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 of the NRR 2-60
■ 1 x analogue input for potentiometer 0 – 1000 W, two-wire connection (indication of valve position)
■ 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
■ 2 x volt-free relay contacts (changeover relays), contact material AgNi0.15, AgSnO2
■ 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.
Outputs of control valve OPEN/CLOSED
■ 2 x volt-free relay contacts (changeover relays), contact material AgNi0.15, AgSnO2
■ 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
Analogue output
■ 1 x actual value output 4 – 20 mA, e.g. for actual value indication
■ Max. load resistance 500 WIndicators 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
IP rating to EN 60529
■ Housing: IP 40
■ Terminal strip: IP 20
Electrical safety
■ Degree of contamination 2 for installation in control cabinet with protection rating IP 54, fully insulated
Admissible ambient conditions
■ Service temperature: – 10 °C – 55 °C(0 °C – 55 °C at power-on)
■ Storage temperature:■ Transport temperature:
(< 100 hours) *
■ Air humidity: non-condensing
– 20 °C – 70 °C – 20 °C – 80 °C
max. 95 %
* Only switch on after a 24-hour defrosting period
