Controlled Products Systems Group SPX-5501 - Manual (Page 14)

Relay 3 functions as an Alarm relay and monitors the condition of the communication link between
the Central and Remote units. Relay 3 is activated when power is applied and the communication link between
the Central and Remote is functioning. Relay 3 will become deactivated (Alarm condition)
when either the Relay 3 input on the remote is active OR the Remote unit is unable to communicate with the
Central unit. See APP NOTE FOR DETAILS
Cypress Suprex RF Series - Relay Controls
Relay 4 N.O
Relay 4 Com
Relay 4 N.C.
Suprex Remote
Contact
Outputs
Relay 4 IN
Input Signal
(5Volts DC
Maximum)
Suprex Central
Suprex Remote
Relay 3 IN
Input Signal
(5Volts DC
Maximum)
Contact
Outputs
Relay 3 N.O.
Relay 3 Com
Relay 3 N.C.
Suprex Central
Red arrow denotes direction
of command signal