GESTRA NRR 2-40, Installation Instructions Manual

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20
Electrical Connection
– continued –
Tools
n
Screwdriver for slotted screws, size 2.5, completely insulated according to VDE 0680
Note
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Link screen only to terminal 3, ensure electrical continuity and connect it once to the
central earthing point (CEP).
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The loop resistance must be below 10 Ω.
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The rated voltage is indicated on the name plate.
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When switching off inductive loads, voltage spikes are produced that may impair the
operation of control and measuring systems. Provide connected contactors with RC
combinations, e. g. 0.1µF/100 Ω.
n
Even in correctly wired systems high frequency interference caused by the installation
can lead to system outages and malfunction alarms. For more information please refer
to the faultfinding list in the section
Malfunctions – Troubleshooting
.
Bus cable
All devices (level, conductivity) are interconnected via CAN bus. The CANopen protocol is used for the
data exchange between the equipment groups. All devices have an electronic address – the node ID.
The fourcore bus cable serves as power supply and data highway for highspeed data exchange.
The CAN address (node ID) can be set between
1 – 123 .
The equipment has already been configured at our works for operation with other GESTRA components
and can be used straight away without having to set the node ID.
If several identical systems are to communicate in a CAN bus network, set a different node ID for
each system (e. g. limiter, controller, etc).
If the length of the CAN bus cable exceeds 125 m change the settings of the code switch
8
,
Fig. 15. Note that the baud rate setting must be identical for all busbased equipment!
For more information on switch positions see Basic Settings Switch positions .
Basic Settings