Nx Networks NX series user manual Control cables, Galvanic isolation barriers

42(86) Cabling and connections

6.2.1.1Control cables

The control cables shall be at least 0.5 mm2 screened multicore cables, see Table 6-1. The maximum terminal wire size is 2.5 mm2 for the relay terminals and 1.5 mm2 for other terminals.

6.2.1.2Galvanic isolation barriers

The control connections are isolated from the mains potential and the GND terminals are permanently connected to ground. See Figure 6-17.

The digital inputs are galvanically isolated from the I/O ground. The relay outputs are additionally double-isolated from each other at 300VAC (EN-50178).

10Vref			Gate drivers	L1	L2	L3
GND
+24V
GND	Control I/O
AI1	ground
AI2+
AI2 -		Control
DIN1...			Main
	Digital input	panel
DIN3			circuits	Control
	group A
CMA				board
DIN4...	Digital input
DIN6
	group B
CMB		Control
AO1+	Analogue	board
AO2 -	output
DO1	Digital
	output
RO1/1
RO1/2
RO1/3
RO2/1
RO2/2				U	V W
RO2/3
	nk6_15

Figure 6-17. Galvanic isolation barriers

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