M&C TechGroup LA 1.4 Operator's manual - Manual (Page 14)

14
Gas sampling and conditioning technology 5-5.1.1-ME
13 SUPPLY CONNECTIONS
13.1 ELECTRICAL CONNECTIONS
W A R N I N G !
Incorrect supply voltage may destroy the equipment. Please take
care of the correct voltage as indicated on the type plate!
The supply voltage may vary from the indication on the type plate
by max. ± 10%.
N O T E !
When setting high-power electrical units with nominal voltages of
up to 1000V, attention must be paid to the requirement of IEC 364
(DIN VDE 0100) as well as the associated standards and
stipulations!
The electronic controllers LA-1.1 are equipped with a mains selector switch S3 for 230 / 115 V. At
works, this selector switch is adjusted to 230 V. Check the desired voltage before starting and, if
necessary, change the selector switch by using a screw driver.
The electronic controllers LA-1.4 in 24 V version are suitable for both, constant voltage and alternating
voltage.
When fixing the sensor cable to the installation, take care that the cable is not too short in order to be
able to dismount the sensor without problem for control or cleaning purposes.
N O T E !
Only the sensor types LA 1S and LA 25S provide a line break
control.
N O T E !
The connection cables of the sensors LA 1S and LA 25S are
normal 2-wire lines and can be extended up to 100m via usual
terminals if necessary.
The connection cables of the old sensors LA 1, LA 25 and LA 1-H
are special HF lines that must not be lead and extended via
normal terminals because those terminals interrupt the protective
cover of the line.
13.1.1 ELECTRONIC CONTROLLER LA-1.1
For the electrical connection, the following steps are to be taken (see figure 4):

Loosen the 4 lid screws and remove the lid.

Lead the connection cables through the respective clamp fitting.

The electrical connection of the sensor LA 1S or LA 25S is made according the colours on the
terminals 5 = brown and 6 = white. All sensors of type LA 1, LA 25 and LA 1-H are to be
connected to terminals 5 = brown and 8 = white. In this case, a bridge must be installed
between terminals 6 and 7.