15
SURE-FI, INC. |
www.sure-fi.com
Sure-Fi Serial Data Bridge
Relays
Operating the relays
The relay outputs are operated by the corresponding relay inputs that are on the paired unit. For example, to
activate Relay 1 on the Remote Interface, the Relay 1 input (R1 IN) on the Central Interface must be shorted to
ground (0VDC) using either a dry relay contact, a switch, or a digital voltage 0 to 5VDC interface. This can be
tested by connecting a switch to the Controller Interface R1 IN and GND or connecting them to an access
panel output relay NO and COM terminals. When the switch or the access panel output relay closes, the R1 IN
will be put to GND (0V) and will cause the Relay 1 output on the Remote Interface to activate.
Relay In/out control
Relay 1 & 2 Outputs located on the Remote Interface: operated by R1 IN & R2 IN on the Central Interface.
Relay 3 & 4 Outputs located on the Central Interface: operated by R3 IN & R4 IN on the Remote Interface.
RF-Link/Alert Relay
The RF-Link/Alert Relay is used to indicate if the RF communications with the Remote unit is lost and to
indicate if power is lost at the Central unit. During normal operation green ÄRF-LINKÅ LED will be on and the
relay will be energized whereas the NO terminal will be shorted to the COM terminal. If the RF
communications is lost with the Remote unit the green ÄRF-LINKÅ LED will turn off and the relay will de-
energize allowing the NO terminal to open (disconnect) from the COM terminal. Additionally, if power is lost
at the Central unit, the relay will de-energize and open the relay NO terminal from the relay COM terminal.
LEDS
1. POWER and BATTERY LEDS (Green): these two LEDs provide power and battery input status
information. See the ÄLED DiagnosticsÅ section for more information.
2. Rx LED (Red): The Rx LED will flash ON once briefly when a Sure-Fi radio transmission is received.
3. Tx LED (Yellow): The Tx LED will flash ON once briefly upon a radio transmission. The Tx LED will flash
ON only on the unit that initiates the message.
4. RF-LINK/Alert LED (Green): LED will be On solid during normal operation and will be Off during Alert
conditions.
5. System Status (Orange): LED provides flash codes
The Test Push Button (Range Test)
Range Test: Pressing and releasing the ÄTestÅ button quickly initiates the Range Test. The Range Test feature is
used to test the signal strength of the radio transceiver with the paired unit and displays the results of a
received transmission on the six blue LEDs, these are labeled ÄSignal Strength LEDS (1 Ç 6)Å in Figure 1.
Maximum signal strength is indicated when LEDs 1 through 6 all flash ON and minimum signal strength is
indicated when only LED 1 flashes ON
