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Cypress Suprex® RF Series - Accessory I/O - Remote Relay Inputs
To activate the relay on the Central unit, connect as shown below. These connections can be used to operate a REX
switch or other signals that need to go to the access panel.
Relays 3 and 4 are available for accessory outputs at the Central end. Either Relay 3 or Relay 4 can be used. This
example uses Relay 4. The Relay Input pin is normally high (5V). When the Relay Input pin is pulled low (0Volts) the
corresponding relay on the Remote unit will be activated. When the relay is activated, the relay output pins will change
continuity from N.C. and COM to N.O. and COM (not shown in diagram).
Relay 3 can used to send signals to the access panel while Supervision mode is active, but it is important to remember
that the outputs will be reversed. When Supervision mode is active and the Relay 3 Input pin is normal (5V) the relay
output pins will have continuity between N.O. and COM. When Supervision mode is active and the Relay 3 Input pin is
active (0Volts) the relay output pins will have continuity between N.C. and COM.
Relay Wiring Example - REX Switch
+8 to +16 VDC
Ground
exp(+)
exp(-)
+5V Out
Relay 4 Input
Relay 3 Input
LED Out
D1/Data In
D0/Clock In
Relay 2 N.O.
Relay 2 Com
Relay 2 N.C.
Relay 1 N.O.
Relay 1 Com
Relay 1 N.C.
Ground
Aux Input
Not Used
Not Used
Remote
