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1. Outline
This document describes the function and performance of an IT controller for JRN-330K
mini excavator (hereinafter referred to as "the present device").
This device is an IT controller equipped with GPS and 3G cellular communication
function for mini excavators.
2. Features
As an IT controller for mini excavators
· Equipped with GPS function. Position, get current time from GPS.
· Equipped with mobile communication function. SMS reception and mail transmission /
Reception are performed.
· Supply power supply from the battery of the construction machine.
· Even when the power supply is interrupted from the battery of a construction machine,
it is possible to send and receive at least one set of mail within 48 hours.
· Debugging and software update of this device are possible by serial communication with
a personal computer.
3. Equipment configuration
Table 3.1 Components of the IT controller for mini excavators
No.
Item
name
Remarks
Quantity
1
3G Communications Module (WCDMA)
Cinterion PHS8-P(Gemalto product
）
1
2
Built-in
battery
pack NBB-3300
1
3
SIM
card
Customer-provided
1
Construction
machine battery
（
12V/24V
）
12V/24V
GND
Hour meter signal
TX
RX
Power supply circuit
Built-in battery pack
GPS function
Cellular
communication
function
* Computer is used only for debugging, firmware update
(connection)
Control circuit
Hour meter signal
RTC in CPU
(For alarm)
IWDT in CPU
Serial communication
Independent
WDT
(
※
1)
※
1
：
Stand alone WDT is a function in the CPU. WDT that can operate even while sleeping CPU.
3G communication module
Construction machine connecting
cable(*1)
SIM card
Figure 3.1 Configuration diagram
NOTE 1. The power cable requires a fuse (recommended current rating: 2[A]) to protect
against overcurrent. Insert the fuse into the battery line.
base station
satellite
