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2.3 Connectors
*: Only for -485 model.
2.4 LED Indicators
LED
Indication
POWER
Power Status
SYSTEM
System Status
SIM
SIM Card Status
Signal
Signal 1/2/3
Strength
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7 8
Status
Off
On
Green Light
Red Light
Off
Green Light
Orange
Light
Off
Green Light
PIN
RS232
RS485*
1
---
---
2
---
---
3
GND
---
4
---
---
5
RXD
B
6
TXD
A
PIN
7
8
Description
The power is switched off
The power is switched on
Static: Start-up
Blinking slowly: the system is running properly
The system goes wrong
SIM1 or SIM2 is registering or fails to register (or there
are no SIM cards inserted)
Blinking slowly: SIM1 has been registered and is ready
for dial-up
Blinking rapidly: SIM1 has been registered and is
dialing up now
Static: SIM1 has been registered and dialed up
successfully
Blinking slowly: SIM2 has been registered and is ready
for dial-up
Blinking rapidly: SIM2 has been registered and is
dialing up now
Static: SIM2 has been registered and dialed up
successfully
No signal
Static/Off/Off: weak signals with 1-10 ASU (please
check if the antenna is installed correctly, or move the
antenna to a suitable location to get better signal)
DI
DO
Description
---
OUT
Digital Output
IN
---
Digital Input
---
---
Ground
COM
COM
Common Ground
---
---
Receive Data
---
---
Transmit Data
Description
Positive
Negative
en
4
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