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Product description, Assembly, Installation and operation
3.4
Operating conditions
The differential pressure sensor may only be operated under the following operating conditions:
EN
Operating condition
Temperature operational range:
Humidity operational range:
Degree of protection:
4
Assembly
4.1
Assembly instructions
The assembly of the differential pressure sensor is made as shown in fig. 2, fig. 3, fig. 4 or fig. 5.
5
Installation and operation
5.1
Operating and display elements
The operating and display elements are shown in fig. 6.
Key for fig. 6
1
Connection 1 for air hose
2
Connection 2 for air hose
3
Multi-LED for the status display
4
CAN bus connection, 24 V
5
CAN bus connection, 24 V
5.2
Installation
Connect the air hose to the appropriate connection of the differential pressure sensor and lay the air
hose to the measuring point (fig. 6, item 1, 2).
Connect the differential pressure sensor with a CAN bus connection cable to the CMC III PU or to
the neighbouring elements on the CAN bus (fig. 6, item 4, 5).
Display of the status change:
– The two green and the two red CAN bus LEDs on the CAN bus connection flash.
– The multi-LED of the Processing Unit flashes continually in the green – orange – red sequence.
– The multi-LED of the differential pressure sensor flashes blue continuously.
Press the "C" key on the CMC III PU (a first audio signal is issued) and keep it pressed for approx.
3 seconds until a second audio signal is issued.
Display of the status change on the CAN bus LEDs:
– Green LEDs light continuously: CAN bus status "OK".
– Red LEDs light continuously: CAN bus status faulty.
Display of the status change on the multi-LED of the Processing Unit:
– Continuous green light: All units attached to the CAN bus have the "OK" status.
– Continuous orange light: At least one unit attached to the CAN bus has the "warning" status.
– Continuous red light: At least one unit attached to the CAN bus has the "alarm" status.
Display of the status change on the multi-LED of the differential pressure sensor:
– Continuous blue flashing: Communication over the CAN bus.
– Green flashing: When the measured value changes or, at the latest, every 5 seconds.
– Continuous orange flashing: The differential pressure sensor has the "warning" status. Fast flash-
ing: Upper limit value exceeded. Slow flashing: Lower limit value exceeded.
8
CMC III Analogue Differential Pressure Sensor
0 °C to +55 °C
5% to 95% relative humidity, non-condensing
IP 30 in accordance with EN 60 529
Rittal CMC III Analogue Differential Pressure Sensor
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