GESTRA NRR 2-52, 2-53, URB 50

 NRR 2-52, NRR 2-53

Supply voltage

24 VDC +/– 20%

Fuse

external 0.5 A (semi-delay)

Power consumption

5 VA

Connection of level electrode / level transmitter (switch-selectable)

1 input for level electrode NRG 21-.. or NRG 26-21, with 3 poles and screen or

1 analogue input 4-20 mA, e. g. for level transmitter NRGT 26-1, with 2 poles and screen

Supply voltage of level electrode

12 VDC

Input/output

Interface for data exchange with operating & display unit URB 50

Inputs

1 analogue input potentiometer 0 – 1000 Ω, two-wire connection (indication of valve position, only NRR 2-52)

1 analogue input 4-20 mA (steam flowrate) (optional)

1 analogue input 4-20 mA (feedwater flowrate) (optional)

Outputs

NRR 2-52: 2 volt-free change-over contacts,

8 A 250 V AC / 30 V DC cos j = 1 (control valve). 2 volt-free change-over contacts,

8 A 250 V AC / 30 V DC cos j = 1,

De-energizing delay: 3 seconds (MIN/MAX alarm).

NRR 2-53: 4 volt-free change-over contacts, 8 A 250 V AC / 30 V DC cos j = 1,

De-energizing delay: 3 seconds (MIN 1, MIN 2 / MAX 1, MAX 2 alarm)

1 analogue output 4-20 mA, max. load 500 ohm (manipulated variable Y).

Provide inductive loads with RC combinations according to manufacturer’s specification to ensure interference suppression

NRR 2-52, NRR 2-53: 1 analogue output 4-20 mA, max. load 500 ohm (e. g. for actual value indication) (optional)

Indicators and adjustors

1 tri-colour LED indicator (start-up = amber, power ON = green, malfunction = red) 1 code switch with four poles for configuration

Housing

Housing material: base: polycarbonate, black; front: polycarbonate, grey Conductor size: 1 x 4,0 mm² solid per wire or

• x 5 mm2per stranded wire with sleeve to DIN 46228 or
• x 5 mm2per stranded wire with sleeve to DIN 46228 (min. Æ 0.1 mm) terminal strips can be detached separately

Fixing of housing: Mounting clip on supporting rail TH 35, EN 60715

Electrical safety

Pollution degree 2 for installation in control cabinet with protection IP 54, completely insulated

Protection

Housing: IP 40 to EN 60529 Terminal strip: IP 20 to EN 60529

Weight

approx. 0.5 kg

Ambient temperature

when system is switched on: 0° … 55 °C, during operation: –10 … 55°C,

Transport temperature

–20 … +80 °C (<100 hours), defrosting time of the de-energized equipment before it can be put into operation: 24 hours. Storage temperature

–20 … +70 °C, defrosting time of the de-energized equipment before it can be put into operation: 24 hours.

Relative humidity

max. 95%, no moisture condensation

Approvals:

TÜV certificate                                  VdTÜV Bulletin “Water Lever 100” (= Water Level 100): Requirements made on water level limiting & control equipment.

Type approval no. TÜV · WR · XX-427 (see name plate).

UL/cUL (CSA) Approval                           UL 508 and CSA C22.2 No. 14-13, Standards for Industrial

Control Equipment. File E243189.

URB 50

Supply voltage

24 VDC +/– 20%

Fuse

internal automatic

Power consumption

8 VA

Input / output

Interface for data exchange.

User interface

Analogue resistive touch screen, resolution 480 x 271 pixels, illuminated.

Dimensions

Front panel: 147×107 mm Panel cut-out: 136×96 mm Depth: 56 + 4 mm

Electrical connection

1 connector with 3 poles,

D-SUB connector with 9 poles.

Protection

Front panel: IP 65 to EN 60529 Back: IP 20 to EN 60529

Weight

approx. 1.0 kg

Ambient temperature

when system is switched on: 0 ° … 55 °C, during operation: –10 … 55 °C

Transport temperature

–20 … +80 °C (<100 hours), defrosting time of the de-energized equipment before it can be put into operation: 24 hours. Storage temperature

–20 … +70 °C, defrosting time of the de-energized equipment before it can be put into operation: 24 hours.

Relative humidity

5 – 85 %, no moisture condensation

Scope of supply

NRR 2-52

1 Level controller NRR 2-52

1 Installation manual

NRR 2-53

1 Level controller NRR 2-53

1 Installation manual

URB 50

1 Operating & display unit URB 50 1 Data line L = 5 m