Specification; Cleaning And Care; Installation; Electrical Connections - Bosch Junkers MB LAN Notice D'installation

2.2

Specification

Specifications
Dimensions (W × H × D)
Rated voltages:
• BUS system
• CAN BUS system
• Module power supply
Interfaces
Power consumption
Permissible ambient
temperature
Protection class
Table 8
2.3

Cleaning and care

▶ If required, wipe the enclosure with a damp cloth. Never use
chemically aggressive or acidic cleaning agents.
3

Installation

3.1 Installation
▶ Remove cover ( Fig. 3, page 62).
▶ Mount the module ( Fig. 4, page 62).
▶ Secure the module ( Fig. 5, page 62).
3.2

Electrical connections

Connections and interfaces
Legend to Fig. 6 and 7, page 63:
7,5 V DC Power supply unit connection
CAN 1 Ground (GND)
CAN 2 CAN Low
CAN 3 CAN High
HT 2-wire BUS system connection
LAN LAN connection (RJ45)
RESET RESET button
TSW Switch for CAN connection
Pre-assembling the ferrules and connecting the cable
▶ Open the grommets to match the cable diameter and cut in on one
side ( Fig. 8, page 63).
▶ Fit the ferrules and connect the cables (2-wire BUS:  Fig. 9,
page 63; CAN:  Fig. 10, page 63).
3.3

Connecting the BUS connections

If the maximum total length of the BUS connections
between all subscribers in a BUS system is exceeded,
the system cannot be commissioned.
If a ring structure is present in the 2-wire BUS system,
the system cannot be commissioned.
MB LAN – 6 720 805 489 (2013/01)
151 × 184 × 61 mm (further
dimensions  Fig. 2, page 62)
• 12 V to 15 V DC (reverse polarity
protected)
• 0V to 5V
• Plug power supply unit supplied
230 V AC/7.5 V DC, 700 mA
• 2-wire BUS
• CAN
• LAN: 10/100 MBit/s (RJ45)
1.5 VA
0 ... 50 °C
IP20
Maximum total length of the BUS connection between all subscribers
of the corresponding BUS system:
• 2-wire BUS:
2
– 80 m at max. 0.40 mm conductor cross-section
2
– 100 m at max. 0.50 mm
2
– 150 m at max. 0.75 mm
2
– 200 m at max. 1.00 mm
2
– 300 m at max. 1.50 mm
• CAN:
– 30 m (shielded, twisted wires)
Suitable cables for the corresponding BUS system:
• 2-wire BUS: e.g. LiYCY 2 x 0.75 (TP)
2
• CAN: 2 × 2 × 0.3 mm ; shielded, twisted wires
▶ All LV leads must be routed separately from cables carrying mains
voltage to avoid inductive interference (minimum separation
100 mm).
Connecting the 2-wire BUS system to the module
▶ Connect BUS subscribers with two BUS connectors in series
( Fig. 6, page 63) or BUS subscriber [B] with one junction box [A]
in a star configuration ( Fig. 11, page 63).
▶ In case of external inductive interference, shield the cables.
This ensures that the cables are shielded from external interference
(e.g. heavy current cables, overhead wires, transformer stations,
radio and television set, amateur radio stations, microwave ovens
etc).
Connecting the CAN BUS system to the module
Verify the correct position of the two CAN connection
switches to ensure that the CAN system is correctly
connected ( Fig. 7, page 63).
▶ If the module is an end point, both switches must be
set to ON.
▶ If the module is connected to a branch line, both
switches must be set to OFF.
▶ Connect the shielding of the CAN cable in the module to CAN 1
(earth).
▶ Connect one wire of the twisted wire pair in the module to CAN 2 (CAN
Low).
▶ Connect the second wire (of the twisted wire pair used for CAN 2)
inside the module to CAN 3 (CAN High) ( Fig. 7, page 63).
Make CAN connection to heat pump.
▶ Find free CAN connections in the heat pump.
▶ If no free connection is available in the heat pump, the CAN cable must
be connected sharing the connection with another accessory.
NOTICE: Make sure not to confuse 12V and CAN
connection!
If 12 V is connected to the CAN, the processors will be
destroyed.
▶ Verify that the three wires are correctly connected to
the terminals correspondingly identified on the PCB.
▶ Connect the shielding (earthing) of the cable to the earth connection
of the heat pump.
▶ Connect the wire connected to CAN 2 (CAN Low) in the module to
CANL (CAN Low) in the heat pump.
▶ Connect the wire connected to CAN 3 (CAN High) in the module to
CANH (CAN High) in the heat pump ( Fig. 12, page 64).
▶ Make sure that the CAN system is connected correctly.
Installation
conductor cross-section
conductor cross-section
conductor cross-section
conductor cross-section
11