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20
ZETA-xxP Series
Hardware Manual
rev
D
LED Indicators
There are 3 LED outputs on the ZETA-xxP modem coloured Red, Green and Blue.
By default, these show the functional/operational state of the modem. However,
these may also be configured using software control by the user for other indication
purposes.
Table 4
describes the functions of the LEDs.
Table 4.
LEDs
Figure 13.
ZETA-NLP and ZETA-NSP LEDs
Blue LED
Green LED
Red LED
LED
At power up or PWRON_IN / PWROFF_IN control
After power up
Red
Undefined state
Network registration state / call indication
Green
Rapid blink during power on, otherwise off
Off / User defined
Blue
Rapid blink during power off, otherwise off
Off / User defined
On initial application of power, all LEDs will briefly illuminate. During power up, the
green and blue LEDs are controlled directly by the ZETA-xxP power management
controller, and the red LED is controlled by the embedded modem module. While
the ZETA-xxP is in the power up state the green LED will flash rapidly (500mS on,
500mS off) and the Blue LED will be off until the power up process is complete.
ZETA-NLP Variants
After the power on process has completed, red, green and blue LED’s are disabled
completely to save power whilst it is in an operating state. The green LED will
briefly flash once every 30 seconds to indicate that the modem is in the on.
ZETA-NSP, ZETA-NEP and ZETA-GEP Variants
After the power on process has completed, red, green and blue LED’s are
controlled directly by the module using the standard set of AT commands seen on
Power Up LED States
Blue LED
Green LED
Red LED
Figure 14.
ZETA-NEP and ZETA-GEP LEDs
