User interface, front panel

Display type

LCD TFT color, 3.5", with LED backlight

Display size / resolution

43.8 mm x 77.4 mm / 272(RGB) x 480 px,

LED indication 3 two-color LEDs, red / green: ALARM, REC, USB

Keyboard 19 membrane buttons

Inputs organization

Number of inputs

6 x I type (0/4-20 mA): IN1, IN2, IN3, IN4, IN5, IN6

3 x RTD (4-wire): IN7, IN8, IN9

3 x PULS: IN10, IN11, IN12

I type (0 / 4-20 mA current loop analog inputs)

Signal type

0-20 mA or 4-20 mA

Transmitter connection

2-wire passive transmitter (supplied from B850) or active

transmitter (current source transmitter)

Input resistance

95 W ± 10% (protected with PTC 50 mA fuse in series)

Transmitters supply

24 Vdc +10% / -20%; max 22 mA per channel (protected with

PTC 50 mA fuse and 100 Ω resistor in series)

A / C converter resolution

18 bit (24 bit Sigma-Delta ADC)

50 Hz / 60 Hz filter Sinc3 digital filter

Damping (1

st

order Low Pass Software Filter time constant) 2 s / 5 s / 10 s / 20 s / 30 s / 1 min / 2 min / 3 min / 5 min

Measurement resolution

> 0.01% of FS

Accuracy (at T

amb

= +25 °C / +77 °F) ±0.1% of FS (typical W0.05% of FS)

Temperature drift

Maximum ±0.02% of FS / °C

Maximum input voltage

±40 Vdc / SELV

Galvanic isolation between inputs No; common potential of functional GND for all inputs

Galvanic isolation to Analog Outputs, RS-485 / RS-422, Ethernet

250 Vac continuous; 1500 Vac for 1 minute

RTD type (3 analog inputs for temperature sensors)

Sensor types

Pt-100 x K; Ni-100 x K; where K = 1..11

(K – multiplier, e.g.: K = 2 for Pt-200)

Measuring range

-200..+850 °C /-328..+1562°FforPt100xK

-60..+150 °C / -76..+302°FforNi100xK

Sensor connection

4-wire (2-wire with wire bridges)

Wire resistance compensation Automatic , additional manual in range -99.99 .. +99.99 W

M aximum resistance of connecting wires 50 W

A / C converter resolution

18 bit (24 bit Sigma-Delta ADC)

50 Hz / 60 Hz filter

Sinc3 digital filter

Damping (1

st

order Low Pass Filter time constant) 2 s / 5 s / 10 s / 20 s / 30 s / 1 min / 2 min / 3 min / 5min

Measurement resolution

> 0.05% of reading or 0.1 Ω (TBV)

Accuracy (at T

amb

= +25 °C / +77 °F) ±0.5 °C / ±0.9 °F (typical ±0.3 °C / ±0.54 °F)

Temperature drift

Maximum ±0.02 °C / °C / 0.036 °F / °F

Max input voltage

±40 Vdc / SELV

Galvanic isolation between inputs

No; common potential of functional GND for all inputs

Galvanic isolation to Analog Outputs, RS-485 / RS-422, Ethernet

250 Vac continuous; 1500 Vac for 1 minute

2.12.5

Boiler house

Energy monitor

Technical data for the B850 series flow computers

Page 4 of 8

TI-P408-01 EMM Issue 5

B850 Boiler House Energy Monitor