7
LRS 1-50
Technical data
Supply voltage
24 VDC +/– 20%
Fuse
external 0.5 A (semi-delay)
Power consumption
4 VA
Connection of conductivity electrode
1 input for conductivity electrode LRG 12-1, LRG 16-4, LRG 17-1 and LRG 19-1
(cell constant 1 cm
-1
), 3 poles with screen
1 input for conductivity electrode LRG 16-9 (cell constant 0.5 cm
-1
), with integrated resistance
thermometer Pt 100, 5 poles with screen.
Measuring voltage
0.8 Vss, pulse duty factor tv = 0.5, frequency 20-10000 Hz.
Measuring range
1 to 10,000 μS/cm at 25 °C or 1 to 5,000 ppm at 25 °C.
Switching hystereses
MIN limit: + 3 % of the adjusted MIN limit,
MAX limit: – 3 % of the adjusted MAX limit.
Outputs
LRS 1-50: 2 volt-free change-over contacts, 8 A 250 V AC / 30 V DC cos
ϕ
= 1.
Provide inductive loads with RC combinations according to manufacturer's specification to ensure
interference suppression
Indicators and adjusters
1 rotary button with integrated push-button for parameter setting and testing MAX /MIN alarm,
1 seven-segment LED display, four digits,
2 red LEDs for MAX/MIN alarm,
1 four-pole code switch for configuration settings
Housing
Housing material: base: polycarbonate, black; front: polycarbonate, grey
Conductor size: 1 x 4.0 mm
2
solid, per wire, or
1 x 2.5 mm
2
per stranded wire with sleeve to DIN 46228 or
2 x 1.5 mm
2
per stranded wire with sleeve to DIN 46228 (min.
∅
0.1 mm)
Terminal strips can be detached. 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. 0.2 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.
