INDICATOR LEDS
7
7 INDICATOR LEDS
green
yellow
green
yellow
green
blue/red
yellow
green
yellow
green
Figure 44 – Indicator LEDs
There are ten Indicator LEDs which signal power, communication, and I/O activity and are
visible from the SC4000 outside cover.
The Power LED is blue when power is correctly applied to the SC4000 and the power switch
is turned on.
This LED is red if power polarity is incorrect. In this case any optional reading device
connected to the 25-pin connector as well as the Backup Module are protected.
CAUTION
If external I/O devices are powered through SC4000 (connected to +V/-V),
they are not protected from polarity inversion.
The Ready LED is on after the power-up or reset sequence is complete.
The Host 1, Host 2, and ID-NET LEDs are active when communicating on the respective
interface (fast blinking).
The remaining I/O LEDs are active when the respective I/O is active depending on the
software configuration setting.
41
