User manual

Chapter 3 Basic Settings Page 21
Interface Definition
The SGT-LD-5-23 currently provides two interfaces at the bottom, which are PoE + Data with a black
plastic cover and RS-232 with a light gray cover that label “WARNING! No PoE”. Amongst which, a
black RJ45 waterproof connector will be provided for the PoE + Data interface.
Figure 9 Interface Definition
RS-232
RS-232, which is labeled COM/RESET, is used for debugging purposes as well as for a hard reset of
the SGT-LD-5-23. Below, you may find the pin definition of the RS-232.
Table 1 PIN Definition
Pin Assignment
Name
Description
P1
TXD0
Data Transmit 0
P2
DSR0
Data Set Ready 0
P3
RXD0
Data Receive 0
P4
TXD1
Data Transmit 1
P5
RXD1
Data Receive 1
P6
DTR1
Data Terminal Ready
P7
Hard Reset
Hard reset the unit
P8
GND
Ground
To reset the device, short P7 (Hard Reset) to P8 (GND) for less than 1 second and the system will
reset. If P7 (Hard Reset) is shorted to P8 (GND) for over 5 seconds, the SGT-LD-5-23 LD will be
reset to the factory default settings.