Boiler house

TDS blowdown controls

2.4.29

Technical data BC3250 (continued)

0/4-20 mA output(s)

cable/wire

RS485 communication

cable / wire

Type

Shield type

Number of pairs

Gauge

Maximum length

Recommended type

Type

Shield type

Number of pairs

Gauge

Maximum length

Recommended type

Twisted pair

Screened

1

0.23 - 1 mm2 (24 - 18 AWG)

100 m (328 ft)

various

EIA RS485 twisted pair

Screened

2 or 3

0.23 mm2 (24 AWG)

1200 m (4000 ft)

Alpha Wire 6413 or 6414

LAN Cat 5 or Cat 5E ScTP (screened), FTP (foil) or STP (shielded) cable can be used, but limited to 600 m.

Water

conductivity

Input

technical

data

Probe types

Ranges

Accuracy

pH factor

Neutralising factor

Resolution

Drive:

Sensor type

Range

Accuracy

Resolution

Drive:

Input voltage range

Maximum current input

CP10, CP30 and CP32

Minimum ≥1 μS @ 25 °C

0 – 9.99 ppm or μS/cm

0 – 99.9 ppm or μS/cm

0 – 999 ppm or μS/cm

0 – 9990 ppm or μS/cm

±2.5% FSD (Poss > if high EMC)

0.50 – 1.00 (0.7 default)

0.7

0.1% FSD

ac – 4 wires

Pt100 – Class B or better

0 - 250 °C

(With Pt100 not fitted – user programmed temperature 100 - 250 °C,

1 °C steps)

±2.5% FSD – system accuracy ±5%

1% FSD

dc–3wires

110 – 240 Vac

2 mA maximum

Temperature

compensation

(TC)

Burner input

Page 4 of 6

TI-P403-90 AB Issue 6

BC3250 Blowdown Controller