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LRR 1-60 - Installation & Operating Manual -
819692-00
Function
The LRR 1-60 conductivity controller is a 3-point stepping controller. It periodically evaluates the data
telegrams from a conductivity electrode (e.g. LRG 16-60, LRG 16-61 or LRG 17-60).
The conductivity controller indicates when MAX or MIN conductivity has been reached, opens or closes a
continuous blowdown valve and can actuate an intermittent blowdown valve.
The data are transferred to an ISO 11898 CAN bus via the CANopen protocol.
Function tests and failure diagnosis are performed using the URB 60 visual display and operating unit.
The data telegrams contain the following information:
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Conductivity values of electrodes and the temperature of the medium
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Fault indications in the event of faults in electronic or mechanical parts
Behaviour when MIN/MAX conductivity is reached
If the minimum or maximum conductivity is reached, the appropriate output contact is opened.
Possible combinations of functions and equipment
Combining the LRR 1-60 conductivity controller with the conductivity electrodes and the URB 60 visual
display and operating unit provides the following functions:
Conductivity controller
LRR 1-60
Function
Evaluation of CAN bus data telegrams from connected LRG 16-60, LRG 16-61 or LRG 17-60
conductivity electrodes.
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3-point stepping controller with proportional integral control (PI controller) and
actuation of an electrically operated continuous blowdown valve.
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MAX alarm when the conductivity limit is exceeded.
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MIN alarm when conductivity drops below the minimum limit.
Alternatively, MIN relay for automated intermittent blowdown.
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Indication of valve position is possible if a potentiometer is connected (in the control valve). The
valve position is then shown on the URB 60 visual display and operating unit.
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Actual value output 4 - 20 mA
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Volt-free input 24 V DC (standby) for inputting an external command: Control OFF/
Valve CLOSED/Intermittent blowdown OFF
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Fig. 3
