Manual

Figure 17: Protocol Select Jumpers
2.4 General Purpose Outputs
A unique feature of the VK204-25 is the ability to control relays and other external devices using a
General Purpose Output, which can provide up to 20 mA of current and +5Vdc from the positive side of
the GPO. This is limited by a 240 ohm resistor which is located directly above the positive pin as pictured
below in figure 21. 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
+ MAX: 20 mA, +5Vdc
Figure 18: General Purpose Output
Matrix Orbital VK204-25 12