Controlled Products Systems Group SPX-7400 - Manual (Page 11)

Cypress Suprex® F.O. Series - Door Strike and LED I/O
The Cypress SPX-7400 provides additional data channels to support access control hardware such as door strikes, tamper
alarms, request to exit status, etc. These signals are sent to and from the Remote and Central units without the need to run
additional wiring.
The accessory control I/O use active low inputs. When the inputs are floating (nothing connected) the associated output will be
set to a high level. When the input is set to 0Volts (Ground) the input will activate its associated output. All Accessory outputs
are Open Collector type and will switch to Ground when activated.
Each input will have an associated output. See the following pages for a diagram of each I/O pair.Inputs can be tested by
making a jumper connection to ground and monitoring the associated output.
Input
Jumper to ground to test
LED In
Suprex® Fiber Optic
Central
Ground
Suprex® Fiber Optic
Remote
Output
LED Out
Red arrow denotes direction of command signal