Sentera Controls FCMFFB-R, Mounting And Operating Instructions

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MIW-FCMFXB-R-EN-000 - 19 / 02 / 2021 9 - 10
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FCMFXB-R
INTELLIGENT CO
2
SENSOR WITH
BUZZER
OPERATING INSTRUCTIONS
ATTENTION
The unit is supplied with electrical energy at voltages high enough to inflict
personal injury or threat to health.
Calibration procedure:
Sensor calibration is not necessary. All sensor elements are calibrated and tested in
our factory.
In the unlikely event of CO
2
sensor element failure, this component can be replaced.
Bootloader
Thanks to the bootloader functionality, the unit 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. One “Boot mode” is activated, the firmware
can be updated via SM Boot application (part of 3SModbius software suite) or
Sensistant.
NOTE
Make sure the power supply does not get interrupted during “bootload” procedure,
otherwise you risk losing unsaved data.
LED indications and audible alarm module:
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
). In this
case the audible alarm is OFF.
2.
When the yellow LED is on, the measured value (temperature, relative humidity
or CO
2
) is in the alert range (
Fig. 6 - 2
). In this case the audible alarm is ON.
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. In this case the audible alarm is OFF. Blinking red LED indicates loss of
communication with the sensor (
Fig. 6 - 3
).
NOTE
The audible alarm output can be set via Holding register 78. By writing 0 in Holding
register 78, the audible alarm will be disabled. By default, the audible alarm
function is set to “continuous”. By writing 2 in Holding resister 78, the audible
alarm will change to “pulsed”.
Fig. 6 LED indications
3
2
1
NOTE By default, the LED indication refers to CO
2
measurements. This can be changed to
temperature or relative humidity values via Modbus Holding Register 79 (see Table
Holding registers below).
NOTE
The intensity of the green LED can be adjusted between 0 and 100 % with step of
10 % according to the value set in Holding register 80.