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Quick Start Guide
Global Caché
GC-SC1
Contact Closure Sensor
The Global Caché GC-SC1 is a contact closure sensor. Its circuitry provides a
rapid response to contact closure (4mS typ) with a slow response to contact opens
(75mS typ). This eliminates false triggers due to contact bounce created by
mechanical contacts coming together, such as push buttons or relays. The
following illustrates a typical push button installation along with the GC-SC1
response.
75 mS
4 mS
OPEN
CLOSED
5V
0V
Contact Closure
Sensor Output
GC-SC1 Output Diagram
The GC-SC1 plugs directly into the GC-100 Network Adapter’s IR/Sensor
connector for proper operation. (The GC-100 connector must be configured as
an input. See the GC-100 Quick Start for more information.) The GC-SC1 is
connected directly across the contacts, with the open/close state to be determined.
There is no polarity to the wiring. Below is a typical installation using the GCSC1.
GC-SC1
GC-100
GC-100
Push
Button
Using the GC-SC1 to detect a push button
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The GC-SC1 requires +5V (supplied by the GC-100) to operate and provides a
logic level output representing the contact closure state. The pin assignments are
shown in the diagram below.
Power
Sensor Output
Ground
6 ft. Cable
GC-SC1
Contact Closure
GC-100
Specifications:
Minimum Typical Maximum
Sensor output from contact CLOSE - 4.0 mS 6.0 mS
Sensor output from contact OPEN - 75 mS 90 mS
Steady-state current for contact CLOSE - 50 µA 75 µA
In-rush current at initial CLOSE - 1.5 mA 2.0 mA
Sensor output ON voltage @100µA Vcc – 0.1V - Sensor output OFF voltage @100µA - - 0.1V
Vcc, Supply Voltage 4.50V - 5.50V
Supply Current - 50µA 100µA
Global Caché, Inc.
160 East California Street, PO Box 1659
Jacksonville, Oregon 97530
Phone (541) 899-4800
Fax (541) 899-4808
www.globalcache.com
Support: support@globalcache.com /Sales:
sales@globalcache.com
Copyright ©2007 Global Caché, Inc. All rights reserved.
PN: 0413104-01 ver 5/Information sub j e ct to ch ange without notice.
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