LoRa Node
19
Connect to Modbus RTU devices via RS-485 :
The IOT400 provides 1 RS-485 port and can support up to 3 cascaded Modbus RTU devices. Since the IOT400
can not detect what kind of device is connected to, not only hardware configuration (
CON2
) is required, but
also software configuration is mandatory.
Pinout Definition @ CON2
Pin1
Pin2
Pin3
Pin4
Pin5
Pin6
Pin7
Pin8
GND
VDC
(5-12V)
VDC
(5-12V)
GND
RS-485
D- (A)
RS-485
D+ (B)
WakeUp-
Connect to external magnetic switch via WakeUp port :
Most of the time, the IOT400 data logger operates under sleep mode with ultra low power consumption
design. At that time, no one can wake it up till the schedule time out.
If you still have to wake it up for some unexpected reason, for example, to change software configuration or
upgrade new firmware, there is a manually wake-up mechanism for such kind of maintenance situation.
There is an internal magnetic Reed Switch, located at the lower-left corner of the IOT400. You can just take a
small magnet and touch the lower-left corner of the enclosure, the IOT400 will detect it and get into WakeUp
state.
However, it IOT400 is installed at a hard to reach location or enclosed in a metallic cabinet, there is an
alternative option for you to easily wake up the IOT400. In such case, you can connect an external magnetic
switch or some kind of switch and connect it to the WakeUp pins. Once the input status change
(OPEN
CLOSE), the IOT400 will detect it and get into WakeUp state accordingly.
Pinout Definition @ CON2
Pin1
Pin2
Pin3
Pin4
Pin5
Pin6
Pin7
Pin8
GND
VDC
(5-12V)
VDC
(5-12V)
GND
RS485
D- (A)
RS485
D+ (B)
WakeUp-