37
C35-FC
16.3. Maximum number of devices on data bus
The C35-FC--B/RS is categorized as BACnet MS/TP Master Device. The maximum
number of Master Devices supported by BACnet MS/TP on one data bus segment is 128.
However, it is recommended that no more than 50 devices are connected to one data
bus segment. A BACnet router device should be used for projects where more data bus
segments need to be connected, as shown below.
16.4. Isolated RS485
Devices with RS-485 and with galvanic isolation are marked with suffix /RS-G. Galvanic
isolation is required where there is no guarantee that the potentials at the earth grounds
of different nodes in the system are within the common-mode range of the receiver.
The benefits of galvanic isolation extend beyond safety and protection from dangerous
voltages. They also provide error-free communication in the presence of high edge-rate
transients, plus noise and high common mode voltage that would otherwise render a
non-isolated network inoperative.
17. Technical data C35
Power supply
Nominal voltage
AC 24 V ± 15 %
DC 17…39 V
Consumption
1.5 W
Analog Inputs
Resistive input (PT1000)
803 … 1480 Ω (-50 … 125 °C)
Resolution
0.385 Ω (0.1 °C)
Accuracy
± 1.54 Ω (± 0.5 °C)
Binary Input
Voltage free contact
Selectable (NO/NC)
Analog Outputs
Voltage outputs
0 - 10 V DC (1 mA)
Resolution
10 mV
Accuracy
± 0.9 % (full scale)