Advantech RS-485 user manual ADAM-4000/5000 System Grounding Installation

ADAM-4000/5000 System Grounding Installation

E. 1 Power Supplies For relevant wiring issues, please refer to the following scheme :

E R T

AC Power Line

MNFB

	Isolation AC Transformer
Tr3	To prevent system control from interferences caused by external power
	N F B		+		A D A M 5 0 0 0
				+ V	C
		P / S
			-		P / S P	I / O
				G N D	U
		D C 1 0 ~ 3 0 V
	N F B
					Connect to AI/DI/DO modules (not for Relay output)
		P / S
					The power sources for DI. DO. and AI. should be independent
		D C 2 4 V
	N F B			D C
		P / S			Only for Relay output

D C 2 4 V A C

Fan, Light...etc.

E 1 R 1 T 1

Figure E-1: Grounding Scheme

E.2 Grounding Installation

ØThe outer case for the module is made of iron and fitted with a fan and convection holes with filters.

ØIf possible, wiring should be connected to the module through an external terminal block (T/B) to avoid external wires directly getting into the inside of the module. Its advantages are (1) a clear demar- cation for external/internal wiring responsibility, (2) wire numbering can be arranged in an explicit and concise manner, and (3) an easy diagnostics for the wiring problems and a more aesthetical layout plan.

E-2 ADAM-5000