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Sure-Fi Serial Data Bridge
Providing Power
Each unit requires a 12VDC supply that can source at least 1A. If a Maglock, Door Strike, or other device is to
be powered through an on-board wet relay, then the additional power required for those devices will need to
be considered when selecting a power supply. Additionally, a battery backup (SLA type) can be connected if
required.
Battery Backup Charging and UPS Functionality
The Serial Data Central and Remote Interfaces both provide a charging voltage for a 12V sealed lead acid
battery backup and they also have uninterruptable power supply (UPS) functionality. The UPS will
automatically switch to the battery backup whenever the 12VIN wall power goes out and will then switch back
to the 12VIN wall power when it returns.
Power and Battery LED Diagnostics/Flash codes
The two green LEDÅs that are labeled ÄPOWERÅ and ÄBATTERYÅ are used to provide the status of the 12VDC
input power and the Battery input voltage. The LED status information is described here:
Power Status: POWER LED
LED STATE
DESCRIPTION
ON
Normal input voltage. Voltage is between 9VDC to 15VDC
Slow Flash (1Hz)
Detected input voltage is below 7VDC. Check for proper input voltage
Fast Flash (2Hz)
Detected input voltage is above 15VDC. Check for proper input voltage
OFF
No input power or device not functioning properly
Battery Status: BATTERY LED
LED STATE
DESCRIPTION
ON
Battery voltage normal
Slow Flash (1Hz)
Low battery voltage. Battery voltage is less than 11.0VDC
Fast Flash (2Hz)
Battery voltage high. Maximum Battery voltage is 13.8VDC
OFF
No battery connected: Detected battery voltage is less than 1VDC
NOTE: The POWER LED and BATTERY LED will flash in an alternating pattern if the input voltage drops too low during a
radio transmission and is an indication that the power supply being used is faulty or under rated.
