KMB NOVAR-1 Series, Operating Manual

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Novar 1xxx KMB systems
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In case of DC voltage for supplying of contactors, installation of suppression 2A/600V diodes directly
at contactors´s coils is strongly recommended. Furthermore, note lower maximum current load of the
controller outputs at such case ( see technical parameters table).
2.2.5.3 Novar 10xx Controllers
The Novar1005 and Novar1007 relays’ contacts go to terminals 5 through 12. The relays’ common
contacts are internally connected to power supply terminal
L ( No. 4 )
At the Novar1005D and Novar1007D models, the relays’ contacts go to terminals 20 through 27. The
relays’ common contacts are connected to additional terminal
RC ( No. 19 ), that is isolated from
power supply terminals.
In installation there may be a need to test function of each compensation section by manual
connection and disconnection — this can be done in the
Manual mode or using manual intervention in
control process (see further below).
2.2.6 Second Metering Rate, External Alarm
In some situations it may be suitable to operate the controller with two different settings, for example
depending on load characteristics in different daily or weekly zones. To select the setting desired,
there is the second metering rate input.
WARNING !!! This input is not galvanically isolated from the controller’s internal circuitry and
its terminals constitute exposure to hazardous voltage against the ground potential! It is
therefore necessary for the relay, switch or optocoupler, driving the input, to be isolated (no external
voltage) and to be located as close to the controller as possible (optimally in the same cabinet) to
minimize the lead length (maximum about 2 to 3 metres). The input is connected to terminals 11 and
12. The input’s internal power supply voltage is about 30 V DC, switching current about 5 mA.
If the second metering rate active device is a transistor (NPN) or optocoupler, it is necessary to
observe the connection polarity – transistor or optocoupler collector to go to terminal
+ (11) and
emitter to terminal – (12).
When the input is open, the controller operates with the basic metering rate setting, when it is closed
(if the second metering rate function is enabled – see further below), it operates with the second
metering rate setting.
If second metering rate function is switched off, the second metering rate input can be used for
external alarm signal – see description of parameters 30, 40.
Only 12xx and 13xx line controllers feature the second metering rate selection input.
2.2.7 Communication Interface
The controllers can be equipped with galvanically isolated communication interface in compliance with
RS-485 or Ethernet specification for remote setup and control process monitoring.
2.2.7.1 RS-485 Communication Interface
Signal-to-pin configuration for RS-485 type line is shown in Tab. 2.2.
Table 2.2: communication line signal configuration
signal terminal
TR 13
DATA A 14
DATA B 15
GND/C 16