GE EST iO64

Chapter 1: System operation
10 EST iO64 and iO500 Technical Reference Manual
LED display expander LEDs
The D16L-iO LED Display Expander provides LED annunciation for up
to 16 zones. The expander provides two LEDs for each zone. Two
LED display expanders can be installed in the panel.
LED operation zones 1 through 12 (and 17 through 28 if the second
LED expander is installed)
• LED 1 - Alarm: Red LED flashes
• LED 2 - Trouble: Yellow LED flashes
LED operation zones 13 through 16 (and 29 through 32 if the
second LED expander is installed)
• LED 1 - Bicolor
Alarm: Red LED flashes
Non-alarm active: Yellow LED flashes
• LED 2 - Trouble: Yellow LED flashes
LED zone designations
Zone 1 Zone 17
Zone 32
Zone 16
LED
expander 1
LED
expander 2
LED 1
LED 2
Zone 13 Zone 29
LED 1
LED 2
Alarm/Non-alarm
and trouble
zone LEDs