Bộ điều khiển mức nước Gestra NRR 2-61 (NRR 2-60)

Technical data

Supply voltage

■ 24 V DC +/-20 %

Power consumption

■ max. 5 VA

Current input

■ max. 0.3 A

Required external fuse

■ 0.5 A M

Input/output

■ Interface for CAN bus to ISO 11898, CANopen, insulated

Inputs NRR 2-61

■ 1 x analogue input IN 2, 4 – 20 mA (feedwater owrate) – (option)

■ 1 x analogue input IN 3, 4 – 20 mA (steam owrate) – (option)

Outputs of MIN/MAX contacts/pump enable

■ 4 x volt-free relay contacts (changeover relays), contact material AgNi0.15, AgSnO2

Con gurable as:

◆ 2 x MIN/2 x MAX water level alarm.Alternatively:

◆ 1 x MIN/1 x MAX water level alarm.
◆ 2 x pump enable (ON/OFF) with actuation of a

frequency-controlled pump

■ Maximum switching current – 8 A at 250 V AC/ 30 V DC – cos φ = 1

Inductive loads must have interference suppression (RC combination) as per the manufacturer’s speci cation

Switch-off delay of MIN/MAX output relays

■ Factory default setting 3 seconds

Analogue output

■ 1 x actual value output OUT 1: 4 – 20 mA, e.g. for an actual value display

■ 1 x analogue output OUT 2: 4 – 20 mA, control point Yw■ Max. load resistance 500 W
Indicators and controls
■ 1 x multicolour LED (orange, green, red)

◆ orange = power up◆ green = running◆ red = malfunction

■ 1 x 4-pole code switch for setting the controller group and baud rate

Protection class

■ II double insulated