Boiler house Level controls
2
Technical data LCR2251
Supply voltage
24 Vdc +/– 20%
Fuse
External 0.5 A (semi-delay)
Power consumption
4 W
Connection of level transmitter Supply voltage to level transmitter
1 analogue input 4-20 mA, e.g. for LP20/LP21/PA420 level transmitter, 2 poles and screen.
12 Vdc/max. 20 mA
2 floating changeover contacts, 8 A 250 Vac/30 Vdc cos f = 1. De-energizing delay 3 seconds (MIN/ MAX alarm) 1 floating open/close contact, 8 A 250 Vac/30 Vdc cos f = 1 (pump on/off control) 1 analogue output 4-20 mA, max. load 500 ohms (manipulated variable Y or actual value) Inductive loads must have interference suppression (RC combination) as per the manufacturer's specification
Outputs:
2.3 108
3 push buttons for MIN/MAX alarm test and parameter setting 1 green 4-digit 7-segment LED display 2 red LEDs for MIN/MAX alarm 1 amber LED for pump active or manipulated variable Y 1 4-pole code switch for configuration Housing material, base: black polycarbonate; front: grey polycarbonate Conductor size: 1 x 4.0 mm 2 solid, per wire, or 1 x 2.5 mm 2 per lead with sleeve to DIN 46228, or 2 x 1.5 mm 2 per lead with sleeve to DIN 46228 (min. Ø 0.1 mm) Terminal strips can be removed separately Housing attachment: Mounting clip on support rail TH 35, EN 60715
Displays and controls
Housing
Electrical safety
Degree of contamination 2 for installation in control cabinet with degree of protection IP 54, fully insulated
Degree of protection
Housing: IP 40 to EN 60529 Terminal strip: IP 20 to EN 60529
Weight
approx. 0.2 kg
At moment of switch-on 0 ° ... 55 °C In operation –10 ... 55 °C
Ambient temperature
Transport temperature
–20 ... +80 °C (<100 hours), only switch on after a defrosting period of 24 hours
Storage temperature
–20 ... +70 °C, only switch on after a defrosting period of 24 hours
Relative humidity
max. 95%, no moisture condensation
How to specify Continuous PI or ON/OFF level controller with MIN and MAX alarm, 2 volt-free change-over contacts for MIN and MAX alarm, 1 volt- free relay contact for pump / valve control, supply voltage 24V DC 4W. How to order Example: 1 off Spirax Sarco LCR2251 level controller.
TI-P693-23 EMM Issue 1
Page 4 of 4
LCR2251 Level Controller
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