Chapter 29: Console Reference
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Chapter 29: Console Reference
This chapter describes the GPI port and its capabilities on the
VENUE SC48 console.
GPI (General Purpose Interface)
GPI Input Specifications
A 9-pin, female DB9 connector provides a total of 2 General
Purpose Interface (GPI) Inputs and 2 Outputs.
• Inputs are logic inputs with pull-ups. They may be driven by
logic outputs or contact closure to ground.
• Input signal range is 0 to 5.5V. The inputs are ESD protected.
• Input signaling uses standard TTL logic levels: 0.8V or less
for a logic low. 2.0V or greater for a logic high.
• Inputs are compatible with 5V TTL (e.g. 74LS series), 5V
CMOS (e.g. 74HC series), 3.3V CMOS (e.g. 74LVC series)
• Inputs provide an internal 5K ohm pull-up to +5V.
• All Inputs are referenced to the same internal ground,
which is connected to AC safety ground.
GPI Connector Pin Assignments
The SC48 GPI port is a female DB9 connector that provides
two GPI inputs and two GPI outputs.
Pinout for GPI Connector
DB9 GPI Connector Pin Assignments
Pin Number
Function
Comments
1
Input 1
Logic level (TTL, CMOS)
input with pullup
2
Input 2
Logic level (TTL, CMOS)
input with pullup
3, 8
Output 1
Floating contact closure
output
4, 9
Output 2
Floating contact closure
output
5, 6, 7
Ground
All ground pins are con-
nected internally
Pinout for VENUE SC48 DB9 GPI port (looking at back of console)
5
4
3
2
1
9
8
7
6
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