S300 Expansion Enclosures CK721-A Installation and Operation
3-18 24-10349-8 Rev. B
This document contains confidential and proprietary information of Johnson Controls, Inc.
© 2012 Johnson Controls, Inc.
The power supply provides the DC power for the modules and readers:
+5 VDC at 1.5 A to power the modules and readers.
+12 VDC at 2.0 A to power reader lamps and output relays.
The power supply has three LEDs.
During normal operation, all LEDs should be lit. If only the green and yellow lights
are lit, check your AC power connection. If LED1 is off while LED2 and LED3 are
on, the power supply is getting its power from the battery. If the battery voltage goes
below 9.8V, the power supply will switch off the 5V and 12V (LED2 and LED3)
until AC power is restored. If none of the LEDs light when plugging in AC power,
verify that AC power is active.
Table 3-3: Power Supply Components
Component Description
J1 24V AC Power Connector
J2 Lamp Connector
J3 Battery Backup Connector
J4 Power connector to modules
JP1 Basic Panel - Jumper installed, EXT to center
Expansion Enclosure - Jumper installed, Auto to center.
JP4 “AC-FAIL” pull-up enable, jumper installed
F1 Fuse, 5A, 3AG, 250V, Slo-Blo
F2 Fuse, 1A, 3AG, 250V, Slo-Blo
LEDs Three LEDs indicate the presence of AC power,
5 and 12 VDC as labeled.
Table 3-4: LEDs On Power Supply
LED State of LED Meaning
LED1 (Red) ON AC is present
LED2 (Green) ON 5 VDC is present
LED3 (Yellow) ON 12 VDC is present
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