MLis MLB-G420 Series, User Manual

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The functions of LED are indicated on the table below.
LED Color State Description
PWR1 (DC) Green On Power is being supplied from power input 1.
PWR2
(Terminal Block) Green On Power is being supplied from power input 2.
READY Green On System startup is complete and the system is operating with IP
address obtained.
Blink Device has been located.
Off Power is off, or the system is booting up.
FAULT Red On System configuration error or a relay event has occurred.
Blink IP address conflict.
Off Power is off, or there is no error condition.
SINGNAL
(3LEDs)
Green
On Number of LEDs to indicate cellular signal level when registered
to a base station.
Signal LED 1: 0 < RSSI ≤ 12
Signal LED 2: 12 < RSSI ≤ 21
Signal LED 3: 21 < RSSI ≤ 31
SIM1 Amber On/Off SIM 1 is active or inactive.
Blink SIM 1 is not inserted or PIN code is incorrect.
SIM2 Amber On/Off SIM 2 is active or inactive.
Blink SIM 2 is not inserted or PIN code is incorrect.
MLB-G4202
4G
Amber
On Registered to a base station with cellular connection in LTE
mode
3G Amber
On Registered to a base station with cellular connection in UMTS
or HSPA mode
MLB-G4201
3G Amber
On Registered to a base station with cellular connection in UMTS
or HSPA mode
2G Amber
On Registered to a base station with cellular connection in GPRS or
EDGE mode
Table 4: LED Functions of MLB-G420X