Boiler house Energy monitor
2
Technical data for the B850 series flow computers (continued)
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
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
2.12 8
Conductor cross Section
Non cULus Version cable entry
4 glands type M20, 2 glands type M16
cULus Version cable entry
4 conduit hubs ½" NPT Wire terminals (B850-P-2)
Wire connection/terminals
Screw type terminal blocks, plug type
Solid 1.5 mm 2 max Stranded 1 mm 2 max Stranded with ferrule 0.25 .. 1.5 mm 2 AWG 30/14 Enclosure (B850-W-2 and B850-W-2-UL)
Conductor cross Section
Enclosure type
Wall mounting, Polycarbonate material
217 mm x 257 mm x 134 mm (without cable glands) 238 mm x 257 mm x 134 mm (with conduit hub cULus version) 247 mm x 257 mm x 134 mm (with cable glands - non cULus version) 290 mm x 300 mm x 165 mm (in cardboard box)
Dimensions (height x width x depth)
Weight net (gross)
approx. 1.7 kg (cULus version 2.5 kg)
Protection class
IP65 (not UL evaluated) Enclosure (B850-P-2)
Enclosure type
Panel mounting, Lexan Resin 920 material
110 mm x 206 mm x 63.5 mm (without terminals) 110 mm x 206 mm x 72 mm (with terminals) 135 mm x 230 mm x 110 mm (in cardboard box)
Dimensions (height x width x depth)
Panel cut-out dimensions
186 mm x 92 mm
Panel thickness
1 .. 5 mm
Weight net (gross)
approx. 0.6 kg (0.7 kg)
Protection class (front/rear)
IP65/IP20 (not UL evaluated)
Technical data for the B850 series flow computers continued on next page
TI-P408-01 EMM Issue 6
Page 8 of 11
B850 Boiler House Energy Monitor
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