7
LRR 1-40
Technical Data
Type approval no.
TÜV.WÜL.xx-007
Input / output
Interface for CAN bus according to ISO 11898 CANopen.
Inputs
One analog control input for signalling the valve position via a feedback potentiometer 1000 Ω,
320° angle of rotation, supply voltage 5 V DC.
One voltage input 18-36 V AC (50/60 Hz) or DC for external command:
control OFF, valve CLOSED, intermittent blowdown OFF. With DC protected against polarity reversal.
Outputs
Current supply for CAN bus 18-36 V DC, short-circuit protected.
Four volt-free relay contacts.
Max. contact rating with switching voltages of 24 V AC/DC, 115 V AC and 230 V AC:
resistive / inductive 4 A.
Contact material AgNi 0,15.
Connected contactors must be provided with suppressors such as RC combinations as specified by the
manufacturer.
One current output 4-20 mA as actual value, max. load 500 Ω (optional).
Indicators and adjustors
Four pushbuttons as operating elements.
Four LEDs (red/green) for indicating the operationg modes.
One red LED “Bus Status”
One green LED “Power”
One 10-pole code switch: 7 poles for node ID, 3 poles for baud rate setting.
Setpoint W
Adjustable within the measuring range between the MIN/MAX limits.
Control range (configuration as proportional controller)
Beginning: 0.5 x setpoint W up to 1.5 x setpoint W
Dead band (configuration as proportional controller)
Based on setpoint W:
Setpoint W below 2000 μS/cm (1000 ppm) DB = 3 %
Setpoint W above 2000 μS/cm (1000 ppm) DB = 1 %
Switching hysteresis of controller output (configuration as 2-position controller)
Adjustable between 1 and 25 % of the adjusted setpoint.
Operating position of the continuous blowdown valve
Adjustable as a function of the continuous blowdown valve.
Proportional band X
p
From 1 to 150 % relative to setpoint W (configuration as proportional controller), adjustable,
0 % (configuration as 2-position controller).
MIN/MAX limits
Measuring range up to 200 µS/cm (100 ppm):
MIN limit adjustable between 0.5 μS/cm (0.25 ppm) and MAX limit –2 μS/cm (1 ppm),
MAX limit adjustable between 200 μS/cm (100 ppm) and MIN limit +2 μS/cm (1 ppm).
