Rev. a 03/05 12
DMP025E
POSSIBLE COMBINATIONS AND CONNECTIONS
The control unit can be used with every type of NR7000 controllers,
with SBE type outside temperature sensor and with supervision
system.
As far as the connection with supervision system is concerned,
please contact our Technical Assistance.
Consumption data and power supply and communication criteria are
available on the DIGITROLL 7000 leaflet.
INSTALLATION AND START-UP
Installation
NC7311 control unit is suitable for wall and rack mounting (through a
kit of connecting clamps).
Perform wiring in compliance with the outside connection diagram
and with the existing rules.
It is important to check if the BUS connections are correct in order to
ensure communication between the control unit and the controllers:
in case of faulty connections, the controllers will operate stand
alone, as if the control unit were not installed.
Start-up
The control unit allows editing the operating programmes and
parameters in accordance with the different system requirements.
For an easier start-up stage is available a set of default data which
can be used in every moment by pressing two keys; in order to set
exact date and time as described in the leaflet attached to the
controller.
ATTENTION:
It is necessary to terminate the Communication Bus at the two most distant
devices (controller/unit).
For NR controllers it is necessary to open the controller cap and close the
JP1 jumper.
For the Unit it is necessary to insert in parallel a 121 Ohm 1/4 W
Resistance between the Bus terminals (RT1 and RT2).
In case of replacement of a NC7111 unit (conveyed waves bus) with an
NC7311 (RS485 bus ) it is necessary to insert the DG7ROUT2 repeater
and to place the jumper 2 of SW1 in OFF position in order to configure it
for old-type protocol management.
