VENUE SC48 Guide
236
GPI Output Specifications
The VENUE SC48 GPI connector provides a total of 2 General
Purpose Interface (GPI) Outputs in addition to its 2 inputs.
• Outputs are isolated, floating relay contacts (contact clo-
sure).
• Switched voltage is 200V max; 0.5A max.
• Switched voltage with respect to safety/chassis ground is
300V max.
GPI Output Ground Connections
The GPI Outputs provided are isolated contact-closure style.
Each GPI output is presented on a pair of pins. These two pins
represent the two sides of a switch that can be opened and
closed. If it is desired to drive a signal to ground, then one of
the pins must be wired to ground, and the other to the signal
to be controlled.
GPI Wiring Diagrams
The following diagrams provide examples of GPI pinout and
wiring for a few common uses.
All diagrams are shown from the rear (solder side) of the DB9
connector.
GPI Input Examples
The following diagrams provide simplified wiring examples
for a customer-provided DB9 male connector, to attach to the
female GPI connector on VENUE SC48.
Wiring a Switch to Drive GPI
Wiring a Relay to Drive GPI
VENUE GPI Outputs can switch 500 mA maximum. This
applies even to short term current surges. This limit can be
exceeded when driving a capacitive or incandescent lamp
load. An incandescent lamp may draw as much as ten
times its steady state current when first turned on. There-
fore such lamps are typically not appropriate loads for the
GPI Outputs, and should instead be controlled by a second-
ary relay.
No ground reference needed
between systems.
1
6
DB9M
No ground reference needed
between systems.
1
6
DB9M
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