
GPIO and Remote Connections in MX Ultranet and MX Sync
Vicon MX Hardware System Reference B-3
The GPOs are driven from a single channel of the output optocoupler.
Each open collector output is connected internally to the +5V supply
via a 270
Ω resistor and a diode. This output behaves in a similar
manner to a TTL signal. When connected to a high impedance load,
the output swing is between 0V-4.3V.
GPI Optically isolated
All GPIs, including Remote Start and Remote Stop, are connected to
one channel of the high CMR optocoupler. Connecting any one of
these inputs to 0 V activates the required function.
Gated Reference
Amplitude 2V peak to peak when terminated in
75
Ω
Pulse Direction Negative going
Pulse Duration
80
µS
Pulse Frequency Once per Vicon video frame (only
enabled during capture)
This signal goes low for 80
µS when the system is either armed or
capturing. At all other times it stays high.
External Clock
Amplitude 2V peak to peak when terminated in
75
Ω
Pulse Direction Positive going
Pulse Duration
3.7
µS
Pulse Frequency Multiple of the video frame rate
specified for MX Cameras
(synchronous to video). For details,
see your Vicon software
documentation.
Table B-2:GPIO & Remote Socket Electrical Specifications
Component Specification
MXhardware_Reference.book Page 3 Monday, April 30, 2007 1:56 PM
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