order to absorb any electro-motive force (EMF)
which will be generated.
Matrix Orbital VK204-25-USB 11