Flowserve NRS1-40.1 Bedienungsanleitung PDF herunterladen (Seite 15)

Wiring

– continued –

Wiring diagram for CAN bus system - example -

■

Wire equipment in series. Star-type wiring is not permitted!

■

Link screens of bus cables such that electrical continuity is ensured and connect them

once to the central earthing point (CEP).

■

Because of the self-checking routine of the output contacts the control unit NRS 1-40.1

must always be the first equipment in the safety circuit, which means that terminal 25

must be permanently connected to L of the safety circuit.

■

Terminal N

(18) must be permanently connected to the zero potential (N) of the safety

circuit. Non-compliance will cause malfunctions, in particular if the control unit and the

safety circuit are supplied with different voltage potentials (e. g. control unit 230 V / safety

circuit 24 V). Provided that the electric potentials are equal, a wire link can be attached

to terminals 17 and 18.

■

To protect the switching contacts provide the circuit with a T 2.5A or 1.0A fuse (TRD 604,

72 hrs. operation).

■

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 120Ω (terminal CL/CH).

■

Only one control unit NRS 1-40.1 may be used per CAN bus network.

■

The CAN bus system must not be interrupted during operation.

In the event of an interruption a malfunction alarm is raised.

Central

earthing point

CEP

Operating device

NRS 1-40.1

Level electrode

NRG 1x-40

Level electrode

NRG 1x-41.1

Temperature

transmitter

TRV 5-40

Terminating resistor

120Ω

Terminating resistor

120Ω

Voltage supply CAN data line

Level electrode

NRG 1x-40

Fig.6

Attention

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 33 34

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