Boiler house Energy monitor
2
Technical data for the B850 series flow computers (continued)
RS-485/422
ASC II Modbus RTU, BACnet MSTP and GSM
Transmission protocol
Number of nodes in network
256
Maximum line length
1 200 m (depends on quality of data cable and baud rate)
Baud rate
2.4, 4.8, 9.6, 19.2, 38.4, 57.6, 115.2, 230.4 kbps
Parity control
Even, Odd, None
Frame
1 start bit, 8 data bits, parity 1 bit, 1 stop bit
2.12 7
Internal terminating resistor
Yes, activated with DIP switch
Maximum bus terminal voltages
-8 V … +13 V/SELV
Minimal driver differential output voltage
1.5 V (for R L = 54 W )
Minimum receiver sensitivity
200 mV
Short-circuit/thermal protection
Yes
Galvanic isolation to Analog Inputs, Analog Outputs, Ethernet
250 Vac continuous; 1500 Vac for 1 minute
Ethernet port
Transmission protocol
Modbus TCP, ICMP (ping), DHCP server, http server, BACnet IP
Interface
10 BaseT Ethernet
Data buffer
300 B
Number of opened connections (simultaneously)
4
Connection type
RJ-45/SELV
LED indication
2 (build in RJ-45 socket) USB port
Socket type
A type, according to USB standard
Version
USB 2.0
Recording format
FAT16 (within a limited scope) Power supply (B850-W-2 and B850-W-2-UL)
Rated supply voltage
100 - 240 Vac; 50/60 Hz
Supply voltage range
85 .. 264 Vac; 47 .. 63 Hz
Power consumption
Maximum 20 VA
Over voltage category
CAT III
Technical data for the B850 series flow computers continued on next page
TI-P408-01 EMM Issue 6
Page 7 of 11
B850 Boiler House Energy Monitor
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