IM-P408-04
EMM Issue 7
10
B850-W and B850-P Boiler House Energy Monitor
I
type (0 / 4-20 mA current loop analog inputs)
Transmitters supply
24 Vdc +10% / -20%; max 22 mA per channel
(protected with PTC 50 mA fuse and 100 Ω resistor in
series)
Maximum input voltage
± 40 Vdc/SELV
RTD type (3 analog inputs for temperature sensors)
Max input voltage
± 40 Vdc/SELV
PULS type inputs (binary / pulse / frequency)
Maximum input voltage
± 40 Vdc/ SELV
4-20 mA analog outputs
Maximum loop power supply voltage
28 Vdc/SELV
Binary outputs (B850-W-2 and B850-W-2-UL)
Number of outputs
4
Type of outputs
3 pole (COM, NO, NC) electromechanical relay
Contact rating (resistive load)
3 A at 85 .. 250 Vac / 30 Vdc
Maximum switching voltage
250 Vac / 125 Vdc
Maximum switching power
750 VA / 90 W
Over voltage category
CAT III
Binary outputs (B850-P-2)
Number of outputs
4
Type of outputs
2 pole Solid State Relay
Contact rating (resistive load)
0.1 A at 24 Vac/dc (max 42 Vac or 60 Vdc) /SELV
Maximum ON resistance
20 Ω
Galvanic isolation (optoisolation)
250 Vac continuous; 1 500 Vac for 1 minute
RS-485 / 422
Maximum bus terminal voltages
-8 V … +13 V/SELV
Ethernet port
Connection type
RJ-45/SELV
7. Technical information
B850-W and B850-P