www.sentera.eu
MIW-RMFPM-2R-EN-000 - 28 / 05 / 2019
7 - 11
Example 1
Example 2
RX
ТX
NBT
NBT
NBT
Slave 2
Master
Slave n
Slave 1
Slave 2
Slave 1
RX
ТX
NBT
NBT
Master
Slave n
NOTE
On a Modbus RTU network, two bus terminators (NBTs) need to be activated.
ATTENTION
t
Do not expose to direct sunlight!
OPERATING INSTRUCTIONS
Calibration procedure:
Sensor calibration is not necessary.
In the unlikely event of CO
2
sensor element failure, this component can be replaced.
All sensor elements are calibrated and tested in our factory.
Bootloader
Thanks to the bootloader functionality, the sensor firmware can be updated via
Modbus RTU communication. To enter ‘Boot mode”, put a jumper onto pins 3 and
4 of the P1 header and restart the power supply (see
Fig. 5
). Once ‘Boot mode’ is
activated, the firmware can be updated via SM Boot application (part of 3SModbus
software suite) or Sensistant.
Fig. 5 P1 header
1 2 3 4 5
Put a jumper onto pins 1 and 2 and wait
for at least 5 seconds to reset the Modbus
communication parameters
1 2 3 4 5
Put a jumper onto pins 3 and 4 and restart
the supply to enter bootloader mode
LED indications
1.
When the green LED is on, the measured value (temperature, relative humidity or
CO
2
) is between the minimum and maximum alert range values (
Fig. 6 - 1
).
2.
When the yellow LED is on, the measured value (temperature, relative humidity
or CO
2
) is in the alert range (
Fig. 6 - 2
).
3.
When the red LED is on, the measured value (temperature, relative humidity or
CO
2
) is below the minimum measurement range value or above the maximum
value. Blinking red LED indicates loss of communication with a sensor (
Fig. 6 - 3
).
RMFPM-2R
MULTIFUNCTIONAL ROOM
CONTROLLER
