ABB NIBA-01, Руководство по установке и запуску

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Chapter 4 – Electrical Installation
4-2 NIBA-01 Installation and Start-up Guide
Module Earthing The NIBA-01 module earth is connected to the rail onto which the
module is mounted. If the rail is fastened to an earthed metallic
assembly plate, the module is automatically earthed, and no external
earthing wire is needed. If the rail is fastened to a base that is not
earthed, the rail must be connected to the nearest earthing terminal.
However, the earthing wire should not be connected to the same
terminal as the power cable screens. (See page 3-1.)
Bus Cable Connections
The incoming bus cable and the external power supply are connected
to terminal block X1 on the NIBA-01. The outgoing bus cable (if
required) is connected to X2. See the connection diagram on page 4-4.
Note: If the NIBA-01 module is the last station on the remote bus, the
terminals of X2 are left unconnected.
Bus Cable Specifications Ready-made remote bus cables in different lengths are available from
Phoenix Contact. If these are not used, the cable should fulfil the
following specifications:
Parameter Value Test Method
No. of Conductors 3 x 2 (twisted pairs), common shield –
Conductor Cross-section Min. 0.2 mm
2
–
Conductor Resistance (DC) Max. 9.6
Ω
/m VDE 0472-501, IEC 189-1 cl. 5-1
Characteristic Impedance 120
Ω
± 20% at f = 0.064 MHz,
100
Ω
± 15% at f > 1 MHz
IEC 1156-1 cl. 3.3.6
Dielectric Strength, Conductor/Conductor,
Conductor/Shield 1000 V RMS, 1 min VDE 0472-509 Test type C or
IEC 189-1 cl. 5.2
Insulation Resistance (after Dielectric
Strength test) Min. 150 M
Ω
/1000 metres of cable VDE 0472-509 Test type B or
IEC 189-1 cl. 5.3
Maximum Transfer Impedance at 30 MHz 250 m
Ω
/m IEC 96-1
Operating Capacity at 800 Hz Max. 60 nF/1000 metres of cable VDE 0472-504 Test type A,
IEC 189-1 cl. 5-4
Minimum Near-end Crosstalk Attenuation
(NEXT) for 100 metres of cable at VDE 0472-517 or
IEC 1156-1 cl. 3.3.4
0.722 MHz
1 MHz
2 MHz
4 MHz
8 MHz
10 MHz
16 MHz
20 MHz
61 dB
59 dB
55 dB
50 dB
46 dB
44 dB
41 dB
40 dB