Grass Valley Kayenne XL Package Installation v.7.0.2 - Manual (Page 78)

78 Kayenne XL Package — Installation and Service Manual
Section 4 — System Cabling
GPI Inputs
The purpose of the GPI In pins is to provide a stimulus from the customer's
equipment to the switcher.
A simple connection to the two connectors (or four in the case of the 8-RU
frame) activates the corresponding input. This kind of control is suitable for
a connection to a relay contact or to an open-collector output.
WARNING When connecting to an open-collector output, there is no ground potential
isolation between the Video Processor frame and controlling devices.
Since the circuit ground is led out of the device, the cabling has to be
shielded for this kind of control. Non-shielded cables may cause EMC and/
or ESD problems.
To activate a GPI In you must provide switch closure between a particular
GPI In pin and one of the two GPI In Com pins (Pins 1 and 34).