DLY (DELUXE) SERIES HYDRONIC CASSETTE
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BMS - HOST COMPUTER NET WORK (OPTIONAL)
A number of master units can be grouped together via data logger [router] to form a bigger network [1 up to 64 data
loggers]. The maximum network size is 64 data loggers x 32 fan coils = 2048 fan coils connected to a computer
based control system. Host computer can monitor and control every single unit; on/off, mode, set temperature,
swing, sleep and fan speed and 365 days timer on/off program.
1. NETWORK TOPOLOGY OVERVIEW
“S” stand for the wiring distance between the first data logger to the last data logger (Data Logger Bus)
“T” stand for the wiring distance between the first fan coil to the last fan coil (Fan Coil Bus)
Table below shows the jumper shorting position on JP2 (Data Logger) and S7 (PCB) under different distance
situation to the bus connection.
RS232 to RS485 converter with 120ohm
termination resistor in built
RS232 to RS485 converter without
120ohm termination resistor in built
Data Logger Bus “S” < 300m
Short JP2 position 2, 3 on Data Logger Short JP2 position 1, 2 on Data Logger
Data Logger Bus “S” >= 300m
Short JP2 position 1, 2 on Data Logger Short JP2 position 1, 2 on Data Logger
Fan Coil Bus “T” < 150m
Do not short S7 on PCB
Short S7 on PCB
Fan Coil Bus “T” >= 150m
Short S7 on PCB
Short S7 on PCB
Table 1
Note: the above wiring distance of 300m is just for the reference. Short position 1 &2 or 2 & 3 for the last data
logger and S7 on PCB depends on the actual installation and quality of connection.
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