Boiler house

Energy monitor

RS-485/422

Transmission protocol

ASCII Modbus RTU, BACnet MSTP and GSM

Number of nodes in network

256

Maximum line length

1200 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

Internal terminating resistor

Yes, activated with DIP switch

Maximum bus terminal voltages

-8 V ... +13 V / SELV

Minimal driver differential output voltage

Minimum receiver sensitivity

1.5V(forR

L

=54W)

200 mV

2.12.7

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

Power supply (B850-P-2)

Rated supply voltage

24 Vdc

(SELV and Limited Energy Supply)

Supply voltage range

18 .. 36 Vdc

Power consumption

Maximum 8 W

Wire terminals (B850-W-2 and B850-W-2-UL)

Wire connection / terminals

Spring type terminal block

Conductor cross Section

Solid 0.2 .. 2.5 mm

2

Stranded 0.2 .. 1.5 mm

2

Stranded with ferrule 0.25 .. 1.5 mm

2

AWG 26 .. 12

Non cULus Version cable entry

4 glands type M20, 2 glands type M16

cULus Version cable entry

4 conduit hubs 1⁄2" NPT

Page 6 of 8

TI-P408-01 EMM Issue 5

B850 Boiler House Energy Monitor