Airwell CW-AR, Руководство по установке и обслуживанию

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Note : When MODBUS supervision is used, all the units must have a unique address (see "Addressing procedure").
13.9. MODBUS
The MODBUS supervision can be connected to a maximum of 123 appliances.
² The maximum distance between the RCL and the first unit is 30 metres.
² The maximum distance between the RCL and the furthest unit is 100 metres.
1 2 3 4
MODBUS
RS 485
30m MAXI
RCL
4 3 2 1
1 2 4 3
RS 485
12V GND
CARTE
STORM 2
A- B+
- +
CW-AR 1
1 2 4 3
RS 485
12V GND
CARTE
STORM 2
A- B+
CW-AR 2
1 2 4 3
RS 485
12V GND
CARTE
STORM 2
A- B+
CW-AR 3
100m MAXI
RCL
123 CW-AR
MAXIMUM
The use of the µBMS recall command is not compatible with the modbus communication.
The same terminals and addressing DIPs are used in both connection cases.
Shielded twisted pair wire must be used for interconnecting wiring. Wire impedance must be between
100 and 130 Ohms and the wire surface section must be between 0.12 and 0.5 mm² (26 to 20 AWG).
Larger wire may be used, but in this case connection to the terminal blocks can cause problems.