LAC Ht40B, User Manual, Page: 23 / 30

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9 Installation
The controller is designed to be mounted to the panel cutout. Slide the controller into the cutout and fix it with 2 flanges that are
supplied with the controller. The installation requires the access to the back of the panel.
Mounting dimmensions
•
Width x height x overall length: 48 x 96 x 121 mm (including terminal board).
•
Behind panel length: 114 mm ((including terminal board).
•
Cutout in the panel: 44 x 91 mm.
•
The thickness of panel: 1,5 to 10 mm.
Mounting
•
Make the panel cutout 44 x 91 mm.
• Slide the controller into the panel cutout.
•
Insert the flanges for holding into the holes upward and downward or on both sides of the controller.
•
Tighten the screws firmly on the flanges.
The controller is now installed, before wiring we recommend to read thoroughly the chapter on the possible sources of
interference and principals for installation.
Wiring of the controller begins on page
24 .
9.1 Principals for installation, the sources of interference
There are many possible sources of interference in environment of the controller. Among the most harmful sources of
interference are the following:
•
Equipment with inductive load, e.g. electromotors, winding of relays and breakers, … .
•
Thyristors and other semiconductor equipment
•
Welding devices.
•
Wires carrying high currents.
•
Fluorescent lightings and neon lights.
9.2 Reduction of influence of interference
Making a design of system, try to observe these guidelines:
•
All wires of power supply voltage and power wires carrying high currents must be lead separately from signal leads (e.g.
thermocouple lead wire, communication lines). Minimum distance between these types of wires should not be smaller than
30 cm.
•
If signal and power wires cross each other it is suitable for them to be crossed in right angle.
•
From the beginning try to find the possible sources of interference and keep the wires away from them.
•
Do not install relays and breakers very close to the controller.
•
Do not use supply voltage for the controller also for supplying inductive and phase angle control equipment.
•
Twisted and shielded wires should be used for signal leads. Shielding should be earthed several times.
When necessary the uninterruptible power sources (UPS) could be used.