Installation; Mounting The Instrument; Electrical Connections - Carel FCM series Manual

4

Installation

4.1

Mounting the instrument

1)
Connect probes and power: probes can be placed up to 100 m distant from the controller provided that you use 1mm² cross-section,
possibly shielded, cables to increase immunity against noises.
2) Program the control following the instructions in the "Programming" section.
3) Connect the actuators: the actuators should only be connected after having programmed the control.
Note: the maximum load values for inputs and outputs should be respected, as indicated in the "Technical specifications"
section. As far as the actuator connected to the 0
probes on distances and precautions should be followed.
4)
Serial network connection: if connection to a supervisory or pLAN network is required, the optional serial interface boards (cod.
FCSER00000), should be inserted in the control. Before performing this operation, make sure power has been disconnected, and then
follow the instructions enclosed with the interface board. It is necessary to take care of the system grounding. Especially, the
secondary of the control supply power transformers must not be connected to earth. If it may be necessary to connect a transformer to
a secondary on earth, an insulating transformer must be interposed. It is possible to connect more instruments to the same insulating
transformer keeping the same correspondence between the "G" and the "G0"of the various instruments; however it is advisable to use
a single insulating transformer for each instrument.
Before carrying out the operation, make sure that the power supply has been removed, then follow the instructions enclosed to
the Serial board.
4.2

Electrical connections

Before performing any electrical connections, the instructions and drawings on the following pages must be carefully observed.
Furthermore, the unit must be used complete with all required electromechanical safety devices in order to guarantee total safety for the
operator.
WARNING:
Avoid installing the controls in environments which present the following characteristics:
1. Non-condensing relative humidity above 90%;
2. Strong vibrations or shocks;
3. Exposure to jets of water;
4. Exposure to aggressive and polluting agents (e.g.: sulphide and ammonia gases, salty fog, fumes) to prevent corrosion and/or
oxidation;
5. High-levels of magnetic and/or radio-frequency interference (avoid installing the instrument near transmitting antennae);
6. Exposure to direct sunlight and atmospheric agents in general.
When connecting the control follow these INSTRUCTIONS carefully:
1.
Incorrect connection of the power supply may seriously damage the system.
2.
Use cable ends suitable for the terminals. Loosen each of the screws and insert the cable end, then tighten the screws. On completing
this operation lightly tug the cables to check they are solidly inserted. Do not use automatic screw drivers to tighten the screws; if
necessary, tighten them with a torque less than 50 N cm.
3.
Separate as much as possible (at least 3 cm), the probe signal cables, the 0
inductive load and power cables, in order to avoid electromagnetic interference;
4.
Never place power cables, probe cables, 0
electrical panel channel).
5.
Make sure that probe cables, 0
devices (contactors, thermo-magnetic switches, etc.).
6.
Use the shortest possible route for the probe cables and make sure that they do not surround the power devices.
7.
Please remember that thermistor temperature probes (NTC) do not have polarity, and so the ends can be connected in any order.
8.
The probes can be positioned up to a maximum of 100 m from the control. To extend the length of the cables use cables with a
minimum cross-section of 1mm², shielded if possible. In this case the shield should be connected to the GND of the probe inputs; do not
earth or connect the other end (that is the sensor end) of the shield to other references.
9.
Avoid powering the control from the general panel power supply if other devices such as contactors, solenoid valves, etc. are also
connected.
FCM electronic regulator
÷
10 V output is concerned, the same indications listed below regarding the
÷
10 V output cables and digital input cables in the same cable channel (including the
÷
10 V output cables and digital input cables are not installed in the immediate vicinity of the power
÷
10 V output cables and the digital input cables, from the
4 Cod. +302235300 - Rel. 2.0 del 30/11/98