Carrier 17/19EX User Manual
Page 269
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PSIO Module
Green LED Closest to Communications Connection
— Communication with SMM and 8-
input module; must blink continuously.
Other Green LED
— Communication with LID; must blink every 3 to 5 seconds.
8-Input Modules and SMM
Green LED
— Communication with PSIO module; will blink continuously.
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