EN
30
Connection with the
Master
inside the network
When making the electrical connections in a network of fan coils communicating via a
serial line, extreme care must be paid to some important details:
1 - Type of the cable used:
BELDEN 9841, RS-485, 1x2x24 AWG SFTP, 120 Ohm
2 - The overall length of the network must not exceed 700/800 metres
3 - A maximum of 20 fan coil units can be connected
- the cables shall be tightened to a force of less than 12 kg. Higher forces may fray the
wires and reduce the transmission properties;
- do not twist, knot, crush or fray the wires;
- do not lay the signal cables and power cables together;
- if the signal cable needs to cross a power cable, make sure the intersection is at 90°;
- do not join sections of cable. Always use one single cable to connect the units together;
- do not excessively tighten the wires under the connection terminals. Strip the end of the
cable with care. Do not crush the cable at the cable glands or safety supports;
- always observe the positions of the colours corresponding to the start and end
of the connections;
- once having completed the wiring, visually and physically check that the cables are in
good condition and correctly positioned;
- install the cables and the unit in such as way as to minimise the possibility of accidental
contact with other power cables or potentially dangerous cables, such as the cables for
the lighting system;
OPERATING INSTRUCTIONS FOR CONNECTION VIA AN RS485
INSTALLATION NOTES
CFP-ECM
CFP-ECM
CFP-ECM
Slave
Slave
Slave
Master
Jumper
MC2
Slave
Jumper
MC2
M
Fan
+
°C
AUTO
SET
T-MB
CFP-ECM
Jumper
MC2
D+ D-
GND
D+ D-
D+ D-
GND
GND
D+ D-
GND
D+ D-
GND
DIP 2 OFF
DIP 2 ON
DIP 2 ON
DIP 2 ON
CFP-ECM
DIP 2 ON
Jumper
MC2
Jumper
MC2
