5 Installation
EN
10 Rittal CMC III leak sensor, 15 m
Fig. 10: Sensor with spring clip on the top-hat rail
5.4 Connecting the electronic unit
The CAN bus connection supplies the leak sensor with
the necessary operating voltage. There is no need to
connect a separate power supply unit.
Use a CAN bus connection cable to connect the leak
sensor to a CAN bus interface on the CMC III Process-
ing Unit or the neighbouring component on the CAN
bus (fig. 2, item 2).
The following CAN bus connection cables from the
CMC III accessories range may be used:
– DK 7030.090 (length 0.5 m)
– DK 7030.091 (length 1 m)
– DK 7030.092 (length 1.5 m)
– DK 7030.093 (length 2 m)
– DK 7030.480 (length 3 m)
– DK 7030.490 (length 4 m)
– DK 7030.094 (length 5 m)
– DK 7030.095 (length 10 m)
Fig. 11: Front of the leak sensor
Key
1 Multi-LED for status display
The sensor software is updated, if necessary, following
connection. The status LED of the leak sensor glows
blue throughout and also flashes purple during the entire
update process.
In addition, the status LED of the CMC III Processing
Unit flashes white and a corresponding message ap-
pears on the website.
The sensor update is complete when the following con-
ditions have been fulfilled:
1. The LEDs on the CAN bus connection of the sensor
are green.
2. The multi-LED of the sensor behind the front panel
flashes blue and also green or red, depending on the
status of the sensor.
Further components are connected as a daisy chain.
If necessary, connect another component (e.g. anoth-
er sensor type) to the second, free CAN bus interface
of the leak sensor (fig. 2, item 3).
Status change display:
– The two green and the two red CAN bus LEDs on
the CAN bus connection flash.
– The multi-LED of the Processing Unit flashes contin-
ually in the sequence green – orange – red.
– The multi-LED of the leak sensor flashes blue con-
tinuously.
Press the "C" button on the CMC III Processing Unit
(an initial audio signal will sound) and keep it pressed
for approx. 3 seconds until a second audio signal is
heard.
Status change display on the CAN bus LEDs
– Continuous green LEDs: CAN bus status "OK".
– Continuous red LEDs: CAN bus status defective.
Status change display on the multi-LED of the Pro-
cessing Unit
– Continuous green light: All devices connected to the
CAN bus have the status "OK".
– Continuous orange light: At least one device connect-
ed to the CAN bus has the status "Warning".
– Continuous red light: At least one device connected to
the CAN bus has the status "Alarm".
Status change display on the multi-LED of the leak
sensor
– Continuous blue flashing: Communication via the CAN
bus.
– Green flashing: When the measured value changes, or
at least every 5 seconds.
– Continuous red flashing: The leak sensor has the sta-
tus "Alarm".
– Continuous red light: Invalid measured value.
Note:
No settings can be made as long as the up-
date process is running.
Note:
See section 6.3.1 "Multi-LED displays" for a
list of all of the multi-LED displays.
