2-83
Cable Connections
GPI Connections
The four GPI connectors on the rear panel of the Signal Processor Frame provide
eight input and eight output GPI connections. See
provide a variety of user-assignable GPI applications such as remote control of
Auto Transitions, DSK mix, Fade-to-Black Transitions and other selected
functions. Refer to “External Interface Setup” later in this section for defining GPI
inputs.
GPI Inputs—
GPI inputs are opto-isolators. These pairs of input connectors are
numbered 1 through 8 with a chassis ground connection on the bottom and +5V
connection on the top end of each connector module. To trigger the GPI input, a
DC voltage must be applied across the pair of terminals for that input. Voltage
must be between 4V and 24V, either polarity. When the device used to trigger this
input has a pair of relay contacts available, the following wiring connection is
recommended (Input 6 shown in the following example).
Connect the appropriate GPI DC input signals to the GPI INPUTS connectors TB1
and TB2. See
GPI Outputs—
Each GPI output consists of pairs of connections on the rear of the
Frame, which are connected to an isolated pair of relay contacts (SPST; normally
open). These pairs of output connectors TB 3 and TB 4 are numbered 1 through 8
with a chassis ground connection on both ends of each connector module. These
relay connections are rated at 500mA (peak) for voltages not to exceed 30 volts
peak (AC or DC) with respect to chassis ground.
Connect the appropriate GPI output connections to GPI OUTPUTS connectors TB3
and TB4. Record these output connections for use by the operator when attaching
the triggers to E-MEM recalls.
Summary of Contents for Grass Valley 4000
Page 3: ...iii Tektronix Grass Valley Products P O Box 1114 Grass Valley CA 95945 916 478 3800 ...
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Page 138: ...2 104 Section 2 Installation ...
Page 196: ...3 58 Section 3 Functional Description ...
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