20
Electrical Connection
– continued –
CAN bus wiring diagram
Fig. 17
RES 2
CEP
NRS, NRR, LRR,
TRS, URB 1
URB 2
NRG, LRG,
EF, URZ
TRV
RES 1
Attention
n
Wire equipment in series. Star-type wiring is not permitted!
n
The Bus line must run separately from signal and mains lines.
n
Link screens of control cables such that electrical continuity is ensured and connect
them
once
to the central earthing point (CEP). If equipotential bonding currents are
to be expected, for instance in outdoor installations, make sure that the screen is
separated from the central earthing point (CEP).
n
To protect the switching contacts fuse circuit with T 2.5 A or according to TRD
regulations (1.0 A for 72 h operation).
n
If two or more system components are connected in a CAN bus system, provide the
first and the last device with a terminating resistor of 120 Ω,
Fig. 15, Fig. 16
n
Note that in a CAN bus network only
one
water-level limiting system may be used.
n
Do
not
interrupt the CAN bus network during operation with one or more system
components!
If the CAN bus network is interrupted the saftey circuit will be opened.
Before taking the CAN bus line from the terminal strip, make sure that all connected
system components are out of service.
Содержание NRG 16-41
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