Gestra NRR2-52

Level Controller NRR 2-52

Operating & Display Unit
URB 50
Dimensions 147
Supply voltage 24 VDC +/– 20%
107
Technical data Fuse internal automatic
User interface Analogue resistive touch screen, resolution 480 x 271 pixels,
illuminated
136
52
h
Dimensions Front panel 147 x 107 mm Panel cut-out 136 x 96 mm Depth 56 + 4 mm
Fig. 4
Electrical connection 1 three-pole connector 1 nine-pole D-SUB connector
Back of equipment, position of connector
Electrical connection URB 50
+24V #
j
Key
h i j k
Cut-out in control cabinet 136 x 96 mm
l
Connection for supply voltage 24 V DC, pin assignment
Seal D-SUB connector with 9 poles for data line Connector with 3 poles for supply voltage connection
24 V DC
CEP Central earthing point (CEP) in control cabinet
l
1 2 3
L+ M
Pin assignment for data line NRR 2-52, NRR 2-53 - URB 50
Transport temperature –20 ... +80 °C (<100 hours), defrosting time of the de-energized
equipment before it can be put into operation: 24 hours.
Relative humidity 5-85 %, no moisture condensation
L+
Common M
k
Weight approx. 1.0 kg
Storage temperature –20 ... +70 °C, defrosting time of the de-energized equipment
before it can be put into operation: 24 hours.
Connection of supply voltage
ZEP
Protection Front: IP 65 to EN 60529 Back: IP 20 to EN 60529
Ambient temperature when system is switched on: 0 ... 55 °C, during operation: –10 ... 55 °C
4
96
Input / output Interface for data exchange with level controller NRR 2-52,
NRR 2-53.
h
i
Power consumption 8 VA
j
PIN 2
Data_L
PIN 7
Data_H
Fig. 5
Order & Enquiry Specification
Important Notes
Level controller type NRR 2-52
The level controller NRR 2-52, NRR 2-53 is clipped onto the support rail in the control cabinet. The operating & display
unit URB 50 is installed in the cut-out of the control cabinet.
The equipment is supplied with 24 V DC and fused with an external semi-delay fuse 0.5 A.
The power supply unit must be electrically isolated from dangerous contact voltages and must meet at least the requirements on double or reinforced isolation according to one
of the following standards: DIN EN 50178, DIN EN 61010-1,
DIN EN 60730-1 or DIN EN 60950.
To prevent the welding together of contacts provide an external slow-blow fuse T 2.5 A or 1.0 A (TRD 604, 72 hrs.
operation) for the output contacts.
When switching off inductive loads, voltage spikes are produced that may impair the operation of control systems.
Connected inductive loads must be provided with suppressors such as RC combinations as specified by the manufacturer.
To connect the level electrode / the level transmitter use screened multi-core control cable with a min. conductor
size 0.5 mm2, e. g. LiYCY 4 x 0.5 mm2 , max. length: 100 m.
Make sure that connecting cables between the equipment are segregated and run separately from power cables.
GESTRA SPECTORmodule Touch 3-position stepping PI controller with MIN and MAX alarm.
Output: 2 volt-free change-over contacts for MIN/MAX alarm 1 volt-free relay contact for valve open / stop / closed incl.
1 separate operating & display unit type URB 50 with colour touch panel Supply voltage: 24 V DC, 13 VA
Optional extras (please state when ordering):
1 actual value output 4-20 mA 3-element control Level controller type NRR 2-53
GESTRA SPECTORmodule Touch Continuous PI level controller with MIN and MAX alarm
Output: 1 current output 4-20mA for valve actuation 4 volt-free change-over contacts for MIN/MAX alarm
1 actual-value output 4-20 mA (optional) incl.
1 separate operating & display unit type URB 50 with colour touch panel Supply voltage: 24 V DC, 13 VA
Optional extras (please state when ordering):
Actual value output 4-20 mA 3-element control
Supply in accordance with our general terms of business.
GESTRA AG Münchener Straße 77, 28215 Bremen, Germany Telefon +49 421 3503-0, Telefax +49 421 3503-393
E-mail [email protected], Web www.gestra.de 819208-03/04-2020cm (808896-04) · GESTRA AG · Bremen · Printed in Germany